共查询到20条相似文献，搜索用时 93 毫秒
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１９９７年２月２８日伊朗西北部的阿尔达比勒省发生了破坏性地震，造成了重大伤亡和广泛的破坏，该震共破坏了１１０个村庄，使９６５人丧生，２６００人受伤，约４万人无家可归，文章综合介绍了这次地震的震源参数，破坏，伤亡和救灾情况等。 相似文献
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１９９７年９月２６日￣１０月１６日在意大利中部地区连续发生６次中强地震，共１２人死亡，１００多人受伤，文章介绍了这一地震序列和破坏情况，同时简要介绍了意大利的地震管理机构，地震监测和研究工作。 相似文献
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国际大陆碰撞带地震和减轻地震灾害大会于１９９３年１０月在亚美尼亚埃里温－塞凡举行博尔特１９８８年１２月７日，本世纪最大的地震灾害之一袭击了亚美尼亚北部。据政府部门估计，这次地震造成２．５万人死亡，至少５１．４万人无家可归，３万人受伤。亚美尼亚西北部的... 相似文献
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2001年1月26日，印度西北部古吉拉特邦发生7．9级强烈地震，造成重大的人员伤亡和财产损失。古吉拉特邦政府地震救灾委员会2月3日公布，已有16000多人死亡，5万多人受伤，数十万人无家可归，震区大量房屋遭受不同程度的破坏，公路、铁路、通讯、供水、电力中断，有8个主要城镇和1016个村庄受灾。，直接经济损失达45亿美元。本文给出了“1．26”大地震的震源参数，印度地震构造和历史地震记录资料，初步总结了这次地震的教训与启示，概述了地震破坏及其对国内经济的重大影响以及国内救灾和国际大援助情况，并简述了印度的地震研究工作。 相似文献
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A.Ayadi S.Maouche A.Harbi M.Meghraoui H.Beldjoudi F.Oussadou A.Mahsas D.Benouar A.Heddar Y.Rouchiche A.Kherroubi M.Frogneux K.Lammali F.Benhamouda A.Sebai S.Bourouis P.J.Alasset A.Aoudia Z.Cakir M.Merahi O.Nouar A.Yelles A.Bellik P.Briole O.Charade F.Thouvenot F.Semane A.Ferkoul A.Deramchi S.A.Haned黄静 吕春来 《世界地震译丛》2004,(4):18-21
2003年5月21日，一次震级为Mw6．8的破坏性地震袭击了阿尔及利亚北部城市阿尔及尔以东40km的布迈德斯地区(图1)。主震持续了约36～40S，造成灾难性的后果，据称有2300人死亡，超过11450人受伤，约200000人无家可归。这次地震推毁及严重破坏约180000幢住宅和6000座公共建筑，评估损失达50亿美元。在阿尔及利亚，震中半径400km范围内主震时有感。北边直到西班牙东南部(包括巴利阿里群岛)、撒丁岛和法国南部地震时也有感。 相似文献
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１９９７年５月１０日伊朗东北部地区再次发生破坏性地震。造成重大的人员伤亡和财产损失，几十个村庄被毁，４０００余人互亡。６０００我人受伤，数万人无家可归，直接经济损失约１．５亿美元。文章综合介绍了这次地震的震源参数，发震背景，破坏，伤亡和抗震求灾情况等。 相似文献
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从１９９６年３月１９日－１９９７年４月１６日，新疆南部阿图什，伽师地区连续发生６级以上强烈地震８次，造成了生命和财产的损失，共有４６人死亡，３２３人受伤，约２．７万间房屋倒塌。文章综合介绍了新疆伽师地震序列，发震背景，震源参数及抗震求灾情况等。 相似文献
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1997年伽师地震震害与损失评估 总被引：4，自引：1，他引：4
１９９７年１～４月在新疆伽师连续发生了７次６级强烈，给伽师县，岳普湖到，阿图什市及兵团农三师等地造成了严重的经济损失与人员伤亡，地震造成２１人死亡，１１２人受伤，数万间房屋遭到不同程度的破坏。地震造成的直接经济损失达９３６５７．５６万元。 相似文献
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The determination of the coefficient of viscosity of eruptive products gives useful elements to the knowledge of possible variations of composition and physical conditions of the magmas. 相似文献
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As is known, the secular deceleration of the Earth's diurnal rotation is explained mainly by the tidal friction in the ocean. Below we consider this mechanism in some detail, taking into account also elastic deformations of the mantle under the action of ocean loading and the interaction between the tide-generating body, ocean tidal wave, liquid outer core, and solid inner core. It is shown that elastic displacements of the core-mantle boundary under the action of ocean loading are of about the same amplitude and phase as the elastic loading displacements of the Earth's outer surface. As a result, side by side with the mechanism of secular deceleration of diurnal rotation of the mantle, there are also (1) the opposite mechanism of secular acceleration of diurnal rotation of the outer liquid core and of the solid inner core and (2) the mechanism of excitation of differential rotation in the liquid core. Taking these effects into account, we compare theoretical and modern observed data on the eastward drift of the solid inner core. It is shown that the best agreement may be obtained if the turbulent viscosity of the liquid core is about 2 × 10
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Poise 相似文献
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The nutations of the planets Mars andEarth are investigated and compared. Alarge number of interior structureparameters are involved in the nutationcomputations. The comparison between the observations and the computationsprovides several constraints on these parmeters andtherefore allows a better understanding of the physics of the interior of theplanet. For the Earth, the high precision of the observations of the nutationshas led to a very good determination of interior properties of the planet. ForMars, observations of nutations are not yet available, and we review how theamplitude of the Martian nutations depends on the hypotheses consideredfor