[1]LIU Xiang,WU Guo-hua,FU Hong,et al.Characteristics of Strong Earthquake Activity in Northwest Yunnan and Study on Short-term Earthquake Precursor[J].Journal of Seismological Research,2010,33(01):7-13.
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Characteristics of Strong Earthquake Activity in Northwest Yunnan and Study on Short-term Earthquake Precursor
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
33
Number of periods:
2010 01
Page number:
7-13
Column:
Public date:
2010-01-01
- Title:
- Characteristics of Strong Earthquake Activity in Northwest Yunnan and Study on Short-term Earthquake Precursor
- Keywords:
- strong motion earthquake; earthquake precursor; short term; supporting
- CLC:
- P315.75
- DOI:
- -
- Abstract:
- Based on the historical earthquake data, we study the rhythm of strong seismicity in Northwest Yunnan and get the medium-sized earthquake space evolution images in the neighboring region of epicenters before the M≥6.0 strong quakes occurred in Northwest Yunnan over the past decade. According to the M≥5.0 strong quakes since 1986, we study the activity and equability anomaly of the M≥3.0 or M≥4.0 earthquakes, and the M≥3.0 clusters. The index of short precursor of strong earthquake in northwest Yunnan is given quantitatively. The main results show:(1)before the M≥6.0 quakes occurred in Northwest Yunnan, the M≥4.0 were in equability and M≥3.0 were in activity, the MS3.0 quakes around the potential epicenter were in activity, so the abnormal images of orderly distribution of seismic activity were given including the obvious band, void and intensive areas;(2)the integrated forecasting index Y of the quakes above 6 in short term anomaly in Northwest Yunnan is equal to or greater than 0.5. There are two types of short term precursor model; type one, the anomaly of activity of earthquakes with M≥3.0 appear synchronously with the clusters of earthquakes with 3.0≥M≥4.0. Type two, in the process of the tranquility of the M≥4.0 earthquakes, there are intermittent tranquility of M≥3.0 earthquakes.
- References:
- -
- Similar References:
Memo
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Last Update:
2010-01-23