搜索结果: 1-15 共查到“知识库 地球物理学 1999”相关记录17条 . 查询时间(0.464 秒)
The Global Seismic Hazard Assessment Program (GSHAP) - 1992/1999
Earthquake seismic hazard assessment UN/IDNDR seismic risk mitigation
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2015/9/30
The United Nations, recognizing natural disasters as a major threat to human life and development, designed the
1990-1999 period as the International Decade for Natural Disaster Reduction (UN/IDNDR; ...
Evaluation of electric and magnetic field monitoring of Miyake-jima volcano monitoring of Miyake-jima volcanomonitoring of Miyake-jima volcano (Central Japan):1995-1999
Miyake-jima volcano lectromagnetic monitorin of volcano volcanomagnetic effect resistivity self potential thermal magnetic effect
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2015/9/28
Evaluation of electric and magnetic field monitoring of Miyake-jima volcano monitoring of Miyake-jima volcanomonitoring of Miyake-jima volcano (Central Japan):1995-1999.
Source parameters of the Izmit-Bolu 1999 (Turkey) earthquake sequences from teleseismic data
source inversion complex earthquake North Anatolian Fault
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2015/9/28
Body waveform modelling and far-field displacement spectral analyses were used to study the source parameters of five of the largest earthquakes of the (Izmit-Bolu) Turkey 1999 sequence. The derived s...
The 1998-1999 Pollino (Southern Apennines, Italy) seismic crisis: tomography of a sequence
seismic sequences stress field evolution Southern Apennines Calabrian Arc Pollino Chain
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2015/9/10
In 1998-1999 a seismic sequence occurred in the Southern Apennines, after the moderate size (mb=5.0) 9th September
1998 Pollino earthquake. It lasted about 14 months and was clearly localized to the ...
Geodetic deformation Across the Central Apennines from GPS Data in the time span 1999-2003
Geodetic Deformation Gps Apennines
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2015/9/10
Abstract During the time span 1999-2003 was set up and repeatedly surveyed a not permanent GPS network located across one of the highest seismic areas of the central Apennines (Italy). The Central Ape...
A teleseismic finite-fault rupture model for the August 17,1999,304;zmit earthquake (Mw = 7.6): implications for the seismic nucleation phase
North Anatolian Fault 1999 İ zmit earthquake Rupture process Slip distribution Rupture nucleation
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2015/8/24
A linear finite-fault inversion procedure is applied to teleseismically recorded broadband P and SH velocity waveforms of the August 17, 1999, İzmit earthquake, to derive spatial and temporal dis...
1999年台湾集集地震震后450天的GPS观测资料显示了几十到几百毫米的地表位移.下地壳的震后黏性松弛和断层无震蠕变产生的震后滑动是用来解释地表震后变形的两个主要机制.本文利用接触问题的黏弹性有限元(LDDA)方法,以GPS观测数据作为约束,分别考察了黏性松弛和震后滑动机制对地表震后变形的影响.计算结果表明,黏性松弛机制产生的地表位移与观测数据吻合较好,通过试错法由震后GPS观测约束得到的下地壳黏...
强震后地表变形的动力学机制研究 —以1999年台湾集集地震为例
震后变形机制 黏弹性有限元 GPS时间序 集集地震
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2009/10/10
强震后地表变形的动力学机制是地球动力学研究的重要方面, 现在普遍认为震后变形主要由断层的震后余滑或由介质的黏弹性松弛所至. 1999年台湾集集地震GPS观测系统记录到了空前的资料, 为研究震后变形的动力学机制提供了难得的机会. 本研究认为集集地震后地表变形由震后断层余滑、下地壳/上地幔的黏弹性松弛、震源区介质的破裂、孔隙弹性回跳、地下流体的运移、介质孔隙度及孔隙压的变化等多种因素共同影响决定. 为...
Kinematics of the November 12, 1999 (Mw=7.2) Düzce Earthquake Deduced from SAR Interferometry
Düzce earthquake SAR Interferometry GPS elastic modelling source parameters
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2009/7/8
On November 12 1999, a destructive earthquake struck the Düzce area, following the 17 August 1999 İzmit earthquake that had occurred to the west about 3 months earlier. The Mw=7.2 Düzce earthqua...
Coulomb Stress Interactions and the 1999 Marmara Earthquakes
1999 Marmara earthquakes Coulomb stress earthquake hazard
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2009/7/8
The effects of previous earthquakes on the 1999 İzmit and Düzce earthquakes, the influence of the İzmit earthquake on the Düzce earthquake, and the seismic hazard in the Marmara region are ...
Water-Level Changes in Shallow Wells Before and After the 1999 İzmit and Düzce Earthquakes and Comparison with Long-Term Water-Level Observations (1999–2004), NW Turkey
ground-water well-level changes earthquake forecast continental deformation North Anatolian Fault Zone Thrace-Eskiş ehir Fault Zone 1999 İ zmit-Düzce earthquakes
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2009/7/7
It is well known that earthquakes cause hydrological changes, such as drying or flooding of water wells, fluctuations in ground-water levels in wells, changes in water quality, and formation of new sp...
Temporal Variations in Bio-Optical Properties of Four North Estonian Lakes in 1999-2000
limnology lake optics optically active substances underwater light field attenuation coefficient spectra phytoplankton
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2009/6/9
To investigate the seasonal variation of bio-optical parameters in lakes of different type regular measurement campaigns were carried out in four North Estonian lakes in 1999–2000. Some parameters (re...
1999年台湾集集地震余震区——嘉义地区地震的剪切波分裂参数随时间变化的研究
台湾集集地震 余震区 嘉义地震 地震各向异性 剪切波分裂 应力预测前兆 快剪切波偏振方向 慢剪切波时间延迟
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2008/5/21
本文利用台湾中央气象局布设的嘉义台CHY、民雄台CHN2和义竹台CHN8记录的地震波形资料，使用波形互相关的SAM分析方法(剪切波分裂系统分析方法)，对发生在1999年9月20日台湾集集大地震（MW7.6）余震区的嘉义ML6.4和ML60级地震的震前序列，开展了长达22个月的大震前近场源剪切波分裂参数随时间变化的应力预测研究.研究结果表明，在正常情况下，快剪切波的偏振方向大致近东西向，与嘉义地区...
1999年台湾集集地震震源破裂过程
集集地震 同震位移 破裂过程
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2010/12/24
使用GPS同震位移资料和远场P波记录，研究了1999年台湾集集地震震源破裂过程．根据地质构造和余震分布引入了一个由弯曲断层面构造的三段“铲状”断层模型．在使用静态GPS位移资料反演集集地震的断层破裂滑动分布时，由于集集地震断层北部近地表破裂的复杂性，在位错模型中考虑拉张分量对地表同震位移的贡献，可更好地同时拟合GPS观测资料的水平和垂向分量．而纯剪切位错弹性半空间模型和分层地壳模型都无法同时拟合水...
Horizontal coseismic deformation of the 1999 Chi-Chi earthquake measured from SPOT satellite images: Implications for the seismic cycle along the western foothills of central Taiwan
earthquake Chi-Chi Taiwan coseismic imagery Okada
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2014/4/15
The 1999 Chi-Chi earthquake,Mw= 7.6, broke a major thrust fault along the western foothills of the Central Range of Taiwan. We have measured the horizontal coseismic displacement field by correlating ...