Acta Seismologica Sinica
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Maximum entropy spectral characteristics of seismic activity for great earthquakes in China
Acta Seismologica Sinica - Tập 10 - Trang 7-14 - 1997
The maximum entropy spectral characteristics of seismicity in the seismic enhanced region of 11 great earthquakes is analysed in this paper to seek the difference of seismic period spectral structure between the normal and the abnormal stage of seismic activity in this paper. The results show that, during decades or even one hundred years before great earthquakes, only short periods with 6.5–24.3 ......
Strain-geoelectric resistivity precursor and the virtual dislocation model to the Tangshan earthquake
Acta Seismologica Sinica - Tập 9 - Trang 103-108 - 1996
The complete records of geoelectric resistivity before two earthquakes were analyzed, including 16 stations within 240 km around the Tangshan earthquake and 2 stations within 50–60 km from theM6.1 Datong earthquake. By eliminating various disturbances in the records and realizing the precursory anomalies to be reliable, the authors studied the distribution of the geoelectric precursor field, which......
Characteristics of foreshock and its identification
Acta Seismologica Sinica - Tập 18 Số 2 - Trang 180-188 - 2005
Numerical simulation of the influence of lower-crustal flow on the deformation of the Sichuan-Yunnan Region
Acta Seismologica Sinica - - 2007
Quadrant characteristics of earthquake precursors and its theoretical analysis
Acta Seismologica Sinica - Tập 14 Số 1 - Trang 58-65 - 2001
Site amplification in the Lijiang Valley, Yunnan Province
Acta Seismologica Sinica - Tập 12 - Trang 193-198 - 1999
The site amplifications for three stations, Libin (LIBI), Baisha (BASH) and Yulong (YULG) situated respectively in the southern, middle and northern parts of Lijiang Valley, are obtained by analyzing the S-wave soil/bedrock and microtremor horizontal/vertical spectral ratios. The data are digital recordings for the aftershocks of the Lijiang M
s=7.0 earthquake on February 3, 1996. ......
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
Synthesis of accelerations of the 1976 Tangshan earthquake (M S 7.8) in near- and far-field by using semi-empirical method
Acta Seismologica Sinica - Tập 10 - Trang 347-354 - 1997
In this paper a heterogeneous fault model of the Tangshan earthquake is suggested, which consists of two southern sub-faults striking N30°E and two northern sub-faults striking N50°E. Total length of the main shock fault is 114 km and seismic moment is about 1.4 × 1020 N·m. The epicentre of the main shock is located at the southern part, near the intersection of the two bands. Accelerations of two......
Arrival time measurements of first arrival phases P and PKIKP using the method of fixed scale wavelet transformation ratio
Acta Seismologica Sinica - Tập 18 - Trang 410-418 - 2005
The arrival times of first teleseismic phases are difficult to be measured precisely because of slowly and gradually changed onsets and weak amplitudes. The arrival times measured manually are usually behind the real ones. In this paper, using the ratio method of fixed scale wavelet transformations improved by us, the arrival times for the first arrival phases (such as P and PKIKP) at the teleseis......
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......
Tổng số: 990
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