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1.
Ｓｔｕｄｙｏｎｔｈｅｆｅａｔｕｒｅｓｅｌｅｃｔｉｏｎａｎｄｃｌａｓｓｉｆｉｃａ┐ｔｉｏｎｅｆｅｃｔｏｆｐｒｅｃｕｒｓｏｒｙｄａｔａｏｆｇｒｏｕｎｄｔｉｌｔＺＨＥＮＧ－ＹＵＡＮＬＩ（李正媛），ＤＥ－ＦＵＣＨＥＮ（陈德福），ＹＩ－ＬＩＮＷＵ（吴奕麟）ａ... 相似文献
2.
Fractal and chaotic phenomena of seismic dissipated energy in an energy system of engineering struct
《地震学报(英文版)》1998,(4)
ＦｒａｃｔａｌａｎｄｃｈａｏｔｉｃｐｈｅｎｏｍｅｎａｏｆｓｅｉｓｍｉｃｄｉｓｓｉｐａｔｅｄｅｎｅｒｇｙｉｎａｎｅｎｅｒｇｙｓｙｓｔｅｍｏｆｅｎｇｉｎｅｅｒｉｎｇｓｔｒｕｃｔｕｒｅｓＹＵ－ＨＯＮＧＣＵＩ１）（崔玉红）ＹＯＮＧ－ＡＮＮＩＥ２）（聂永安）Ｚ... 相似文献
3.
ＡｒｅｓｅａｒｃｈｏｎｔｈｅｇｅｏｔｈｅｒｍａｌｓｔｒｕｃｔｕｒｅｉｎＹａｎｑｉｎｇ┐ＨｕａｉｌａｉＢａｓｉｎａｎｄｉｔｓｎｅｉｇｈｂｏｕｒｉｎｇｒｅｇｉｏｎＪＩＮ－ＨＵＡＺＵ（祖金华）ＱＩＡＮ－ＦＡＮＷＵ（吴乾蕃）ＹＵ－ＦＡＮＧＬＩＡＮ（廉雨方）... 相似文献
4.
Ｓｉｍｕｌｔａｎｅｏｕｓｉｎｖｅｒｓｉｏｎｏｆｖｅｌｏｃｉｔｙｄｉｓｔｒｉｂｕ┐ｔｉｏｎａｎｄｉｎｔｅｒｆａｃｅｐｏｓｉｔｉｏｎｓＳＯＮＧ－ＬＩＮＬＩ１）（李松林）ＮＩＮＧ－ＹＵＡＮＷＵ２）（吴宁远）ＺＨＡＮ－ＬＯＮＧＳＯＮＧ１）（宋占隆）ＪＩＮ－... 相似文献
5.
ＴｈｅＱｖａｌｕｅｖａｒｉａｔｉｏｎｓｉｎｔｈｅｐｒｅｐａｒｉｎｇｐｒｏ┐ｃｅｓｏｆｒｏｃｋｒｕｐｔｕｒｅＢＩＮＷＡＮＧ１）（王彬），ＺＨＡＯ－ＹＯＮＧＸＵ１）（许昭永），ＪＩＮ－ＭＩＮＧＺＨＡＯ１）（赵晋明）ＹＩ－ＬＩＨＵ２）（胡毅力）１）Ｓｅｉ... 相似文献
6.
The influencing factors and mechanisms of the electromagnetic radiation during rock fracture 总被引：4，自引：0，他引：4
ＴｈｅｉｎｆｌｕｅｎｃｉｎｇｆａｃｔｏｒｓａｎｄｍｅｃｈａｎｉｓｍｓｏｆｔｈｅｅｌｅｃｔｒｏｍａｇｎｅｔｉｃｒａｄｉａｔｉｏｎｄｕｒｉｎｇｒｏｃｋｆｒａｃｔｕｒｅＹＵ－ＺＨＯＮＬＩＵ１）（刘煜洲）ＹＩＮＬＩＵ１）（刘因）ＹＩＮ－ＳＨＥＮＧＷＡＮＧ２... 相似文献
7.
