A Review of Catalogues of Chinese Earthquakes

In the past decade, the most authoritative catalogues of Chinese earthquakes and the most popular with seismologists in China are the following:(1) Gu Gongxu, 1983, Catalogue of Chinese Earthquakes;(2) Min Ziqun, 1988, Concise Catalogue of Chinese Earthquakes;(3) Xie Yusuou, 1989, Catalogue of Chinese Earthquakes (M≥ 4.7) from 1900-1980 with Uniform Magnitudes; and(4) Min Ziqun, 1995, Catalogue of Chinese Historical Strong Earthquakes. Earthquakes that occurred before 1900 are mainly documented in historical records.Since 1950s, more recent earthquakes were documented in two major compilations of historical records finished in 1956 and 1983-1987. Separately this effort resulted in two chronicles: two volumes for the first one and five volumes for the second one. The magnitudes are converted from the maximum intensity. These magnitudes, by convention, are connected with surface wave magnitudes. However, it is clear that they do not have any strict seismological definition.The period of 1900-1962 documen     

A Brief Account of Professor

LiDaoyong,graduatedinforeignladingesandliteratureatWuhanUniversityin1948,isaretiredprofessoratEncyclopediaofChinaPublishingHouse,amemberoftheChineseTranslators'andInterpreters'Association.HismainsparetimepublicationsrelevanttoEnglishasfollows:Chiefed...     

A Review of the Status of Seismicity in 1994

A total of 48 earthquakes with M_s ≥5.0 occurred in China in 1994 (29 on the Chinese mainland and offshore, 19 in Taiwan). Among them 9 earthquakes were of M_s ≥6.0 (4 on the mainland and offshore, 5 in Taiwan). The M_s 7.3 earthquake that occurred in Taiwan Straits on September 16 was the greatest one offshore, which was generally included in the mainland area according to the previous statistics. The most powerful earthquakes in Taiwan were the 2 with M_s =7.0 that occurred on May     

A Review of Seismicity in 1998

I. SURVEY OF GLOBAL SEISMICITY IN 1998 A total of 17 earthquakes with M_s≥7.0 occurred in the world in 1998 according to the determination by the Chinese Seismic Station Network. The strongest earthquake occurred in Sulawesi, Indonesia (M_s7.8, November 5, 1998). The next strongest earthquake was the South Pacific Ocean earthquake (M_s7.7, March 25, 1998) and the Ryukyu earthquake (M_s7.7, May 4) (Fig. 1).     

A Review of Seismicity in 2004

1 SURVEYOFGLOBESEISMICITYIN 2 0 0 4Atotalof 1 9strongearthquakeswithMS≥ 7 0occurredintheworldaccordingtotheChineseSeismicStationNetworkin 2 0 0 4 (Table 1 ) .ThestrongestearthquakewastheSumatraearthquakewithMS8 7nearthenorthwestcoastofSumatraonDecember 2…     

A Review of Seismicity in 1995

1. SURVEY OF SEISMICITY IN CHINA IN 1995 A total of 48 earthquakes with M_s≥5.0 occurred in China in 1995 (30 on the Chinese mainland and offshore, 1 in the South China Sea, and 17 in Taiwan) (Fig. 1). Among these, 8 earthquakes were     

A Review of Seismicity in 1996

Ⅰ. SURVEY OF THE GLOBAL SEISMICITY A total of 28 earthquakes of M_s ≥7.0 occurred over the entire world in 1996 according to the determination by the Chinese Seismic Station Network. The strongest one is the Irian earthquake (M_s 7.9, February 17, 1996, Indonesia) (Fig. 1). It is considered that the global seismicity in 1996 is still situated in the active period based on the comprehensive analysis of its frequency, magnitude, and range.     

A Review of Seismicity in 2005

1SURVEY OF GLOBAL SEISMICITYIN2005In2005,atotal of16strongearthquakes recordingMS≥7.0occurredinthe world,accordingtothe Chinese Seismic Station Network(Table1).The strongest earthquake registeringMS8.5strucknear the northwest coast of Sumatra on March29,2005(Fig.1).In2005,the frequency and energyrelease of earthquakes were reduced compared to a year earlier.The characteristics of the seismicityare as follows:Fig.1The distribution of global earthquakes registeringMS≥7.0during…     

A Review of Seismicity in 1997

Ⅰ. SURVEY OF GLOBAL SEISMICITY A total of 23 earthquakes with M_s ≥ 7.0 occurred over the world in 1997 according to the determination of the Chinese Seismic Station Network. The strongest one was the Kamchatka peninsula earthquake (M_s 7.9, December 5, 1997) (Fig. 1). Although the frequency and strength of global seismicity was lower compared with the higher activity state in 1995 and 1996, the frequency of seismicity was still obviously higher than the average level during this century.     

