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Acta Geodynamica et Geomaterialia

 
Title: FAST DETERMINATION OF ATTENUATION FROM MICROSEISMICITY FOR LARGE DATASETS
 
Authors: Wcislo Milosz and Eisner Leo
 
DOI: 10.13168/AGG.2019.0022
 
Journal: Acta Geodynamica et Geomaterialia, Vol. 16, No. 3 (195), Prague 2019
 
Full Text: PDF file (1.2 MB)
 
Keywords: Seismic attenuation, body waves, induced seismicity, Fourier analysis
 
Abstract: We develop a robust and automatic determination of peak frequencies of direct wave arrivals from microseismic events using mirror image of the recorded signal. These peak frequencies can be then used to evaluate attenuation quality factor (Q). We propose to use procedure that consists of automatic determination of the peak frequencies in combination with matched filter to facilitate selection of suitable events. Using both natural and induced seismicity datasets, we show that matched filter detection along with automatic determination of the peak frequencies gives consistent values of quality factor when compared with manual processing. Proposed technique significantly reduces processing time making it a suitable tool in attenuation analysis of large datasets.