Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (June, 2001～July,2001)

~~Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (June, 2001～July,2001)@陈培善     

A discussion on Corioli force effect and aftershock activity tendency of the M=8.1 Kunlun Mountain Pass earthquake on Nov. 14, 2001

Introduction An M=8.1 earthquake occurred to the west of the Kunlun Mountain Pass on November 14, 2001 (Kunlun Mountain earthquake for short). It is the largest earthquake during the latest 50 years in Chinese mainland since the 1951 Dangxiong, Tibet M=8.0 earthquake, and it broke the status that there had not occurred any M7.0 earthquake during the subsequent 4 years since the 1997 Mani, Tibet M=7.5 earthquake. Hereafter, the preparation and evolution process of large earthquakes, the v…     

Spatial and temporal rupture process of the January 26, 2001, Gujarat, India, M_S=7.8 earthquake

Introduction An earthquake of MS=7.8 occurred near the Gujarat of India on January 26, 2001, which was one of the most deadly earthquakes since there was the record in the Indian history (Bendick, et al, 2001; Gupta, et al, 2001). The USGS of USA determined the origin time of the earthquake to be 3h16min41s (UTC), and the epicenter location to be 70.32篍, 23.40篘. Shortly after the earthquake, the moment tensor solutions or focal mechanisms and other related parameters were offered by s…     

A discussion on Corioli force effect and aflershock activity tendency of the M=8.1 Kunlun Mountain Pass earthquake on Nov.14, 2001

Following the theory and definition of the Corioli force in physics, the Corioli force at the site of the M=8.1 Kunlun Mountain Pass earthquake on November 14, 2001, is examined in this paper on the basis of a statistical research on relationship between the Corioli force effect and the maximum attershock magnitude of 20 earth-quakes with M≥7.5 in Chinese mainland, and then the variation tendency of attershock activity of the M=8.1 earthquake is discussed. The result shows: a) Analyzing the Corioli force effect is an effective method to predict maximum attershock magnitude of large earthquakes in Chinese mainland. For the sinistral slip fault and the reverse fault with its hanging wall moving toward the right side oftbe cross-focus meridian plane, their Corioli force pulls the two fault walls apart, decreasing frictional resistance on fault plane during the fault movement and releasing elastic energy of the mainshock fully, so the maximum magnitude of aftershocks would be low. For the dextral slip fault, its Corioli force presses the two walls against each other and increases the frictional resistance on fault plane, prohibiting energy release of the mainshock, so the maximum magnitude of attershocks would be high.b) The fault of the M--8. l Kunlun Mountain earthquake on Nov. 14, 2001 is essentially a sinistral strike-slip fault,and the Corioli force pulled the two fault walls apart. Magnitude of the induced stress is about 0.06 MPa. Alter a comparison analysis, we suggest that the attershock activity level will not be high in the late period of this earth-quake sequence, and the maximum magnitude of the whole aftershocks sequence is estimated to be about 6.0.     

Changes in source parameters of foreshocks and aftershocks of the 2001 M_S=6.0 Yajiang, Sichuan, earthquake

Introduction An MS=6.0 earthquake occurred on February 23, 2001 in Yajiang county, Sichuan Province. The earthquake is located on the east of the southeast segment of the Litang-Dewu fault with strike of NW. Before the event, on February 14, an MS=5.0 earthquake took place nearly in the same place. In 1948 an MS=7.3 earthquake occurred on the northwestern segment of the Litang fault. The length of the surface rupture belt caused by the earthquake is 70 km, which extended from Litang to…     

The November 14, 2001 west of Kunlun Mountain Pass earthquake: An earthquake with unsaturated surface wave magnitude

Introduction According to the Rapid Earthquake Information Release of CNDSN (Department of Earth- quake Monitoring and Prediction, China Earthquake Administration, 2002), an earthquake with surface wave magnitude MS=8.1 shook west of Kunlun Mountain Pass (KMP) at the juncture of Xinjiang, Qinghai and Xizang on November 14, 2001. This is the largest and the only MS>8.0 earthquake in Chinese mainland over 50 years since the August 15, 1950 MS=8.6 (MW=8.6) Chayuearthquake in Tibeta…     

The middle-long term prediction of the February 3, 1996 Lijiang earthquake (MS=7) by the "criterion of activity in quiescence"

IntroductionIn the book Future CataS~ologr published in 1992, we proposed a viewpoiflt on using the"criterion of activity in quiescence" to predict big eathquake (MsZ7) (GUO, et al, 1992), and predicted in the book that in futore several years or in ten years a big earthquake (Ms27) will be possible to occur in the Zhongdian and nearby in Yunnan Province. In the 1994 nation-wide earthquake tendency consultation meeting we pointed out, once more, in the Zhongdian region of Yunnan Province…     

Seismicity anomalies before the great earthquake of M_S=8.1 in the Kunlun Pass and its significance to earthquake prediction

Introduction The MS=8.1 earthquake occurred in west of the Kunlun Pass on November 14, 2001. It is the greatest earthquake occurred in China since the last half of the century and is an important event in recent seismic history of China. Some specialists consider that the earthquake occurred in the area where the earthquake monitoring capability is lowest in Chinese mainland; no striking precursory seismicity was found. The study on the precursory seismicity before the earthquake has not b…     