《地震学报(英文版)》1998,(4)
Ｒｅｓｅａｒｃｈｏｎｐｒｏｂａｂｉｌｉｔｙｏｆｓｅｉｓｍｉｃｃｒｉｔｉｃａｌｉｎｓｔａｂｉｌｉｔｙｏｎｂａｓｉｓｏｆ＇＇ｆｒａｃｔｕｒｅｃｏｌｌｕｓｉｏｎ＇＇ｍｏｄｅｌＳＨＩ－ＹＯＮＧＺＨＯＵ１）（周仕勇）,ＬＩＮＧ－ＲＥＮＺＨＵ１）（朱令人）,ＭＡ... 相似文献
8.
ＴｈｅａｐｐｌｉｃａｔｉｏｎｏｆｒｅｓｉｓｔｉｖｉｔｙｔｏｍｏｇｒａｐｈｙｔｏｈｙｄｒｏｇｅｏｌｏｇｉｃａｌｅｘｐｌｏｒａｔｉｏｎＲＵＩＦＥＮＧ１）（冯锐）ＸＩＡＯ－ＱＩＮＬＩ２）（李晓芹）ＹＵ－ＬＵＴＡＯ２）（陶裕录）ＣＩ－ＣＨＡＮＧＳＵＮ２）（... 相似文献
9.
ＳｔｕｄｙｏｆｔｈｅａｎｏｍａｌｙｏｆｓｅｉｓｍｉｃｆｒａｃｔａｌｓｐｅｃｔｒｕｍｂｅｆｏｒｅｓｔｒｏｎｇｅａｒｔｈｑｕａｋｅｓＬＩＮＧＲＥＮＺＨＵ１）（朱令人）ＳＨＩＹＯＮＧＺＨＯＵ１）（周仕勇）ＭＡＬＩＮＧＹＡＮＧ１）（杨马陵）ＨＡＩＴ... 相似文献
10.
ＡｕｎｉｆｏｒｍｃａｔａｌｏｇｏｆｅａｒｔｈｑｕａｋｅｓｆｏｒｓｅｉｓｍｉｃｈａｚａｒｄａｓｅｓｍｅｎｔｉｎＩｒａｎＮｏｏｒｂａｋｈｓｈＭｉｒｚａｅｉ１，２）ＭＥＮＧ－ＴＡＮＧＡＯ１）（高孟谭）ＹＵＮ－ＴＡＩＣＨＥＮ１）（陈运泰）ＪＩＡＮＷＡＮＧ１... 相似文献
11.
Ａｌｉｇｎｍｅｎｔｓｉｌｋｗｏｒｍｓａｓｓｅｉｓｍｉｃａｎｉｍａｌａｎｏｍａｌｏｕｓｂｅｈａｖｉｏｒ（ＳＡＡＢ）ａｎｄｅｌｅｃｔｒｏｍａｇｎｅｔｉｃｍｏｄｅｌｏｆａｆａｕｌｔ：ａｔｈｅｏｒｙａｎｄｌａｂｏｒａｔｏｒｙｅｘｐｅｒｉｍｅｎｔＭＯＴＯ... 相似文献
12.
Features and physical process of the dynamic evolution pattern of ground resistivity precursor front
ＩｎｔｒｏｄｕｃｔｉｏｎＳｉｎｃｅｔｈｅ１９６０′ｓ,ｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｍｏｄｅｒｎｓｃｉｅｎｃｅａｎｄｔｅｃｈｎｏｌｏｇｙｈａｓｇｒａｄｕａｌｙｍａｄｅｉｔｐｏｓｉｂｌｅｔｏｐｒｅｄｉｃｔｅａｒｔｈｑｕａｋｅｓａｎｄｈａｓｐｒｏｍｏｔ... 相似文献
13.
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 proves to be physically related to the earthquake
source stress field. Comparision of the sign distribution of coseismic resistivity changes with the solution of earthquake
source mechanism indicates that, the coseismic resistivity changes are of opposite sign but similar spatial distribution with
respect to the corresponding resistivity precursor changes. Therefore, from the resistivity observations we are of the opinion
that the Tangshan earthquake is an elastic rebound process. A virtual dislocation model of geoelectric precursor for the Tangshan
earthquake is proposed, in which the geoelectric precursors are supposed to be caused by the strain accumulation due to a
virtual dislocation, which is opposite in sign to the actual slip taking place at the earthquake occurrence. Taking into account
of the non-linear characteristics of the amplification factorK=(Δρ/ρ)/ɛ in a range of 10−7–10−5 strain changes, the theoretical distribution of geoelectric precursors for the Tangshan earthquake was calculated based on
the theory of fracture mechanics and reasonably selected dislocation parameters. The results show that the semi-quantitative
theoretical values are in good agreement with the observed, suggesting that the virtual dislocation model of the geoelectric
precursor is appropriate to the Tangshan earthquake.
