Earthquake Detection System

Abstract

To provide an earthquake detection system that can accurately predict the epicenter of an earthquake using an electromagnetic wave sensing part (earthquake sensing device) that senses electromagnetic waves. [Solution] The earthquake detection system for detecting earthquakes comprises an electromagnetic wave sensing part 21 that senses the electromagnetic waves of the primary destruction that occurs before an earthquake occurs, and an electromagnetic wave measuring device that measures the amplitude and time of sensing of the electromagnetic waves sensed by the electromagnetic wave sensing part 21. A plurality of electromagnetic wave sensing parts 21 are arranged at separate locations, and the electromagnetic wave measuring device performs calculations to identify the epicenter H from the magnitude of the amplitude of the electromagnetic waves sensed by the electromagnetic wave sensing parts 21 at at least three locations.

Description

[Technical Field]

[0001] This invention relates to earthquake detection, and is an earthquake detection system that predicts the epicenter of an earthquake using an electromagnetic wave sensing part (earthquake sensing device) that senses electromagnetic waves. [Background technology]

[0002] Conventionally, the phenomenon of electromagnetic wave generation as a precursor to earthquakes has been widely known, and sensing (detecting) weak electromagnetic waves has been utilized to predict earthquakes. As such technologies, the technologies disclosed in Patent Documents 1, 2, and 3 are listed.

[0003] The technology of Patent Document 1 comprises an earthquake information acquisition means for acquiring a plurality of pieces of earthquake information, a past motion information acquisition means for accessing a motion information database and acquiring motion information before each earthquake occurs, a past Mahalanobis distance calculation means for calculating the past Mahalanobis distance before each earthquake occurs, a past maximum Mahalanobis distance extraction means for extracting the past maximum Mahalanobis distance, which is the statistical maximum value within a specified period, an epicenter prediction function acquisition means for calculating an epicenter prediction function, and / or a magnitude prediction function acquisition means for calculating a magnitude prediction function.

[0004] The technology in Patent Document 2 is an electromagnetic wave measuring device that is composed of a group of electromagnetic wave sensors at over 10,000 locations covering a wide area on land and sea, a network that collects detection information from each sensor, and an information processing device that integrates the position of each sensor and the collected detection information, and displays the distribution of detected locations of electromagnetic waves that may be precursors to earthquakes.

[0005] Furthermore, the technology of Patent Document 3 is an earthquake prediction system that includes a measuring device capable of detecting elastic waves in the low frequency band and converting them into elastic wave data, and an information processing device that receives the elastic wave data, wherein the information processing device has a prediction means for predicting seismic intensity, and the measuring device has nine or more microphones installed underground or on the ground, of which eight or more are installed at approximately equal angular intervals in a circular ring shape with their faces approximately perpendicular to the direction of gravity, and one or more are installed at the center of the ring, and the receiving parts of the microphones installed in the circular ring are installed so that they face in the opposite direction to the center of the ring, and the receiving part of the microphone installed at the center of the ring is installed so that it faces in the direction of gravity.

[0006] Furthermore, the technology of Patent Document 4 is a micro-vibration detection device that is installed at the bottom of a well and has a receiver equipped with multiple small pieces that can move due to minute vibrations in the water, an ultrasonic sensor that detects the positions of the multiple small pieces, and a means for converting the positions of the multiple small pieces detected by the ultrasonic sensor into an image.

[0007] Generally, the electromagnetic waves of the primary rupture that occurs before an earthquake propagate underground or underwater, and by detecting these electromagnetic waves of the primary rupture that have propagated underground or underwater, it is possible to predict the epicenter of an earthquake. However, electromagnetic waves (radio waves) such as those used for television broadcasting are flying around on the ground, and if earthquake detection sensors are placed on the ground, it becomes difficult to predict the epicenter due to the disturbing electromagnetic waves from television broadcasting and other sources.

