A viscoelastic damage rheology and rate- and state-dependent friction   总被引：1，自引：0，他引：1  

Vladimir Lyakhovsky  Yehuda Ben-Zion  Amotz Agnon 《Geophysical Journal International》2005,161(1):179-190

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New constraints on subduction zone structure in northern Cascadia     

T. Nicholson  M. Bostock  J. F. Cassidy 《Geophysical Journal International》2005,161(3):849-859

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Three-dimensional V_P and V_S structural models associated with the active subduction and collision tectonics in the Taiwan region     

Kwang-Hee Kim  Jer-Ming Chiu  Jose Pujol  Kou-Cheng Chen  Bor-Shouh Huang  Yih-Hsiung Yeh  Peng Shen 《Geophysical Journal International》2005,162(1):204-220

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Active extension in Val d'Agri area, Southern Apennines, Italy: implications for the geometry of the seismogenic belt   总被引：1，自引：0，他引：1  

L. Maschio  L. Ferranti  P. Burrato 《Geophysical Journal International》2005,162(2):591-609

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Broadband seismic experiment at Merapi Volcano, Java, Indonesia: very-long-period pulses embedded in multiphase earthquakes     

D. Hidayat  B. Voight  C. Langston  A. Ratdomopurbo  C. Ebeling 《Journal of Volcanology and Geothermal Research》2000,100(1-4)

Multiphase (MP) and low frequency (LF) earthquakes with spectral peak amplitudes at 3–4 and 1 Hz, respectively, are two common types of shallow volcanic earthquakes previously recognized at Merapi Volcano. Their mechanisms are poorly understood but MPs have been temporally associated with lava dome growth. We conducted a seismic experiment in January–February 1998, using four broadband seismographs to investigate the nature of seismic activity associated with dome growth. During our experiment, Merapi experienced mild dome growth with low-level seismic activity. We compare our data to that recorded on a local short-period (SP) network, with the following preliminary results.MP and LF events as recorded and classified on the short-period network instruments were recognized on the broadband network. Frequency spectrograms revealed similar patterns in the near summit region at widely separated broadband stations. Higher frequency spectra than previously recognized were identified for both MP and LF events, and were strongly attenuated as a function of radial distance from the source. Thus the spectral characteristics of these events as recorded on far-field stations are not fully indicative of the source processes. In particular, many events classified as LF-type appear to have much high frequency energy near the source. This aspect of these so-called LF earthquakes, and their association with very-long-period (VLP) pulses, suggests that many events identified in the far-field as LF events are in actuality a variety of the MP event and involve similar source processes. Broadband records indicated that simple large-amplitude VLP pulses were embedded in MP and LF wavetrains. From event to event these pulses were similar in their waveforms and had periods of 4 s. VLP events embedded in LF and MP earthquakes were located using particle motions. The epicenters were clustered in a central region of the dome complex, and preliminary source depths were within about 100 m of the dome surface, suggesting a source region deep within the dome or the uppermost conduit. A similar source location was established by study of MP high-frequency onsets. Our broadband data suggests that we have recorded both elastic seismic waves and a simple embedded pulse that is interpreted to represent a surface tilt at the seismometer site. The inferred tilt indicates an inflation and subsequent deflation, possibly caused by a gas pressure pulse or episodic shallow magma transport with stick-slip movement of the conduit wall.  相似文献   

1969年渤海7.4级大震前后的区域地震活动图象   总被引：2，自引：0，他引：2  

杨港生  赵根模 《华北地震科学》2000,18(1):39-44

分析与总结了１９６９年渤海Ｍ７．４大震前后地震活动图象特征,包括大震序列的时空分布及前兆地震活动图象特征、大震等距迁移、主要间隔缩短、共轭断层蠕滑、小震成带、诱发前震现象,地震触发响应系数异常十分显著。指出地震相互作用和自组织性为中长期地震预报提供了可能。  相似文献   

东北深震与中国大陆主要构造带地震活动的相关性统计分析     

刘冬英  陈虹 《东北地震研究》2000,16(1):8-13

统计分析了中国大陆１９００年以来所有发生在东北的５级以上的学震及其与中国大陆２６个地震带６级以上（其中东部为５级以上）地震活动的相关性。结果表明７级以上深震有可能引发中国大陆地震活动进入应变能大释放阶段。其中与东北深震统计相关最高的地震带是：金沙江地震带、南天山地震带澜沧江－眉公河地震带以及巴颜喀拉山地震带;在中国东商地区相关性相对较高的地区是：郯城－营口地震带、长江下游－南黄海地震带以臁东南沿海  相似文献   

The use of varved clay chronology for dating paleoseismic events: the Erstavik record in the Stockholm area, south Sweden     

Per-Einar Trften 《Sedimentary Geology》2000,130(3-4):167-181

Geological structures suggest that the Fennoscandian Shield was subjected to a higher seismicity at the end of the last glaciation than today. This article demonstrates the use of varved clay chronology for dating paleoseismic events. It is argued that the deposited annually layered glacial varves were sensitive to past ground movements. In the Stockholm area, the Erstavik varved clay chronology suggests four paleoseismic events: a first (I) dating from varve year 10,473 to 10,468 BP; a second (II) 10,451 to 10,445 BP; a third (III) 10,429 to 10,425 BP; and a fourth (IV) 10,409 to 10,404 BP. In De Geer's ‘old' (1940) chronology the first (I) dating corresponds with −1117 to −1112, the second (II) with −1095 to −1089, the third (III) with −1073 to −1069, and the fourth (IV) with −1053 to −1048. The most pronounced event was the one at around varve year 10,429 BP (varve −1073 in De Geer's ‘old' chronology). The recurrence time of about 20 years suggests a totally different seismic regime at the time of deglaciation than what exists today. It coincided with the period of maximum isostatic uplift. The complexity of the varved clay response to seismic events is also discussed.  相似文献   

ACCRETION OF AN EARLY CRETACEOUS INTRA- OCEANIC ISLAND ARC TO INDIA: EVIDENCE FROM THE YARLUNG ZANGBO SUTURE ZONE     

J.C.Aitchison  Badengzhu  A.M.Davis  Liu J.  Luo  H.  J.Malpas  I.McDermid  Zhou M.F.  Wu H.  S.Zyabrev WT  ”BX 《地学前缘》2000,(Z1)

ACCRETION OF AN EARLY CRETACEOUS INTRA- OCEANIC ISLAND ARC TO INDIA: EVIDENCE FROM THE YARLUNG ZANGBO SUTURE ZONE  相似文献   

THE EARLY UPLIFT IN NORTHERN TIBETAN PLATEAU: EVIDENCE FROM THE STUDY ON CENOZOIC VOLCANIC ROCKS IN QIANGTANG REGION     

Li Guangming  Pan GuitangWT  ”BX 《地学前缘》2000,(Z1)

THE EARLY UPLIFT IN NORTHERN TIBETAN PLATEAU: EVIDENCE FROM THE STUDY ON CENOZOIC VOLCANIC ROCKS IN QIANGTANG REGION  相似文献