The seismic P wave detection method according to an embodiment of the present invention includes the steps of receiving acceleration data obtained from a seismometer, and impact momentum average variations based on acceleration data in order to distinguish noise and seismic motion from the received acceleration data. , IMAV), calculating the instantaneous mean and instantaneous standard deviation according to iterative calculation from the average change of the impact driving force, calculating the threshold according to the calculated instantaneous average and instantaneous standard deviation, and the average change of the impact driving force It may include the step of detecting the seismic P wave according to whether or not the value is maintained for a preset reference time as a value equal to or greater than the calculated threshold value.
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