Acta Seismologica Sinica
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Features of fractal dimension anomaly of radon content in underground water in North China before and after the 1976 Tangshan earthquake
Acta Seismologica Sinica - - 1995
On correlation between seismic activities and focal mechanisms of subsequent strong earthquakes
Acta Seismologica Sinica - Tập 19 - Trang 406-416 - 2006
On the basis of the results from spatial-temporal scanning of moderate seismic activities prior to 63 strong earthquakes occurred since 1966, we investigate in this paper the characteristics of anomalous evolution of moderate seismic activities prior to strong earthquakes with different focal mechanisms in different tectonic blocks, as well as the correlation between principal seismic activities a......
A comparison of tectonic ambient shear stress value in China with that in western USA
Acta Seismologica Sinica - - 2002
The physical implication of coda amplitude ratio and its possible application
Acta Seismologica Sinica - Tập 11 - Trang 441-448 - 1998
The physical implication of coda amplitude ratio is discussed in term of energy ratio. The digitized data recorded at the station of Beijing Telemetered Seismograph Network between 1989 and 1990 are used to calculate amplitude ratios of coda to direct S wave, and energy ratios. The spectral energy ratios are used to estimate the coda Q and mean free path l in the Beijing area, as well as the two q......
Study on in-situ stress measurement around coastal marginal land in Fujian
Acta Seismologica Sinica - Tập 18 Số 5 - Trang 544-551 - 2005
Large, moderate, small earthquakes and seismic fortification criterion
Acta Seismologica Sinica - Tập 17 - Trang 589-595 - 2004
This paper discusses the relation between two-step seismic design and the standard of probability of exceedance, and the relation of three-levels seismic ground motion parameters given by probability method and comprehensive probability method. The relative size relations of the ground motions with 2%, 10%, 63% probability of exceedance in 50 years, namely “large earthquake”, “moderate earthquake”......
A staggered-grid high-order finite-difference modeling for elastic wave field in arbitrary tilt anisotropic media
Acta Seismologica Sinica - Tập 18 - Trang 471-482 - 2005
The paper presents a staggered-grid any even-order accurate finite-difference scheme for two-dimensional (2D), three-component (3C), first-order stress-velocity elastic wave equation and its stability condition in the arbitrary tilt anisotropic media; and derives a perfectly matched absorbing layer (PML) boundary condition and its staggered-grid any even-order accurate difference scheme in the 2D ......
The focal mechanism solution of the M s 6.5 Wuding earthquake in Yunnan Province of October 24, 1995
Acta Seismologica Sinica - Tập 10 - Trang 307-312 - 1997
The focal mechanism of Wuding earthquake with magnitude M=6.5 on October 24, 1995 is estimated by the method of inversion of seismic tensor in this paper. The two principal axes are nearly horizontal, the principal compressive axis is about N30°E, the nodal plane which strikes about N105°E (N75°W) is probably consistent with the actual rupture plane.
Inversion of 3-D crustal P-wave velocity structure in Ningxia and its neighborhood by using direct, reflected and refracted waves
Acta Seismologica Sinica - Tập 12 - Trang 436-446 - 1999
In this paper, simultaneous inversions for hypocentres and three-dimensional (3-D) crustral P-wave velocity structure of Ningxia and its neighborhood are performed, by using the data of direct P wave, reflected Pm and refracted Pn phases from the Moho discontinuity. The number of arrival-time applied to the inversion is 11 816 total, which are recorded by the Seismic Station Network of Ningxia fro......
Seismic anisotropy of the crust in Yunnan, China: Polarizations of fast shear-waves
Acta Seismologica Sinica - Tập 19 - Trang 620-632 - 2006
Using seismic data recorded by Yunnan Telemetry Seismic Network from January 1, 2000 to December 31, 2003, the dominant polarization directions of fast shear-waves are obtained at 10 digital seismic stations by SAM technique, a systematic analysis method on shear-wave splitting, in this study. The results show that dominant directions of polarizations of fast shear-waves at most stations are mainl......
Tổng số: 990
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