A Review of Seismicity in 2003

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.     

A Review of Seismicity in 2006

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).     

A Review of the Seismicity in 2000

1. A SURVEY OF THE GLOBAL SEISMICITYAccording to the rec()rding of the seismic fletwork o[ China, 20 large earthquakes with M,     

A Review of the Seismicity in 2002

A total of 16 strong earthquakes with Ms≥7.0 occurred in the world in 2002 according to the determination of the Chinese Seismic Station Network (Table 1 ). The two strongest earthquakes were Sumatra earthquake (Ms7.8, November 2) and Alaska earthquake ( Ms 7.8 November 4) . Fig. 1 is the distribution of strong earthquakes that occurred in 2002. The global seismicity pattern in 2002 was similar to the ones since 1999. The frequency and strength apparently decreased in 2002 compared with the seismicity in 2001.     

A stochastic model of the Fourier phase of strong ground motion

ＡｓｔｏｃｈａｓｔｉｃｍｏｄｅｌｏｆｔｈｅＦｏｕｒｉｅｒｐｈａｓｅｏｆｓｔｒｏｎ　ｇｒｏｕｎｄｍｏｔｉｏｎＺｈｅｎ－ＰｅｎｇＬＩＡＯ；（廖振鹏）ａｎｄＸｉｎｇＪＩＮ（金星）（ＩｎｓｔｉｔｕｔｅｏｆＥｎｇｉｎｅｅｒｉｎｇＭｅｃｈａｎｉｃｓ，ＳｔａｔｅＳ...     

A new approach to numerical simulation of source development of earthquake

ＡｎｅｗａｐｐｒｏａｃｈｔｏｎｕｍｅｒｉｃａｌｓｉｍｕｌａｔｉｏｎｏｆｓｏｕｒｃｅｄｅｖｅｌｏｐｍｅｎｔｏｆｅａｒｔｈｑｕａｋｅＣＨＵＮ－ＡＮＴＡＮＧ（唐春安）ＹＵ－ＦＡＮＧＦＵ（傅宇方）ＷＥＮＺＨＡＯ（赵文）ＣｅｎｔｅｒｆｏｒＲｏｃｋｂｕｒｓｔｓ...     

A review of: “Dynamics of the upper atmosphere”

Abstract

By Susumu Kato. Center for Academic Publications Japan/D. Reidel Publishing Company, 1980. xiii+233pp. (£15.95) (ISBN 90277 1132 1).     

A Physical Method of Analyzing theMechanism of Continental StrongShocks from Crustal Movement

In order to analyze the mechanism of continental strong shocks from the angle of crustal movement using the data of repeated geodetic survey, this paper has proposed a physical method; it analyzes the mechanism of density change due to the occurrence of strong shocks by use of the physical quantity that reflects the time change of crustal density. ( 1 ) The general theory of the time change of density in the earth‘ s interior and the theory of the time change of single layer density have been introduced, and an algorithm of stepwise iteration has been proposed; (2) The effect of the change of single layer density caused by fault dislocation has been analyzed in brief; (3) The characteristics of the time change of crustal density in the south of the seismogenic region before the 1996 Lijiang earthquake with ML = 7.0 have been studied; (4) The precursor model or causal mechanism of strong shocks possibly existing in the time change of crustal density has been investigated preliminarily.     

A Local Least-Squares Modification of Stokes’ Formula

The combination of Stokes formula and an Earth Gravity Model (EGM) for geoid determination has become a standard procedure. However, the way of modifying Stokes formula vary from author to author, and numerous methods of modification exist. Most methods are deterministic, with the primary goal of reducing the truncation bias committed by limiting the area of Stokes integration around the computation point, but there are also some stochastic methods with the explicit goal to reduce the global mean square error of the geoid height estimator stemming from the truncation bias as well as the random errors of the EGM and the gravity data. The latter estimators are thus, at least from a theoretical point of view, optimal in a global mean sense, but in a local sense they may be far from optimality.Here we take advantage of the error variance-covariance matrices of the EGM and the terrestrial gravity data to derive the modification parameters of Stokes kernel in a local least-squares sense. The solution is given for the unbiased type of modification of Stokes formula of Sjöberg (1991).     

A study of design spectra based on attenuation relationship of ground motion

In recent years, more and more studies are focused on the performance in seismic design instead of the strength of structures. People have realized that the structure deformation (displacement) can describe the damage more properly and directly than the strength (force). The displacement design spectra need to be constructed within more wide range of the period and the damping for the displacement-based seismic design. 1 Acceleration design spectra The influence factors for the typical design …