its interior. Although Mars is very similar to the Earth, its interior is not well known;for example, we don't knowif its core is liquid or solid. Only if the core is liquid,the Free Core Nutation (FCN) normal mode exists and can alter the nutationswhich are close to the resonance. From the observed geoids, it is known thatboth planets are not in hydrostatic equilibrium. The departure is larger forMars than for the Earth, and consequently, the implication of considering a convective mantle instead of a mantle in hydrostatic equilibrium described byClairaut's equation for the initial equilibrium state of the planet is largeron the Martian nutations than on the Earth nutations. The consequences of theuncertainty in the core dimensions are also examined and shown to be of a veryhigh influence for Mars if the core is liquid, due to the potential changes inthe FCN resonance. The influence of the presence of an inner core, which isknown to exist for the Earth, could be more important for Mars than for theEarth if the inner core is large. Due to the presence of Tharsis on Mars, thetriaxiality of this planet has, additionally, larger effects than on Earth. 相似文献
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Studia Geophysica et Geodaetica - 相似文献
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地震激励下处于深水中的桥墩和周围水体的相互作用将对桥梁结构的动力响应产生较大影响。首先对地震作用下水-桥墩的相互作用理论做了概括,给出了动水压力对桥墩的作用效应及各自的适用范围;对主要的三种考虑流固耦合效应的分析方法做了对比,探讨了地震作用下影响水-结构相互作用的主要因素,并对今后的研究提出了建议。 相似文献
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Geomagnetism and Aeronomy - The magnetic evolution of the active region of the Sun at the level of the photosphere has been studied. Magnetic synoptic maps of the 2007 Kitt Peak Observatory were... 相似文献
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V. E. Pavlov T. Yu. Tolmacheva R. V. Veselovskiy A. V. Latyshev A. M. Fetisova I. V. Bigun 《Izvestiya Physics of the Solid Earth》2017,53(5):702-713
Until recently, the existing data prevented the geophysicists from accurately dating the Bysy-Yuryakh stratum, which outcrops in the middle reach of the Kotuy River, constraining the time of its formation to a wide interval from the end of the Late Cambrian to the beginning of the Silurian. The obtained paleomagnetic data unambiguously correlate the Bysy-Yuryakh stratum to the Nyaian regional stage and constrain its formation, at least a considerable part of it, by the Tremadocian. This result perfectly agrees with the data on the Bysy-Yuryakh conodonts studied in this work and yields a spectacular example of the successful application of paleomagnetic studies in solving important tasks of stratigraphy and, correspondingly, petroleum geology. Within the Bysy-Yuryakh stratum, we revealed a large normal-polarity interval corresponding to the long (>1 Ma) period when the geomagnetic reversals were absent. This result, in combination with the data for the Tremadocian and Middle–Upper Cambrian sequences of the other regions, indicates that (1) the rate of occurrence of the geomagnetic reversals on the eve of the Ordovician Moyero superchron of reversed polarity was at most one reversal per Ma; (2) the superchron does not switch on instantaneously but is preceded by a certain gradual change in the operation conditions of the dynamo mechanism which, inter alia, manifests itself by the reduction of the frequency of geomagnetic reversals with the approach of the superchron. This finding supports the views according to which a process preparing the establishment of the superchrons takes place at the core–mantle boundary. 相似文献
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Summary A simple model is proposed suitable for studying the effect of the ground layer of the atmosphere, polluted by aerosol, on the albedo. This model is founded on solving the equation of transfer of radiative energy. The numerical results are discussed, particular attention being paid to the analysis of errors due to neglecting the multiple reflection of solar radiation on the aerosol particles. A method which would also include the multiple reflection is proposed, and the conditions under which the presence of the aerosol is responsible for an increase or decrease of the solar radiation balance on the Earth's surface, are analysed. 相似文献