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Microseismic Monitoring Using Seismic Mini-Array

소규모 배열식 지진관측소를 이용한 미소지진 관측

  • Received : 2013.01.24
  • Accepted : 2013.01.30
  • Published : 2013.02.28

Abstract

It was introduced a seismic mini-array that could monitor microseismicity efficiently and analyzed seismic data obtained from the mini-array that was operated from December 19, 2012 to January 9, 2013. The mini-array consisted of a six channel data logger, a central 3 components seismometer, and a tripartite array of vertical sensors centered around the 3 components seismometer as an equilateral triangle with about 100 m aperture. All seismometers that had the same instrument response were connected a 6 channel data logger, which was set to record seismograms at a sampling rate of 200 sps. During the three weeks of campaign, a total of 16 microearthquakes were detected. Using time differences of P wave arrivals from the vertical components, S-P time from 3 components seismometers, and back azimuth from the seismic array analysis, it was possible to locate the hypocenter of the microearthquake even with one seismic miniarray. The epicenters of two nearest microearthquakes were a quarry site located 1.3 km from the mini-array. The records of quarry blasting confirmed the our analysis.

Keywords

seismic array;microseismic monitoring

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Cited by

  1. Study on Microseismic Data Acquisition and Survey Design through Field Experiments of Hydraulic Fracturing and Artificial Blasting vol.18, pp.4, 2015, https://doi.org/10.7582/GGE.2015.18.4.197

Acknowledgement

Supported by : 기상기술개발관리단