[0008] However, the earthquake prediction device in Patent Document 1 needs to access an operation information database that stores past operation information for specific generators installed, and use operation information from before each past earthquake occurred. This makes the device not simple, and the prediction of the epicenter relies on past information, which reduces the accuracy of predicting the epicenter of the most recent earthquake.

[0009] Furthermore, the electromagnetic wave measuring device of Patent Document 2 and the earthquake prediction system of Patent Document 3 are affected by electromagnetic waves generated from other sources on land, and most electromagnetic waves diffuse in the sea due to differences in conductivity between the sea and the atmosphere, making it difficult to measure electromagnetic waves generated from underground before an earthquake.Furthermore, the micro-vibration detection device of Patent Document 4 simply has a receiver installed at the bottom of a well, and is not placed deep enough to not be affected by earthquake prediction, so it is also difficult to accurately measure electromagnetic waves generated from underground before an earthquake. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-184128 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-77448 [Patent Document 3] Patent No. 5161387 [Patent Document 4] Utility Model Registration No. 3113345 Summary of the Invention [Problem to be solved by the invention]

[0011] This invention relates to earthquake detection, and aims to provide an earthquake detection system that can accurately predict the epicenter of an earthquake using an electromagnetic wave sensing part (earthquake sensing device) that senses electromagnetic waves. [Means for solving the problem]

[0012] [1] An earthquake detection system for detecting earthquakes, The system is provided with an electromagnetic wave sensing part that senses electromagnetic waves of the primary destruction that occurs before the occurrence of an earthquake, and an electromagnetic wave measuring device that measures the amplitude and the time of sensing of the electromagnetic waves sensed by the electromagnetic wave sensing part, A plurality of the electromagnetic wave sensing parts are arranged at separate positions, The electromagnetic wave measuring device is characterized in that it identifies the epicenter by performing calculations based on the amplitude of the electromagnetic waves detected by the electromagnetic wave sensing portions at at least three locations.

[0013] According to this configuration, the earthquake detection system includes an electromagnetic wave sensing section that senses the electromagnetic waves of the primary rupture that occurs before an earthquake occurs, and an electromagnetic wave measuring device that measures the amplitude and time of sensing of the electromagnetic waves sensed by the electromagnetic wave sensing section. Multiple electromagnetic wave sensing sections are arranged at separate locations, and the electromagnetic wave measuring device identifies the epicenter by performing calculations based on the amplitude of the electromagnetic waves from at least three electromagnetic wave sensing sections, so that the electromagnetic wave sensing section (earthquake sensing device) that senses electromagnetic waves can be used to accurately predict the epicenter of an earthquake. Furthermore, because the electromagnetic wave measuring device can identify the epicenter with at least three electromagnetic wave sensing sections, it can accurately predict the epicenter of an earthquake with a simple configuration.

[0014] [2] Preferably, the electromagnetic wave sensing portion is located on the seabed, underwater, on the sea surface, on the ground, or at the bottom of a borehole drilled from the earth's surface including the seabed and the ground.

[0015] According to this configuration, the electromagnetic wave sensing part is placed either on the seabed, underwater, at the sea surface, on the ground, or at the bottom of a hole bored from the earth's surface including the seabed and the ground. Therefore, by placing electromagnetic wave sensing parts everywhere, it is possible to accurately predict the epicenter of earthquakes occurring in various locations.

[0016] [3] Preferably, the electromagnetic wave measuring device measures the electromagnetic waves detected by the electromagnetic wave detecting portion and performs arithmetic processing to predict the magnitude of an earthquake.

[0017] With this configuration, the electromagnetic wave measuring device measures the electromagnetic waves detected by the electromagnetic wave sensing part and also performs calculations to predict the scale of the earthquake, so that by predicting not only the epicenter but also the scale of the earthquake, it is possible to more thoroughly prepare to respond to earthquakes.

[0018] [4] Preferably, at least the upper part of the electromagnetic wave sensing part is covered with an electromagnetic wave blocking material, so that it senses the electromagnetic waves of the primary destruction that occurs before an earthquake occurs without being affected by disturbing electromagnetic waves from the ground.

