Earthquake sensor, earthquake detection method, and earthquake detection program

Abstract

To provide a seismic sensor, an earthquake detection method, and an earthquake detection program with which it is possible to determine, with high accuracy, whether or not there is occurrence of an earthquake.SOLUTION: A seismic sensor 10 comprises an acceleration acquisition unit 21, an acceleration waveform generation unit 22, a frequency detection unit 24, and an earthquake determination unit 25. The acceleration acquisition unit 21 detects vibration and measures the acceleration of vibration. The acceleration waveform generation unit 22 generates an acceleration waveform that indicates a relationship between the acceleration measured by the acceleration acquisition unit 21 and an elapsed time. The frequency detection unit 24 detects the frequency of the acceleration waveform generated by the acceleration waveform generation unit 22. The earthquake determination unit 25 classifies between an acceleration waveform whose frequency detected by the frequency detection unit 24 is larger than a prescribed threshold and an acceleration waveform whose frequency is smaller than the prescribed threshold, and determines, excluding the acceleration waveform whose frequency is larger than the prescribed threshold, whether or not being an earthquake.SELECTED DRAWING: Figure 2

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