The Gornozavodsk earthquake of August 17(18), 2006, in the south of Sakhalin Island     

B. V. Levin  Kim Choon Oon  I. N. Tikhonov 《Russian Journal of Pacific Geology》2007,1(2):194-199

The August 17 (18), 2006, Gornozavodsk earthquake (M_w = 5.6) in the southwestern part of Sakhalin was preceded by a number of anomalous seismological and geophysical phenomena. The extensive data recorded by a network of digital seismic stations make it possible to track the aftershock dynamics of the process within 24 hours after the main event. The paper describes various manifestations of the earthquake.  相似文献   

地块活动与成组地震关系的初步探讨   总被引：11，自引：1，他引：10       下载免费PDF全文

范俊喜  马瑾  刁桂苓  单新建 《地震学报》2001,23(5):514-522

中国大陆构造的成块性与中国地震活动的成组性构成中国地震构造和地震活动的一个突出现象．本文在前人对中国大陆地震成组划分的结果和地块划分方案的基础上,研究了中国大陆地块与成组地震活动之间的关系,发现大部分强震分布于地块边界断层上,成组地震的孕育和发生与块体活动有关．由成组地震震中分布图表现出来的地块活动方式主要有４种:单缝式活动型、单地块活动型、多地块活动型和地块内部活动型．地块活动频度以单缝式活动型为最高,在成组地震中则以单地块活动型为多．大陆内部各地块的活动性有差别,东部比较活跃的地块有太行山和华北平原地块,西部比较活跃的地块有川滇和昆仑-松潘地块．   相似文献   

The influence of earthquakes on the Chandler wobble during 1977–1983     

Richard S. Gross 《Geophysical Journal International》1986,85(1):161-177

Summary. A direct calculation is made of the effect on the Chandler wobble of 1287 earthquakes that occurred during 1977–1983. The hypocentral parameters (location and origin time) and the moment tensor representation of the best point source for each earthquake as determined by the 'centroidmoment tensor' technique were used to calculate the change in the Chandler wobble's excitation function by assuming this change is due solely to the static deformation field generated by that earthquake. The resulting theoretical earthquake excitation function is compared with the 'observed' excitation function that is obtained by deconvolving a Chandler wobble time series derived from LAGEOS polar motion data. Since only 7 years of data are available for analysis it is not possible to resolve the Chandler band and determine whether or not the theoretical earthquake excitation function derived here is coherent and in phase with the 'observed' excitation function in that band. However, since the power spectrum of the earthquake excitation function is about 56 dB less than that of the 'observed' excitation function at frequencies near the Chandler frequency, it is concluded that earthquakes, via their static deformation field, have had a negligible influence on the Chandler wobble during 1977–1983. However, fault creep or any type of aseismic slip that occurs on a time-scale much less than the period of the Chandler wobble could have an important (and still unmodelled) effect on the Chandler wobble.  相似文献   

Seismicity and present-day tectonics of the Svalbard region     

B. J. Mitchell  H. Bungum  W. W. Chan  P. B. Mitchell 《Geophysical Journal International》1990,102(1):139-149

  相似文献   

On the linear relation between m_b and M_s for discrimination between explosions and earthquakes     

All A. Nowroozi 《Geophysical Journal International》1986,86(2):687-699

Summary. The statistical capability of the m _b: M _s discriminant for the discrimination of earthquake and explosion populations is examined by application of discriminant functions to a group of 83 explosions and 72 earthquakes in Eurasia. Equations are derived for the probability that an event is an earthquake or an explosion. The positive sign of DIS in the decision index equation, DIS _i = 34.3383 – 11.9569 mb _t + 7.1161 M _si , indicates that the event i is an earthquake. Its negative sign indicates that event i is an explosion. The probability of correct classification for an event, P _i , is related to its DIS _i value, by P _i = [1-exp (DIS _i )]⁻¹, where a large, positive DIS indicates a high probability that an event is an earthquake and a large, negative DIS indicates a high probability that an event is an explosion. The discrimination line M _s = 1.680 m _b– 4.825, or m _b= 0.595 M _s+ 2.872 very successfully separates the explosion population from the earthquake population. The points on this line have an equal chance of being an earthquake or an explosion; moreover, for any event, the distance parallel to the M _s-axis from the point representing that event in the m _b: M _s plane to this line is a measure of the probability for the correct classification of that event.  相似文献   

Coda Q In the Eastern Caribbean, West Indies   总被引：1，自引：0，他引：1  

W. B. Ambeh  L. L. Lynch 《Geophysical Journal International》1993,112(3):507-516

  相似文献   

Likelihood analysis of earthquake catalogues   总被引：5，自引：0，他引：5  

Y. Y. Kagan 《Geophysical Journal International》1991,106(1):135-148

We apply several classes of stochastic multidimensional models to statistical analysis of earthquake catalogues using likelihood methods. We investigate the importance of including different earthquake parameters in the model: epicentral coordinates, hypocentral depth, time limits for interearthquake interaction, and especially spatial distribution of earthquakes as well as spatial aftershock patterns. Results of this study combined with other investigations, suggest that most distributions controlling earthquake interaction have a fractal or scale-invariant form. Developed models are used for statistical analysis of several earthquake catalogues to evaluate parameters of earthquake occurrence. These parameters are shown to be similar for shallow earthquakes of different magnitude ranges and seismogenic regions, confirming self-similarity of the earthquake process. Whereas intermediate earthquakes seem to emulate the pattern of shallow earthquake occurrence, albeit at a much smaller aftershock rate, deep earthquakes differ significantly in their properties. Predictability of standard shallow earthquake catalogues has been analysed; we present evidence that for the best available catalogues the predictability is close to 10 bits per earthquake. Several synthetic earthquake catalogues have been created and processed through the likelihood inversion scheme. The results from likelihood analysis of these catalogues confirm our approach.  相似文献   

Earthquake hazard in the Kenya Rift: the Subukia earthquake 1928     

N. N. Ambraseys 《Geophysical Journal International》1991,105(1):253-269

  相似文献   

Undead earthquakes   总被引：1，自引：0，他引：1  

R.?M.?W.?MussonEmail author 《Journal of Seismology》2005,9(1):111-114

This short communication deals with the problem of fake earthquakes that keep returning into circulation. The particular events discussed are some very early earthquakes supposed to have occurred in the U.K., which all originate from a single enigmatic 18th century source.  相似文献   

Geothermal Structure in a Seismoactive Region of Central India     

S.R.?Sharmasrsharma@Yahoo.com" title="srs@ngri.res.in  srsharma@Yahoo.com" itemprop="email" data-track="click" data-track-action="Email author" data-track-label="">Email author  V.K.?Rao  D.M.?Mall  T.N.?Gowd 《Pure and Applied Geophysics》2005,162(1):129-144

  相似文献