[0019] With this configuration, at least the upper part of the electromagnetic wave sensing part is covered with an electromagnetic wave blocking material, so it can sense the electromagnetic waves of the primary breakdown that occurs before an earthquake occurs without being affected by disturbing electromagnetic waves from the ground. This prevents the influence of disturbing electromagnetic waves generated from other parts of the ground, prevents the electromagnetic waves from diffusing underwater and releasing a small amount into the atmosphere, making it impossible to measure, and enables accurate prediction of the epicenter of an earthquake.

[0020] [5] Preferably, the electromagnetic wave sensing portion is disposed on the seabed or in the sea, The location where the electromagnetic wave sensing portion is placed is at a depth of 60 m or more below the sea surface.

[0021] According to this configuration, the electromagnetic wave sensing portion is placed on the seabed or underwater, and since the position where the electromagnetic wave sensing portion is placed is more than 60 m below the sea surface, the electromagnetic wave sensing portion is placed in a deep position where it cannot be reached by electromagnetic waves from terrestrial disturbances, and it is possible to prevent the influence of electromagnetic waves that cause disturbances generated from other parts of the earth. This prevents the influence of electromagnetic waves that cause disturbances generated from other parts of the earth, prevents the electromagnetic waves from diffusing underwater and releasing a small amount into the atmosphere, making it impossible to measure, and enables accurate prediction of the epicenter of an earthquake. [Effects of the Invention]

[0022] This relates to earthquake detection, and an electromagnetic wave sensing part (earthquake sensing device) that senses electromagnetic waves can be used to accurately predict the epicenter of an earthquake. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a cross-sectional view of an electromagnetic wave sensing part according to an embodiment of the present invention; [Figure 2] This is an elevation view of the mechanism of the earthquake prediction measurement device when placed on the surface or seabed. [Figure 3] This is a cross-sectional view of the mechanism by which electromagnetic waves are generated before an earthquake. [Figure 4] This is a correlation diagram between the time when electromagnetic waves are generated and the time when earthquakes occur. [Figure 5] 1 is an explanatory diagram of a borehole of an earthquake detection system according to an embodiment of the present invention; [Figure 6] 1 is an explanatory diagram of an earthquake detection system in which an electromagnetic wave sensing element according to an embodiment of the present invention is placed at the bottom of a borehole. [Figure 7] 1 is an explanatory diagram of an earthquake detection system in which an electromagnetic wave sensing part according to an embodiment of the present invention is placed on the seabed. [Figure 8] 3 is a diagram illustrating the operation of wireless information transmission in the earthquake detection system according to the embodiment of the present invention. [Figure 9] 1 is an explanatory diagram illustrating how an earthquake detection system according to an embodiment of the present invention identifies an epicenter. [Figure 10] (A) is a diagram illustrating the waveform of an electromagnetic wave in the electromagnetic wave sensing portion 21a of Fig. 9. (B) is a diagram illustrating the waveform of an electromagnetic wave in the electromagnetic wave sensing portion 21b of Fig. 9. (C) is a diagram illustrating the waveform of an electromagnetic wave in the electromagnetic wave sensing portion 21c of Fig. 9. [Figure 11] 11 is a diagram illustrating the relationship between the amplitude of the electromagnetic waves and the distance from the electromagnetic wave sensing portion to the epicenter in FIGS. 9 and 10. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes an embodiment of the present invention with reference to the accompanying drawings, which conceptually (schematically) illustrate an example of an earthquake detection system. [Example]

[0025] FIG. 1 is a cross-sectional view of an electromagnetic wave sensing portion according to an embodiment of the present invention. As shown in FIG. 1, an earthquake detection system 10 includes an electromagnetic wave sensing portion (earthquake sensing device, electromagnetic wave sensor) 21 that senses (detects) the electromagnetic waves of the primary disruption that occurs before an earthquake occurs. The electromagnetic wave sensing portion 21 is placed on the ground surface 34, and its top is covered with an electromagnetic wave blocking material 22. The material of the electromagnetic wave blocking material 22 may be any insulating material such as vinyl or rubber. This allows the detection of the electromagnetic waves of the primary disruption that occurs before an earthquake occurs and during a volcanic eruption without being affected by electromagnetic waves on the ground that cause disturbances.

