[1]WANG Tongli,CUI Bowen,WANG Lihong,et al.Temporal and Spatial Evolution of the Apparent Resistivity before and after the 2008 Wenchuan MS8.0 Earthquake[J].Journal of Seismological Research,2022,45(01):66-74.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0008
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Temporal and Spatial Evolution of the Apparent Resistivity before and after the 2008 Wenchuan MS8.0 Earthquake
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
45
Number of periods:
2022 01
Page number:
66-74
Column:
Public date:
2022-01-20
- Title:
- Temporal and Spatial Evolution of the Apparent Resistivity before and after the 2008 Wenchuan MS8.0 Earthquake
- Keywords:
- the Wenchuan MS8.0 earthquake; apparent resistivity; time sequential analysis; spatial distribution; the Normalized Variation Rate method
- CLC:
- P315.722
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2022.0008
- Abstract:
- In this paper,the Normalized Variation Rate method is used to analyze the sequential and spatial variation of the apparent resistivity observed by 19 stations around the Wenchuan MS8.0 earthquake.The sequential analysis shows that some of the earthquake stations had quasi-synchronously recorded the short- and medium-term precursory anomalies of the apparent resistivity before the Wenchuan earthquake.The spatial analysis shows that in the epicentral region,the negative anomalies of the apparent resistivity had been featured with a strip distribution and with a migration from far to near before the earthquake.The cluster of the anomalies displayed a quadrant pattern,whose long axis was consistent with the direction of principal compressive stress of the focal mechanism solution.The seismogenic fault,the station location,and the layout direction of the observational instruments also influenced the distribution direction of the long axis of the precursory anomalies.
- References:
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Last Update:
2022-01-20