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1.
Jiang Xianghu Wang Yue Han Yanyan Xue Yan Yang Wen Zang Yang Deng Shiguang Ma Yawei Yao Qi Song Jin Shi Haixi Zhang Xiaotao Meng Lingyuan Zhou Longquan 《中国地震研究》2018,32(1):141-149
正1 SURVEY OF GLOBAL SEISMICITY A total of 8 strong earthquakes with M_S≥7.0 occurred in 2017(from January 1 to December31,2017)throughout the world,according to the China Seismic Network,including one with M_S≥8.0,i.e.,the great earthquake with M_S8.2 which occurred on September 8,2017 in 相似文献
2.
《中国地震研究》2016,(1)
正1 SURVEY OF GLOBAL SEISMICITY A total of 20 strong earthquakes with M_S≥7.0 occurred in 2015 throughout the world according to the China Seismic Network(Table 1),including three strong earthquakes with M_S8.0,i.e.,the Nepal strong earthquake with M_S8.1 on April 25,the M_S8.0 earthquake in Ogasawara Islands region on May 30 and the M_S8.2 earthquake in the middle of Chile offshore 相似文献
3.
<正>1 SURVEY OF GLOBAL SEISMICITY IN 2006A total of 15 strong earthquakes with M_S≥7.0 occurred in the world according to the Chinese Seismic Station Network in 2006 (Table 1). The strongest earthquakes were the Kamchatka earthquake with M_S8.0 on March 29 and the Kuril Islands earthquake with M_S8.0 on November 15 (Fig.1). 相似文献
4.
《中国地震研究》2007,(1)
1 SURVEY OF GLOBAL SEISMICITY IN 2006A total of 15 strong earthquakes with M_S≥7.0 occurred in the world according to the Chinese Seismic Station Network in 2006 (Table 1). The strongest earthquakes were the Kamchatka earthquake with M_S8.0 on March 29 and the Kuril Islands earthquake with M_S8.0 on November 15 (Fig.1). 相似文献
5.
Kateline Young 《地震学报(英文版)》2011,(2):199-206
The 2009 M W 7.8 Fiordland (New Zealand) earthquake is the largest to have occurred in New Zealand since the 1931 M W 7.8 Hawke’s Bay earthquake, 1 000 km to the northwest. In this paper two tracks of ALOS PALSAR interferograms (one ascending and one descending) are used to determine fault geometry and slip distribution of this large earthquake. Modeling the event as dislocation in an elastic half-space suggests that the earthquake resulted from slip on a SSW-NNE orientated thrust fault that is associated w... 相似文献
6.
The reason for the failure to forecast the Wenchuan M_S8.0 earthquake is under study, based on the systematically collection of the seismicity anomalies and their analysis results from annual earthquake tendency forecasts between the 2001 Western Kunlun Mountains Pass M_S8.1 earthquake and the 2008 Wenchuan M_S8.0 earthquake. The results show that the earthquake tendency estimation of Chinese Mainland is for strong earthquakes to occur in the active stage, and that there is still potential for the occurrence of a M_S8.0 large earthquake in Chinese Mainland after the 2001 Western Kunlun Mountains Pass earthquake. However the phenomena that many large earthquakes occurred around Chinese Mainland, and the 6-year long quietude of M_S7.0 earthquake and an obvious quietude of M_S5.0 and M_S6.0 earthquakes during 2002～2007 led to the distinctly lower forecast estimation of earthquake tendency in Chinese Mainland after 2006. The middle part in the north-south seismic belt has been designated a seismic risk area of strong earthquake in recent years, but, the estimation of the risk degree in Southwestern China is insufficient after the Ning’er M_S6.4 earthquake in Yunnan in 2007. There are no records of earthquakes with M_S≥7.0 in the Longmenshan fault, which is one of reasons that this fault was not considered a seismic risk area of strong earthquakes in recent years. 相似文献
7.
We have studied the seismicity features of M_S≥5.0 earthquakes two years before strong earthquakes with M_S≥7.0 occurred in the central-northern Qinghai-Xizang (Tibet) block since 1920. The results have showed that there is an obvious gap or quiescence of M_S5.0～6.9 earthquakes near epicenters. We have also studied statistical seismicity parameters of M_S5.0～6.9 earthquakes in the same region since 1950. The results have showed that earthquakes with M_S≥7.0 occurred when earthquake frequency is relatively high and earthquake time, space accumulation degrees are rising. And the prediction effect R value scores are between 0.4～0.7. We have concluded that, before earthquakes with M_S≥7.0 in the central-northern Qinghai-Xizang (Tibet) block, M_S5.0～6.0 earthquake activity in the whole area increased and accumulated in time and space, but earthquakes with M_S≥7.0 occurred where M_S5.0～6.0 earthquake activity was relatively quiet. 相似文献
8.
LiGang LiuJie YuSurong QinDongling 《中国地震研究》2004,18(1):97-104
In 2003, a total of 20 strong earthquakes with Ms7.0 occurred in the world as determined by the Chinese Seismic Station Network (Table 1). The strongest one was the Hokkaido earthquake with Ms=8.0 on September 26 (Fig. 1). When compared with 2002, the frequency and energy release of earthquakes in 2003 increased obviously. The characteristics of activity of global earthquakes with Ms7.0 will be discussed here. 相似文献
9.
《中国地震研究》2016,(1)
The Qianguo M_S5. 8 earthquake swarm of 2013 occurred in Qianguo,Jilin Province,China. There are five earthquakes with M_S≥5. 0 in the Qianguo earthquake swarm,with magnitudes of M_S5. 5,M_S5. 0,M_S5. 3,M_S5. 8 and M_S5. 0. In this study,the far-field seismic radiated energy characteristics of the earthquakes are compared based on the source spectrum and the ground motion spectrum of the earthquake swarm. The ground motion spectrum of the five earthquakes at Changchun seismic station( CN2),which is the national standard station,is first investigated with the recorded ground motions,and then the far-field seismic radiated energy is calculated and combined with the relationships of the source spectrum to describe the variable characteristics of the Qianguo earthquake swarm. Research results indicate that the second earthquake( No. 2) with M_S5. 0 is the key event of the earthquake swarm,which occurred on October 31,the same day following the first M_S5. 5 earthquake( No.1). In fact,the magnitude of event No. 2 decreased compared to event No.1,which did not agree with its large far-field seismic radiated energy. It needs to be pointed out that event No. 2 was the turning point event of the Qianguo earthquake swarm,as being a significant transition before the largest M_S5. 8 earthquake. 相似文献
10.
AbstractThe relation between the gravity variation features and M_S=8.1 earthquake in Qinghai-Xizang monitoring area isanalyzed preliminarily,by using spatial dynamic variation results of regional gravity field from absolute gravityand relative gravity observation in 1998 and 2000.The results show that:1)M_S=8.1 earthquake in Kulun mountainpass western occurred in the gravity variation high gradient near gravity's high negative variation; 2)The maintectonic deformation and energy accumulation before M_S=8.1 earthquake are distributed at south side of theepicenter;3)The range of gravity’s high negative variation at east of the M_s=8.1 earthquake epicenter relativelycoincides with that rupture region according to field geology investigation; 4)Gravity variation distribution in highnegative value region is just consistent with the second shear strain’s high value region of strain field obtainedfrom GPS observation. 相似文献