[0026] In the embodiment, the electromagnetic wave sensing portion 21 is installed on the ground surface 34, but the present invention is not limited to this and the electromagnetic wave sensing portion 21 may be installed on the seabed, underwater, at the sea surface, on the ground, or at the bottom of a hole bored from the ground surface including the seabed and the ground. In this case, the bottom may be a location where the N value, which represents the strength of the ground as determined by a standard penetration test, is 100 or more, and the seabed may be located at a depth of 60 m or more below the sea surface.

[0027] Figure 2 is an elevation view of the structure of an earthquake prediction measurement device when placed on the ground or seabed. As shown in Figure 2, earthquake detection system 10 comprises electromagnetic wave sensing section 21 that senses the electromagnetic waves of the primary disruption that occurs before an earthquake occurs, and electromagnetic wave measuring device 20 that measures and processes the electromagnetic waves sensed by electromagnetic wave sensing section 21 to predict at least one of the timing, magnitude, and location of an earthquake, the magnitude of a tsunami, and the time of arrival at a specific location. By placing electromagnetic wave sensing section 21 directly on the ground 31 or seabed 35 shown in Figure 5 (the ground 31 and seabed 35 are collectively referred to as the earth's surface 34), the electromagnetic waves of the primary disruption can be reliably measured.

[0028] Figure 3 is a cross-sectional view of the mechanism by which electromagnetic waves are generated before an earthquake. As shown in Figure 3, the amount of electromagnetic waves generated is proportional to the magnitude of the earthquake, making it possible to predict the size of the earthquake and the size of the tsunami that will occur.

[0029] Figure 4 shows the correlation between the time when electromagnetic waves are generated and the time when earthquakes occur. As shown in Figure 4, the time when electromagnetic waves are generated is proportional to the compressive force applied to the bedrock, and the larger the scale of the earthquake, and the longer the time between the generation of electromagnetic waves and the occurrence of an earthquake, the more likely it is that the earthquake will occur inside the continent. It can be predicted that this will be the case.

[0030] FIG. 5 is an explanatory diagram of a borehole in an earthquake detection system according to an embodiment of the present invention. As shown in FIG. 5, a hole 32 is formed by boring into the earth's surface 34 (including the land surface 31 and the seabed 35). The diameter D of the hole 32 bored from the surface is 30 mm or more and 500 mm or less. The depth L1 of the hole 32 from the earth's surface 34 is L1. If the N value (a value representing the strength of the ground determined by a standard penetration test) of the hole's bottom 33 is 100 or more, the depth L1 can be any value. However, if the electromagnetic wave sensing portion 21 is placed on the seabed 35 regardless of the N value, the depth L1 must be 60 m or more.

[0031] Figure 6 is an explanatory diagram of an earthquake detection system in which an electromagnetic wave sensing unit according to an embodiment of the present invention is placed at the bottom of a borehole. As shown in Figure 6, the earthquake detection system 10 for predicting and observing earthquakes comprises an electromagnetic wave sensing unit (earthquake sensing device, electromagnetic wave sensor) 21 that senses the electromagnetic waves of the primary rupture that occurs before an earthquake occurs, and an electromagnetic wave measuring device 20 that measures and processes the electromagnetic waves sensed by the electromagnetic wave sensing unit 21 to predict at least one of the timing, magnitude, and location of an earthquake, the magnitude of a tsunami, and the time of arrival at a specific location.

[0032] The electromagnetic wave sensing portion 21 is placed at the bottom 33 (see FIG. 5) of a hole 32 bored from the earth's surface 34, which includes the seabed 35 and the ground 31. The bottom 33 is a location where the N value, which indicates the strength of the ground as determined by a standard penetration test, is 100 or more.

