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1.
Effect of earth tide on deep well water level 总被引：2，自引：0，他引：2
On the basis of the partial differential equations of the water level in a deep well that is affected by the bulk strain tide,
the boundary conditions of permeating each other between aquifer and well are considered. The solutions of the equations have
been obtained by the superposition principle, inpulse theorem and separation of the variations. Some suitable values are given
to the parameters of well aquifer in the solutions. By means of the numerical calculation the relations among the well tide
coefficients and phase lag phenomenon of response of the well level to earth tides is well interpreted. The parametric studies
and the obtained graphs show that the more the radius of casing in a well, the porosity of an aquifer and the bulk compressibility
for solid matrix of an aquifer, the less the transmissibility of an aquifer, then the less the tidal coefficient of well level,
while the more the phase lag for well level to respond to the tide is. The response of the well level to the tide of longer
period is better than the shorter period events.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 66–75, 1991. 相似文献
2.
In the light of the rheological properties of crustal rocks and some features of earthquakes, a rheological model for fault
rocks is suggested in the paper and the possibility of applying the suggested model to the study of earthquake mechanism is
discussed. The results show that it is reasonable to take the suggested model as a physical simplification of fault rocks
and to apply it to the numerical calculation and simulation of 2-D problems.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 129–136, 1992. 相似文献
3.
Preliminary study on late Quaternary activities of buried faults in Beijing plain area 总被引：1，自引：0，他引：1
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 385–388, 1993. 相似文献
4.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 248–253, 1991. 相似文献
5.
Bo-Chong Zhang Rui Chen Hong Li Ying-Nan Qi Ji-Zhen Mao Peng Liu Fang-Quan Li 《地震学报(英文版)》1993,6(3):769-774
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 253–256, 1993. 相似文献
6.
Zhi-Rong Yang 《地震学报(英文版)》1993,6(3):781-787
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 123–127, 1993. 相似文献
7.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 395–398, 1991. 相似文献
8.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 243–247, 1991. 相似文献
9.
Shu-Jun Yu 《地震学报(英文版)》1993,6(2):541-548
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 109–114, 1993. 相似文献
10.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 124–127, 1992. 相似文献
11.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 243–246, 1992. 相似文献
12.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 257–260, 1993. 相似文献
13.
This paper aims to analyse the geoelectrical resistivityρ
s
data on the dipole electrode sounding, which were firstly accumulated from the earthquake prone region in China. The analyses
on the one order difference value of the geoelectrical resistivity indicated that, firstly, more than 4 percent of theρ
s
data reveals the precursors by 3 to 76 days ahead the earthquakes occurring, with the magnitude range of 4 ≤M ≤ 6. 4, in a region of 100 km around the station, and secondly, the results revealed that the seasonal variation ofρ
s
data were slight.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 211–219, 1992. 相似文献
14.
Vertical differential movement rates of the fault on north margin of the Weihe downfaulted basin in recent 2000 years are
analyzed by using the data of shifts of the head of Zhengguo canal, dug in Qin dynasty and the data of burial depths of historical
relics and the data of levelling. The results show that in Ming dynasty this fault experienced the highest differential up-and-down
movement, about 6.6 mm/a, while the rate became lower since Qing dynasty, about 2.6 mm/a. The high rate activity coincided
with the period of high seismic activity in the Weihe downfaulted basin in the 15 – 16th centuries.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 195–200, 1992.
This project is sponsored by the Chinese Joint Seismological Science Foundation. 相似文献
15.
Xiwen Wang 《地震学报(英文版)》1992,5(1):133-143
In this paper, the application of Backus—Gilbert’s inversion method to the potential field anomalies for evaluating gravity
and magnetic inversion solutions is discussed. Errors in data and singularity of kernels in the equations result in difficulties
in solving equations. The application of regularization method similar to spectral expansion method makes calculation fast
and easily. To make solution stable, constraints are used, which make the spread of solutions become narrow, standard deviation
become small and iterative computations of inversion become fast. Finally, the author analyses specifically two profiles of
Yunchen basin and calculated the Moho interface and the Curie isotherm of these two profiles.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 212–221, 1991. 相似文献
16.
Using observational data of geomagnetic total intensity from 13 stations in the Beijing-Tianjin region, 3 stations in the
western Yunnan region of China, and 6 stations in California of U. S. A., the daily variations and their spectra of geomagnetic
total intensity were analyzed and compared. The results show that the morphology, the range and spectrum of daily variations
in geomagnetic total intensity are basically the same within the local extent of 100–200 km and are different in the large
extent of 500 km. The latitude factor of the daily variation range of geomagnetic total intensity is about 1–2 nT/degree within
the latitude extent of 25°–40°.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 83–89, 1992.
This work is supported by the State Seismological Bureau and the Chinese Joint Seismological Science Foundation, and U.S.
Geological Survey. 相似文献
17.
Some geophysical surveying works in the northeast part of Dandong, such as shallow shock refracted wave, electrical prospecting,
electrical sounding and wave velocity measuring, are introduced in this paper, and the dynamic parameters are calculated.
The results show that the basement structure in surveying region is very complex, the overburden thickness of the quaternary
period, velocity distribution and dynamic parameters are of regional characteristics. The depth of basement is deep in the
north and shallow in the west, the difference between north and west region is about 5–10 m. The south part of Yalu river
fault belt is composed of F1, F2, F3, F4, F5 fault, their strike direction is NE, we can determine that the F2 fault is the main one in Yalu river fault belt, and the south part of Yalu river fault belt has no activity since Holocene
Epoch.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 282–288, 1993. 相似文献
18.
The method of reconstructing a phase space with higher dimensions can be applied to analysing the observaiton data for studying
the dynamic behavior of seismic processes and earthquake prediction. It is found that seismic processes are chaotic. So earthquakes
could be determinately predicted only within the predictable period. Here, some related problems (e.g. several primary parameters
and the relations among them, the relation between the quality of used data and analytical results, the relation between a
reductive process of the fractal dimensions and earthquake prediction and so on) are discussed.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 470–476, 1993.
This study was sponsored by the Chinese Joint Seismological Science Foundation under Contract NO. 9000007. 相似文献
19.
Based on Generalized Seismic Ray Theory (Helmberger, 1968), a new quickly linear inversion method from the data of seismic
waveform to seismic moment tensor and source mechanism for domestic earthquake is studied in this paper. Six moderately strong
earthquakes which occurred in Chinese mainland in the past few years are studied. The seismic source parameters of these earthquakes,
seismic moment tensors, scalar seismic moments, fault plane solutions and source time functionsetc, are obtained.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 261–268, 1993. 相似文献
20.
Conclusion Based on the analysis about the law of deformation rate, the concepts of the deformation rate of precursor, and its stress
drop, and the stress drop of instability are discussed. According to the obtained deformationu
0 corresponding to the maximum stress, the unstable pointu
1 and the stable pointu
2 of equilibrium, the complete process of rock failure can be divided into four stages quantitatively, corresponding to “the
steady stage I”, “the precursor stage II”, “the unstable stage III” and “the later stage IV” of rock failure respectively,
which can be used to simulate the complete course of earthquake. This kind of similarity between the complete process of rock
failure and the complete course of earthquake suggests clearly the direction to reveal the law being of universal significance
for the simulation of the earthquake in the laboratory experiments.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 517–521, 1991. 相似文献