[1]ZENG Xianwei,LUO Hengzhi,ZHU Pengtao,et al.Discovery and Research of “Earthquake Events” with Very Low Apparent Stress[J].Journal of Seismological Research,2019,42(01):11-19.
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Discovery and Research of “Earthquake Events” with Very Low Apparent Stress
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
42
Number of periods:
2019 01
Page number:
11-19
Column:
Public date:
2019-04-20
- Title:
- Discovery and Research of “Earthquake Events” with Very Low Apparent Stress
- Keywords:
- apparent stress; blasting events; waveform cross-correlation; spectral component ratio of wavelet-packet
- CLC:
- P315.727
- DOI:
- -
- Abstract:
- We calculate the apparent stress of moderate and small earthquakes in Ningxia area and find that the apparent stress values of some events decrease multiply relative to other events of the same magnitude. Combined with the occurrence time and epicenter of the events,we initially identified these abnormal events as doubtful blasting events. Then,by analyzing the P-wave initial moving direction,waveform cross-correlation and energy ratio of different frequency bands etc.,we find that these abnormal events have some common features,such as the vertical initial motion of P wave is upward,the correlation coefficients of waveforms in the same region recorded by the same station are larger,and the low frequency signals of waveforms are more developed. Basis on it,we confirm that these abnormal events should be blasting events.
- References:
- -
- Similar References:
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Last Update:
2019-04-25