[0033] This configuration places the electromagnetic wave sensing portion 21 deep enough that it cannot be reached by electromagnetic waves from terrestrial sources, preventing the effects of electromagnetic waves from other terrestrial sources. Furthermore, the bottom 33 where the electromagnetic wave sensing portion 21 is located has an N value of 100 or more, which represents the strength of the ground as determined by standard penetration tests. Therefore, even weak electromagnetic waves from primary ruptures that occur before an earthquake can be easily detected. This prevents the effects of electromagnetic waves from other terrestrial sources, and prevents the underwater phenomenon where electromagnetic waves diffuse and are released into the atmosphere in small amounts, making them impossible to measure. This allows accurate prediction of earthquakes and volcanic eruptions.

[0034] The diameter of the hole drilled from the ground surface is between 30mm and 500mm. This allows the hole to be formed using standard boring work, reducing the installation costs associated with boring work. Also, by making the hole diameter 500mm or less, it is difficult for electromagnetic waves that cause disturbance from the ground to penetrate deep into the hole, reducing the impact of disturbances.

[0035] One end of the electromagnetic wave sensing part 21 is equipped with a conducting wire (cable) 23 that transmits information about the sensed electromagnetic waves, and this conducting wire is covered with an insulator (insulating coating, rubber, vinyl) 24. This makes it possible to sense the electromagnetic waves of the primary breakdown that occurs before an earthquake occurs without being affected by external electromagnetic waves.

[0036] FIG. 7 is an explanatory diagram of an earthquake detection system in accordance with an embodiment of the present invention, in which an electromagnetic wave sensing element is placed on the seabed. As shown in FIG. 7, the earthquake detection system 10 includes an electromagnetic wave sensing element 21 that senses the electromagnetic waves of the primary disruption that occurs before an earthquake occurs, and an electromagnetic wave measuring device 20 that measures and processes the electromagnetic waves sensed by the electromagnetic wave sensing element 21 to predict at least one of the timing, magnitude, and location of an earthquake, the magnitude of a tsunami, and the time of arrival at a specific location. The electromagnetic wave sensing element 21 is placed on the seabed 35 or underwater 30, and its location (depth L2) is 60 meters or more below the sea surface (ocean surface) 30a. One end of the electromagnetic wave sensing element 21 is equipped with a conductive wire (cable) 23 that transmits information about the sensed electromagnetic waves. This conductive wire is covered with an insulator (insulating coating) 24.

[0037] In this way, the electromagnetic wave sensing portion 21 is placed on the seabed 35 or underwater 30, and the position (depth L2) at which the electromagnetic wave sensing portion 21 is placed is 60 m or more below the sea surface, so the electromagnetic wave sensing portion 21 is placed at a deep position where disturbance electromagnetic waves from the ground cannot reach, and can be prevented from being affected by disturbance electromagnetic waves generated from other places on land. This prevents the influence of disturbance electromagnetic waves generated from other places on land, prevents the electromagnetic waves from diffusing underwater and releasing small amounts into the atmosphere, making it impossible to measure, and enables accurate prediction and observation of earthquakes and volcanic eruptions.

[0038] Fig. 8 is a diagram showing the operation of wireless information transmission in an earthquake detection system according to an embodiment of the present invention. As shown in Fig. 8, one end of the electromagnetic wave sensing part 21 is provided with a conductor 23 for transmitting information about the sensed electromagnetic waves, and the information about the sensed electromagnetic waves can be wirelessly transmitted from the electromagnetic wave sensing part 21 to the electromagnetic wave measuring device 20 via a wireless transmitter 25 provided at the other end of the conductor 23, and can be received by a receiver 26 provided on the electromagnetic wave measuring device side.

[0039] In this way, information about the detected electromagnetic waves can be transmitted wirelessly from the wireless transmitter 25 installed at the other end of the conductive line 23 from the electromagnetic wave sensing portion 21 to the electromagnetic wave measuring device 20, so that earthquakes and volcanic eruptions can be easily predicted even if the electromagnetic wave sensing portion 21 is located remotely from the electromagnetic wave measuring device 20.

