| The identification and criteria of short-term seismicity gap before a great earthquake |
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| 引用本文： | 曹井泉,孙加林,杨毅.The identification and criteria of short-term seismicity gap before a great earthquake[J].地震学报(英文版),1997,10(1):43-51. |
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| 作者姓名： | 曹井泉 孙加林 杨毅 |
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| 作者单位： | JING QUANCAO(曹井泉) JIA LINSUN(孙加林) YIYANG(杨 毅)Seismological Bureau of Inner Mongolia，Hohhot，010051，China |
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| 摘 要： | ＴｈｅｉｄｅｎｔｉｆｉｃａｔｉｏｎａｎｄｃｒｉｔｅｒｉａｏｆｓｈｏｒｔｔｅｒｍｓｅｉｓｍｉｃｉｔｙｇａｐｂｅｆｏｒｅａｇｒｅａｔｅａｒｔｈｑｕａｋｅＪＩＮＧＱＵＡＮＣＡＯ（曹井泉）ＪＩＡＬＩＮＳＵＮ（孙加林）ＹＩＹＡＮＧ（杨毅）Ｓｅｉｓｍｏｌ...
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| 收稿时间： | 27 May 1995 |
| 修稿时间： | 21 November 1995 |
The identification and criteria of short-term seismicity gap before a great earthquake |
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| Jing-Quan Cao, Jia-Lin Sun and Yi Yang.The identification and criteria of short-term seismicity gap before a great earthquake[J].Acta Seismologica Sinica(English Edition),1997,10(1):43-51. |
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| Authors: | Jing-Quan Cao Jia-Lin Sun and Yi Yang |
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| Institution: | (1) Seismological Bureau of Inner Mongolia, 010051 Hohhot, China |
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| Abstract: | Based on the background of the medium-term seismic gap, and the creep rate slow down after accelerated strain release, by
using a method of gradually reducing the step length and the window length of scanning, the characteristics and criteria of
a short-term seismic gap have been studied from multi-dimension space research. A new method for identifying a short-term
gap from 3-D axial stability collation has been advanced.
Through the study of 26 earthquake examples in north and south-west region of China, we found that a short-term seismicity
gap appeared in 9–16 months before a strong earthquake, this type of gap is different from the seismogenic gap, and will lasted
4–7 months, end at the time of 3–8 months before the mainshock. The ending is marked by the appearance of a significant earthquake
in or near the gap (Sun and Cao, 1995) and of small earthquake in the gap. |
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| Keywords: | short term gap 3 D axes identification stability collation criterion |
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