Observation signal amplitude measurement method based on natural seismic source radiation intensity correction

A technology of radiation intensity and measurement method, applied in seismic signal processing, geophysical measurement, seismology, etc., can solve problems such as difficult-to-record signal amplitude measurement, and achieve the effect of increasing accuracy and saving costs

Active Publication Date: 2021-09-07
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the impact of the directionality of the intensity of the seismic source, which makes it difficult to use the recorded signal of a large-magnitude natural earthquake on the seismic station to perform amplitude measurement, so as to establish the seismic signal amplitude of the specific path from the seismic source to the seismic station—— In order to solve the problem of the magnitude relationship model, a method for measuring the amplitude of the observed signal based on the correction of the radiation intensity of the natural earthquake source is provided.

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  • Observation signal amplitude measurement method based on natural seismic source radiation intensity correction
  • Observation signal amplitude measurement method based on natural seismic source radiation intensity correction
  • Observation signal amplitude measurement method based on natural seismic source radiation intensity correction

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Embodiment Construction

[0050] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0051] Taking a natural earthquake event in Northwest Iran at 2015 / 10 / 29 09:46:42 (N39.08°, E43.81°) at the three seismic stations SENK, VRTB and SIRT about 1.9° from the epicenter of the event Taking signal amplitude measurement as an example, the distribution of seismic events and seismic stations is as follows figure 1 shown.

[0052] Using the observation signal amplitude measurement method based on natural earthquake source radiation intensity correction provided by the present invention, the specific implementation steps are as follows:

[0053] 1) The original waveform records of this earthquake at the three seismic stations SENK, VRTB and SIRT are shown in 2; the original waveform data recorded at the three seismic stations with count as the intensity unit are removed from the instrument response, and the following is obtained: Wave...

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Abstract

The invention relates to an observation signal amplitude measurement method based on natural seismic source radiation intensity correction, and aims to solve the problem that the amplitude measurement is difficult to perform by using a recording signal of a large-magnitude natural earthquake on a seismic station due to the influence of the intensity directivity of a seismic source, and a seismic signal amplitude-magnitude relation model of a specific path from a seismic source to a seismic station is difficult to establish. The method is based on a known seismic source mechanism of a natural earthquake, a theoretical seismic map is generated by using a theoretical seismic map calculation method, a theoretical seismic map waveform containing a plurality of path arrival signals is obtained, and a plurality of path arrival signals are obtained by measuring an average value of the theoretical seismic maps of different azimuth angles and measuring a theoretical seismic map signal amplitude on a seismic station. And the average value is normalized to obtain an amplitude correction coefficient corresponding to the seismic station so as to correct the radiation intensity of the seismic source.

Description

technical field [0001] The invention relates to a method for measuring the amplitude of observation signals based on the correction of the radiation intensity of natural earthquake sources. Background technique [0002] The seismic signal amplitude-magnitude relationship model of a specific path between the seismic station and the epicenter is the basis for evaluating the detection probability of seismic signals of different magnitudes at the epicenter by the seismic station based on the statistical model of the background noise of the seismic station. When building the model, it is necessary to avoid the influence of seismic source radiation patterns on the modeling results. Therefore, the commonly used modeling method is to use the recorded signals of underground explosions on seismic stations for amplitude measurement. However, due to the scarcity and uneven distribution of seismic signal records of underground explosions, especially those with large magnitudes (greater t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/307
Inventor 王红春薛方正徐雄
Owner NORTHWEST INST OF NUCLEAR TECH
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