[0040] 9 is an explanatory diagram for identifying an epicenter using an earthquake detection system according to an embodiment of the present invention. As shown in Fig. 9, a plurality of electromagnetic wave sensing units 21 (21a to 21g, ...) are arranged at locations distant from the earth's surface (ground, seabed), the seabed, underwater, the sea surface, the ground, or the bottom of a borehole drilled from the earth's surface including the seabed and ground.

[0041] When an earthquake occurs at epicenter H, the electromagnetic waves are sensed (detected) at the same time by, for example, three electromagnetic wave sensing parts 21a, 21b, and 21c located at different locations. Because electromagnetic waves travel at a speed equivalent to the speed of light, they arrive at the same time regardless of the distance from the epicenter.

[0042] Fig. 10(A) is a diagram explaining the waveform of the electromagnetic wave in the electromagnetic wave sensing portion 21a of Fig. 9. Fig. 10(B) is a diagram explaining the waveform of the electromagnetic wave in the electromagnetic wave sensing portion 21b of Fig. 9. Fig. 10(C) is a diagram explaining the waveform of the electromagnetic wave in the electromagnetic wave sensing portion 21c of Fig. 9. For any earthquake, the closer the distance from the epicenter, the larger the amplitude of the electromagnetic wave waveform, and the farther the distance from the epicenter, the smaller the amplitude.

[0043] 10(A) has a large amplitude Va, so the distance ra from the epicenter to electromagnetic wave sensing portion 21a is short. In FIG. 10(B) , the amplitude Vb is smaller than Va, so the distance rb from the epicenter to electromagnetic wave sensing portion 21b is greater than the distance ra from the epicenter to electromagnetic wave sensing portion 21a. In FIG. 10(C) , the amplitude Vc is smaller than Vb, so the distance rc from the epicenter to electromagnetic wave sensing portion 21c is greater than the distance rb from the epicenter to electromagnetic wave sensing portion 21b.

[0044] In other words, the magnitude relationship of the electromagnetic wave amplitude is Va>Vb>Vc, and the magnitude relationship of the distance from the epicenter is ra <rb<rcとなる。

[0045] Figure 11 is a diagram explaining the relationship between the amplitude of the electromagnetic waves in Figures 9 and 10 and the distance from the electromagnetic wave sensing area to the epicenter. When calculating the surface areas of two types of spheres, if the radius of sphere 1 is assumed to be twice the radius of sphere 2, then the surface area of ​​sphere 1 will be four times the surface area of ​​sphere 2. In other words, the surface area ratio of similar solids is the square ratio of the similarity ratio.

[0046] Therefore, if Vb=2Vc, then rc=2 2 ×rb=4rb. Also, if Va=3Vc, then rc=3 2 ×ra=9ra.

[0047] Additionally, the electromagnetic waves of an earthquake can occur in two ways: first, a large earthquake (occurs between 3 and 30 days), or one that cannot be observed by a seismic intensity meter (occurs between 0 and 5 seconds). By observing electromagnetic waves in three or more locations (at a depth of 1000m or more), the size and location of the earthquake can be determined. In past earthquakes, earthquakes have occurred one after the other (earthquakes larger than the electromagnetic waves. The depth of the epicenter is greater than that of the Great East Japan Earthquake, for example). The size of aftershocks can be determined by observing electromagnetic waves at the same time as the large earthquake (occurs between 1 and 20 days). Eruption activity, earthquakes, and large earthquakes are proportional in order, occurring immediately or after a while. Eruption activity, earthquakes, and large earthquakes are proportional to depth.

