Detection of Quarry Blasts in the Koyna-Warna Region, Western India

DOI: 10.4236/ojer.2014.34016   PDF   HTML   XML   4,033 Downloads   4,600 Views   Citations

Abstract

Koyna-Warna is a seismically active region, characterized by earthquakes triggered by loading of artificial water reservoirs. In this region quarrying is ongoing and sometimes the quarry blasts are confused with triggered seismic events. About 410 events around a known mining area were ob-served during January 2007-October 2013. In general the quarry blasts are carried out mostly during the day time. Based on this fact a well known method of [1] is implemented, which has the capability of detecting the areas of quarry blast activity. Also, discrimination of quarry blasts from earthquakes has been achieved by studying waveforms at key seismic stations located close to the quarrying area. Further, distinction is achieved through spectral analysis in the frequency band of 3 - 15 Hz. Ratio of day-time to night-time events, waveform pattern and spectral analysis approach confirm the presence of quarry blasts aligned south-east of the Warna reservoir.

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Shashidhar, D. , Mallika, K. , Rao, N. , Satyanarayana, H. and Gupta, H. (2014) Detection of Quarry Blasts in the Koyna-Warna Region, Western India. Open Journal of Earthquake Research, 3, 162-169. doi: 10.4236/ojer.2014.34016.

Conflicts of Interest

The authors declare no conflicts of interest.

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