Contribution No. 96A0023, Institute of Geophysics, SSB, China.
This work was supported by the National Natural Science Foundation of China and the Science and Technology Department of SSB. 相似文献
14.
Feng Chen Da-Yuan Chen Qi-Ping Cao Shu-Jun Yu Dong-Jun Xu Cong-Xin Chen Yu-Liang Yu Jian-Hao Sheng 《地震学报(英文版)》1993,6(3):721-729
In the strip limestone mine in Guiding county, Guizhou Province the shear and frictionin situ tests of rock body were made for the three typical inclined weak bands C
3
1
/C
3
1
, C
3
1
/C
2
2
and C
2
2
/C
2
1
. The tests were made according to the second scheme of cuneate sample of the standards on rock mechanics test of Water Conservancy
and Electricity Ministry. The changes of the resistivity in the weak band and the acoustic speed across the weak band were
measured in the same time. The apparent resistivity data, obtained for 8 samples on 27 measure lines in 38 cycle tests, show
that the apparent resistivity changes have rather obvious characters as follows: 1. At shear and friction stage, the change
of the apparent resistivity accelerates after the yield point, and reaches the maximum of change rate and change amplitude
near fracture point (except the lines with resistivity invariant); 2. On the same sample, the resistivity changes are different
on the various lines and related to the location settled the lines, there are some “sensitive” location; 3. At the stage of
preloading normal stress before shearing, the resistivity decreases on most lines, but on a few lines the resistivity does
not changes; 4. After unloading shear stress, the resistivity could not recover completely and the hysteresis of resistiviity
takes place on a few lines.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 217–223, 1993.
Support for this research was received from Guiding strip limestone mine, Guizhou Organic Chemistry Factory.
This research is supported by the Chinese Joint Seismological Science Foundation. 相似文献
15.
Following a new train of thinking, this paper has explored first the potential information in the ground resistivity data observed by the existing geoelectric observation system, investigated and proposed a new dimensionless geoelectric precursor factor, the degree of ground resistivity anisotropy, S, and studied the characteristics of dynamic evolution pattern of S during the seismogenic process. The results show that, during the seismogenic process, the degree of ground resistivity anisotropy (S) displays a process of 'normal' →'abnormal strengthening (amplitude, range)' →abnormal weakening' → 'earthquake occurrence'→ 'normal'. The earthquake would occur at the time when the S value has entered the late stage of strengthening and turns to weaken and in the gradient belt on the margin of S anomaly region. The dynamic evolution pattern of S reflects the changes of the tectonic stress field during the seismogenic process. Therefore, it would be possible to trace the process of earthquake generation and occurrence from the dynamic evolution pattern of S so as to service earthquake prediction. 相似文献
16.
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
17.
赵和云 《地震学报(英文版)》1994,7(3):465-474
ＴｈｅｐａｔｔｅｒｎｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｔｈｅｔｅｎｄｅｎｃｙｖａｒｉａｔｉｏｎｓｏｆｅａｒｔｈｒｅｓｉｓｔｉｖｉｔｙａｎｄｉｔｓｒｅｌａｔｉｏｎｔｏｅａｒｔｈｑｕａｋｅｓＨｅ－ＹｕｎＺＨＡＯ（赵和云）（ＥａｒｔｈｑｕａｋｅＲｅｓｅａｒ... 相似文献
18.
Starting with dislocation model, using the result of the fracture mechanics: the slip displacement at the crack tip is proportional
to the length of the crack and the applied ambient shear stressτ
0
2
, we consider the dislocation in the earthquake to be the slip displacement at the crack tip and have obtained the analysis
expresses of displacement and velocity pulse for the circular crack and have calculated the seismic wave energy radiated by
earthquake. The seismic wave energyE ∞M
0
τ
0
2
f(v)
r
, i. e.E is proportional to the seismic momentM
0 and the square of the ambient shear stressτ
0
2
and increases with the rupture velocityv
r
.