[0048] 2, 9, 10, and 11, an earthquake detection system 10 for detecting earthquakes comprises an electromagnetic wave sensing portion 21 that senses the electromagnetic waves of the primary disruption that occurs before an earthquake occurs, and an electromagnetic wave measuring device 20 that measures the amplitude and detection time of the electromagnetic waves sensed by the electromagnetic wave sensing portion 21. A plurality of electromagnetic wave sensing portions 21 are arranged at separate locations, and the electromagnetic wave measuring device 20 performs calculations based on the magnitude of the amplitude of the electromagnetic waves sensed by the electromagnetic wave sensing portions 21 at at least three locations to identify the epicenter H.

[0049] The electromagnetic wave sensing portion 21 is placed on the seabed, underwater, on the sea surface, on the ground, or at the bottom of a hole bored from the earth's surface including the seabed and the ground.

[0050] The electromagnetic wave measuring device 20 also measures the electromagnetic waves detected by the electromagnetic wave detecting section 21 and processes them to predict the magnitude of the earthquake.

[0051] At least the upper part of the electromagnetic wave sensing part 21 is covered with an electromagnetic wave shielding material 22, and it senses the electromagnetic waves of the primary destruction that occurs before an earthquake occurs without being affected by electromagnetic waves from the ground that cause disturbances.

[0052] The electromagnetic wave sensing portion 21 is placed on the seabed or in the sea, and the position where the electromagnetic wave sensing portion 21 is placed is at a depth of 60 m or more below the sea surface.

[0053] The effects of the earthquake detection system 10 described above will now be described. A plurality of electromagnetic wave sensing portions 21 are arranged at separate locations, and the electromagnetic wave measuring device 20 identifies the epicenter by performing calculations based on the amplitude of the electromagnetic waves from at least three electromagnetic wave sensing portions 21, so that it is possible to accurately predict the epicenter of an earthquake using the electromagnetic wave sensing portions 21 (earthquake sensing device 20) that sense electromagnetic waves. Furthermore, because the electromagnetic wave measuring device 20 can identify the epicenter with the electromagnetic wave sensing portions 21 in at least three locations, it is possible to accurately predict the epicenter of an earthquake with a simple configuration.

[0054] Furthermore, the electromagnetic wave sensing portion 21 is placed either on the seabed, underwater, at the sea surface, on the ground, or at the bottom of a hole bored from the earth's surface including the seabed and the ground, so by placing the electromagnetic wave sensing portion 21 everywhere, it is possible to accurately predict the epicenter H of earthquakes occurring in various locations.

[0055] Furthermore, the electromagnetic wave measuring device 20 measures the electromagnetic waves detected by the electromagnetic wave sensing portion 21 and also processes them to predict the magnitude of the earthquake, so that by predicting not only the epicenter but also the magnitude of the earthquake, it is possible to prepare more thoroughly to respond to earthquakes.

[0056] Furthermore, because at least the upper part of the electromagnetic wave sensing part 21 is covered with the electromagnetic wave blocking material 22, it can sense the electromagnetic waves of the primary breakdown that occurs before an earthquake occurs without being affected by disturbing electromagnetic waves from the ground. This prevents the influence of disturbing electromagnetic waves generated from other parts of the ground, and prevents electromagnetic waves from being diffused underwater and releasing a small amount into the atmosphere, making it impossible to measure, thereby making it possible to accurately predict the epicenter of an earthquake.

[0057] Furthermore, the electromagnetic wave sensing portion 21 is placed on the seabed or underwater, and since the position where the electromagnetic wave sensing portion 21 is placed is more than 60 m below the sea surface, the electromagnetic wave sensing portion 21 is placed in a deep position where it cannot be reached by electromagnetic waves that cause disturbances from the ground, and can be prevented from being affected by electromagnetic waves that cause disturbances generated from other places on land. This prevents the influence of electromagnetic waves that cause disturbances generated from other places on land, prevents the situation where electromagnetic waves diffuse underwater and the amount released into the atmosphere is small, making it impossible to measure, and enables accurate prediction of the epicenter of an earthquake.