Discussion on the feature of strong earthquake: Orderly distribution in time, space and intensity before the Western Kunlun Mountain Pass M=8.1 earthquake

Introduction The Western Kunlun Mountain Pass M=8.1 earthquake occurred on November 14, 2001 is the other M=8 earthquake occurred 50 years after Dangxiong, Tibet M=8.0 earthquake in Chinese mainland. The earthquake has caused the attention of the seismologists in the following aspects: 1) The fracture length is more than 400 km, which is far away from the estimated length by the statistic empirical function between the magnitude and the fracture length (WANG, et al, 2002); 2) The aftersh…     

Horizontal crustal movement in Chinese mainland before and after the great Kunlun Mountain M=8.1 earthquake in 2001

Introduction The great Kunlun Mountain earthquake occurred on November 14, 2001 on the border be-tween Xinjiang and Qinghai in west China (36.2N, 90.9E). It was the largest earthquake oc-curred in Chinese mainland in the last 50 years. The Crustal Movement Observation Network of China (CMONOC) established in 1998 mainly for the purpose of earthquake prediction with only 25 fiducial stations for continuous GPS observations, has recorded the precious information of the crustal movement …     

Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (February, 2001 ~ March, 2001)

All the data in this catalog are chosen from the (Preliminary Seismological Report of Chinese Seismic Stations( (Its abbreviation is (Monthly Report(). The catalog includes the events of M(4.7 in and near China and M(6 all over the world. The (Monthly Report( is monthly compiled by the Ninth Section of Institute of Geophysics, CSB.The origin times of earthquakes in the catalog adopt coordinated universal time (UTC) in accordance with international convention. The location of every ep…     

Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (August, 2001 ~September, 2001)

Illustration All the data in this catalog are chosen from the Preliminary Seismological Report of Chinese Seismic Stations (Its abbreviation is Monthly Report). The catalog includes the events of M4.7 in and near China and M6 all over the world. The Monthly Report is monthly compiled by the Ninth Section of Institute of Geophysics, CSB. The origin times of earthquakes in the catalog adopt coordinated universal time (UTC) in accordance with international convention. The location of ev…     

Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (December, 2001～January, 2002)

Illustration All the data in this catalog are chosen from the Preliminary Seismological Report of Chinese Seismic Stations (Its abbreviation is Monthly Report). The catalog includes the events of M4.7 in and near China and M6 all over the world. The Monthly Report is monthly compiled by the Ninth Section of Institute of Geophysics, CSB. The origin times of earthquakes in the catalog adopt coordinated universal time (UTC) in accordance with international convention. The location of ev…     

Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (June, 2004～July, 2004)

Illustration All the data in this catalog are chosen from the ″Preliminary Seismological Report of Chi-nese Seismic Stations″ (Its abbreviation is ″Monthly Report″). The catalog includes the events ofM≥4.7 in and near China and M≥6 all over the world. The ″Monthly Report″ is monthly compiledby the Seventh Section of Institute of Geophysics, China Earthquake Administration. The origin times of earthquakes in the catalog adopt coordinated universal time (UTC) inaccord…     

Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (April, 2003 ~ May, 2003)

Illustration All the data in this catalog are chosen from the "Preliminary Seismological Report of Chinese Seismic Stations" (Its abbreviation is "Monthly Report"). The catalog includes the events of M≥4.7 in and near China and M≥6 all over the world. The "Monthly Report" is monthly compiled by the Ninth Section of Institute of Geophysics, CSB.     

Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (December, 1998 ( January, 1999)

Illustration All the data in this catalogue are chosen from the (Preliminary Seismological Report of Chinese Seismic Stations" (Its abbreviation is "Monthly Report"). The catalogue includes the events of M 4.7 in and near China and M 6 all over the world. The "Monthly Report" is monthly compiled by the Ninth Section of Institute of Geophysics, CSB.     

Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (Febraury, 2004～March, 2004)

Illustration All the data in this catalog are chosen from the Preliminary Seismological Report of Chi-nese Seismic Stations (Its abbreviation is Monthly Report). The catalog includes the events of M4.7 in and near China and M6 all over the world. The Monthly Report is monthly compiled by the Ninth Section of Institute of Geophysics, China Earthquake Administration. The origin times of earthquakes in the catalog adopt coordinated universal time (UTC) in accordance with international c…     

Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China(February,2002~March,2002)

Illustration All the data in this catalog are chosen from the Preliminary Seismological Report of Chinese Seismic Stations (Its abbreviation is Monthly Report). The catalog includes the events of M4.7 in and near China and M6 all over the world. The Monthly Report is monthly compiled by the Ninth Section of Institute of Geophysics, CSB. The origin times of earthquakes in the catalog adopt coordinated universal time (UTC) in accordance with international convention. The location of ev…     

Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (June, 2005～July, 2005)

Illustration All the data in this catalog are chosen from the ″Preliminary Seismological Report of Chi-nese Seismic Stations″ (Its abbreviation is ″Monthly Report″). The catalog includes the events of M≥4.7 in and near China and M≥6 all over the world. The ″Monthly Report″ is monthly compiled by the Ninth Section of Institute of Geophysics, China Earthquake Administration. The origin times of earthquakes in the catalog adopt coordinated universal time (UTC) in accordance with…