Seismicity patterns associated with the September 10th, 2008 Qeshm earthquake, South Iran

被引：9

作者：

Sorbi, Mohammad Reza ^{[1
]}

Nilfouroushan, Faramarz ^{[2
]}

Zamani, Ahmad ^{[1
]}

机构：

[1] Shiraz Univ, Dept Earth Sci, Coll Sci, Shiraz, Iran

[2] Uppsala Univ, Dept Earth Sci, S-75236 Uppsala, Sweden

来源：

INTERNATIONAL JOURNAL OF EARTH SCIENCES | 2012年 / 101卷 / 08期

关键词：

Seismicity patterns; b value; Z value; Qeshm earthquake; Earthquake precursors; B-VALUE ANOMALIES; ZAGROS MOUNTAINS; SPATIAL-DISTRIBUTION; THRUST BELT; QUIESCENCE; VALUES; DEFORMATION; MAGNITUDE; JAPAN; COMPLETENESS;

D O I：

10.1007/s00531-012-0771-6

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The b value of the Gutenberg-Richter relation and the standard deviate, Z, were calculated to investigate the temporal and spatial variations in seismicity patterns associated with the September 10th, 2008 (Mw = 6.1) Qeshm earthquake. The temporal variations of b value illustrate a distinct dramatic drop preceding the Qeshm earthquake, and the spatial changes in b value highlight a zone with an abnormally low b value around the epicenter of this event. The cumulative number and Z value as a function of time show a precursory seismic quiescence preceding the 2008 Qeshm earthquake that observed for 1 year in a circle with R = 50 km around its epicenter. The spatial distribution map of the standard deviate, Z, also exhibits an obvious precursory seismic quiescence region before the 2008 Qeshm event around the epicenter of this event. Interestingly, the precursory seismic quiescence region is approximately consistent with low b value anomaly region, and both have E-W to NE-SW trend. These two precursory anomalies took place in relatively large regions, which were possibly relevant to the preparation zone of the 2008 Qeshm event.

引用

页码：2215 / 2223

页数：9

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