[0058] In the embodiment, when the electromagnetic wave sensing portion 21 is placed at the bottom 33 of a boring hole 32 where the N value is 100 or more, at least the upper part of the electromagnetic wave sensing portion 21 is not coated with the insulator 24, but this is not limited to this, and even if the bottom 33 has an N value of 100 or more, at least the upper part of the electromagnetic wave sensing portion 21 may be coated with the insulator 24.

[0059] Furthermore, in the embodiment, when the electromagnetic wave sensing portion 21 is placed on the seabed 35 or underwater 30 at a depth of 60 m or more below the sea surface, at least the upper portion of the electromagnetic wave sensing portion 21 is not coated with the insulator 24, but this is not limited to this, and even if the bottom 33 has an N value of 100 or more, at least the upper portion of the electromagnetic wave sensing portion 21 may be coated with the insulator 24.

[0060] In addition, in the embodiments, the electromagnetic wave sensing portion 21 is placed on the seabed 35 or underwater 30 at a depth of 60 m or more from the sea surface, or at the surface of the earth or the bottom of a hole where the N value is 100 or more, but this is not limited to this, and the electromagnetic wave sensing portion 21 may be placed at a position shallower than 60 m from the sea surface, or at the surface of the earth or the bottom of a hole where the N value is less than 100.

[0061] In other words, the present invention is not limited to the embodiments as long as the functions and effects of the present invention are achieved. [Industrial Applicability]

[0062] The earthquake detection system of the present invention relates to earthquake detection, and is a system that predicts the epicenter of an earthquake using an electromagnetic wave sensing part (earthquake sensing device) that senses electromagnetic waves. [Explanation of symbols]

[0063] 10. Earthquake detection system 20... Electromagnetic wave measurement device (electromagnetic wave measurement part) 21... Electromagnetic wave sensing part (earthquake sensing device, electromagnetic wave sensor) 22... Electromagnetic wave blocking materials (insulators, vinyl, rubber) 23... Conductive wire (cable, metal, carbon) 24... Insulator (coating, vinyl, rubber) 25... Radio transmitting device (transmitting device) 26... Receiving device 30…under the sea 30a…Sea level (sea level) 31…ground 32... Hole (boring) 33…bottom 34… Earth surface (ground surface, ground, ocean floor) 35… Undersea H … epicenter Va, Vb, Vc... Electromagnetic wave amplitude ra, rb, rc...distance from the epicenter to the electromagnetic wave sensing part

Claims

1. An earthquake detection system for detecting an earthquake, The system is provided with an electromagnetic wave sensing part that senses electromagnetic waves of the primary destruction that occurs before the occurrence of an earthquake, and an electromagnetic wave measuring device that measures the amplitude and the time of sensing of the electromagnetic waves sensed by the electromagnetic wave sensing part, A plurality of the electromagnetic wave sensing parts are arranged at separate positions, An earthquake detection system characterized in that the electromagnetic wave measuring device identifies the epicenter by performing calculations based on the amplitude of the electromagnetic waves detected by at least three of the electromagnetic wave sensing portions.

2. 2. The earthquake detection system of claim 1, An earthquake detection system characterized in that the electromagnetic wave sensing part is located either on the seabed, underwater, on the sea surface, on the ground, or at the bottom of a hole drilled from the earth's surface including the seabed and the ground.

3. 3. The earthquake detection system according to claim 1 or 2, The electromagnetic wave measuring device measures the electromagnetic waves detected by the electromagnetic wave detecting portion and performs arithmetic processing to predict the magnitude of an earthquake.

4. 3. The earthquake detection system according to claim 1 or 2, An earthquake detection system characterized in that at least the upper part of the electromagnetic wave sensing part is covered with an electromagnetic wave blocking material, and it senses the electromagnetic waves of the primary destruction that occurs before an earthquake occurs without being affected by disturbing electromagnetic waves from the ground.

5. 3. The earthquake detection system according to claim 1 or 2, The electromagnetic wave sensing portion is disposed on the seabed or in the sea, An earthquake detection system characterized in that the electromagnetic wave sensing portion is located at a depth of 60 m or more below sea level.

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