In frequency domain, integrating the square of source velocity spectrum derived from our the scaling law model, we have also
obtained the seismic wave energyE released by earthquake and earthquake radiated effficiencyη.E ∞M
0
τ
0
2
also. If takingτ
0 = 10.0 MPa, E=4.79M
0. This result is consistent with the estimate by Vassiliou and Kanamori (1982). Theη=5.26%. The distribution of the seismic wave energy is that most of the energy contains in the frequency range between the
first corner frequencyf
c1 and thirdf
c3, amount to 92.3% the energy in the rangef<f
c1 is about 3.85% and 3.85% whenf>f
c3. Thef
c3 is about 8Hz forM ⩾ 6, thus most of radiated energy is below 2Hz. This phenomenon had been verified by Vassiliou Kanamori.
Previous results show the energy radiated by earthquake to be strongly dependent on ambient shear stress.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 146–152, 1993.
This work was supported by the Deutsche Forschungsgemeinschaft, Bonn, F. R. Germany. The support is grateful acknowledged.
The authors are also grateful to Professor Klussmann and Mr. Hasthoff for their lots of help. 相似文献
19.
We present the geophysical evidences on the role of fluids for generation of the lower crustal Jabalpur earthquake (21 May 1997, mb 6.0, Mw 5.8), in the mid-continental fracture zone of the Indian Peninsular Shield. With a focal depth of 35 km, it indicates a high angled (< 62∘ enclosed with maximum principal stress direction) reverse fault with small component of left-lateral strike slip in the lower crust. The Son-Narmada-Tapti (SONATA) magalineament, during the past two centuries, has experienced about 25 moderate to strong earthquakes; two of which namely the Son Valley (1927, M 6.5) and Jabalpur (21 May 1997) were disastrous. Historical earthquakes and recent earthquake swarms indicate a moderate to high seismicity in SONATA belt that is due to high strain accumulation, flexuring of the crust and neotectonic movements of the faults in the rift zones. By analyzing geophysical parameters such as Zero-Free air-based (ZFb) gravity anomalies (∼ −10 to –30 mGals), heat flow values (45–47 mWm−2), magneto-telluric values (1- Ohm m), strain rate (1.5 × 10−8) and failure stress conditions, we identify plausible causative factors for the occurrence of lower crustal earthquake in this region Fluids, due to dehydration of serpentinite in the lower crust, are suggested to be present in the earthquake source zone. The estimated pore-fluid factor for the Jabalpur earthquake (λ
v
) is 0.95. The diffusion of pore-pressure relaxation, represented as pressure perturbation generated by coseismic stress change was seen in the form of swarm activity two years prior to the Jabalpur earthquake. We suggest the existence of a deep pre-fractured zone with low shear stress (τ = 15–18 MPa) that indicates the presence of fluid filled fractured mafic material in the felsic crust, in critical state of unstable failure condition, and also fluid driven migration of swarm activity before the Jabalpur earthquake. 相似文献
20.
The 26th April 1986 Dharamsala earthquake (mb 5.5) occurred in the Kangra region of Himachal Himalaya, which lies in the rupture zone of great Kangra earthquake of 1905.
This was the first moderate sized earthquake to be recorded at a few sites of the strong ground motion array in the NW Himalaya.
The accelerograms of this earthquake have been used to estimate its source parameters, site amplification functions and to
estimate the effective shear wave attenuation factor Qβ in the frontal region of Himachal Himalaya. A double couple fault plane solution for the earthquake has been obtained based
on the spectra of the transverse component of the accelerograms. The estimated values of the source parameters are seismic
moment: 2.1×1024 dyne-cm, static stress drop (Δσ): 36 bars, source radius (r): 2.8 km and moment magnitude (Mw): 5.4. The estimated average values of effective shear wave attenuation factor Qβ for various sites are in the range of 125 to 300 with an overall spatial average of 239. The influence of local site effects
on the observed PGA values have been examined on the basis of site amplification functions. 相似文献