Using Dynamic Fourier Analysis to Discriminate Between Seismic Signals from Natural Earthquakes and Mining Explosions

Maria C. Mariani; Hector Gonzalez-Huizar; Masum Md Al Bhuiyan; Osei K. Tweneboah; Maria C. Mariani; Hector Gonzalez-Huizar; Masum Md Al Bhuiyan; Osei K. Tweneboah

doi:10.3934/geosci.2017.3.438

AIMS Geosciences

2017, Volume 3, Issue 3: 438-449. doi: 10.3934/geosci.2017.3.438

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Research article

Using Dynamic Fourier Analysis to Discriminate Between Seismic Signals from Natural Earthquakes and Mining Explosions

1.
Department of Mathematical Sciences, University of Texas at El Paso, El Paso, Texas, 79968-0514, USA
2.
Department of Geological Sciences, University of Texas at El Paso, El Paso, Texas, 79968-0514, USA
3.
Computational Science Program, University of Texas at El Paso, El Paso, Texas, 79968-0514, USA

Received: 10 May 2017 Accepted: 10 August 2017 Published: 22 August 2017

A sequence of intraplate earthquakes occurred in Arizona at the same location where mining explosions were carried out in previous years. The explosions and some of the earthquakes generated very similar seismic signals. In this study Dynamic Fourier Analysis is used for discriminating signals originating from natural earthquakes and mining explosions. Frequency analysis of seismograms recorded at regional distances shows that compared with the mining explosions the earthquake signals have larger amplitudes in the frequency interval ~ 6 to 8 Hz and significantly smaller amplitudes in the frequency interval ~ 2 to 4 Hz. This type of analysis permits identifying characteristics in the seismograms frequency yielding to detect potentially risky seismic events.
- Dynamic Fourier Analysis,
- Fast Fourier Transform,
- intraplate earthquakes,
- mining explosions,
- Arizona earthquakes
Citation: Maria C. Mariani, Hector Gonzalez-Huizar, Masum Md Al Bhuiyan, Osei K. Tweneboah. Using Dynamic Fourier Analysis to Discriminate Between Seismic Signals from Natural Earthquakes and Mining Explosions[J]. AIMS Geosciences, 2017, 3(3): 438-449. doi: 10.3934/geosci.2017.3.438

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Abstract

A sequence of intraplate earthquakes occurred in Arizona at the same location where mining explosions were carried out in previous years. The explosions and some of the earthquakes generated very similar seismic signals. In this study Dynamic Fourier Analysis is used for discriminating signals originating from natural earthquakes and mining explosions. Frequency analysis of seismograms recorded at regional distances shows that compared with the mining explosions the earthquake signals have larger amplitudes in the frequency interval ~ 6 to 8 Hz and significantly smaller amplitudes in the frequency interval ~ 2 to 4 Hz. This type of analysis permits identifying characteristics in the seismograms frequency yielding to detect potentially risky seismic events.

References

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