共查询到20条相似文献，搜索用时 69 毫秒
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１９９５年７月１２日中缅边境７．３级地震预报成功１９９５年７月１２日０５时４６分在云南省孟连县中缅边境发生７．３级地震，震中（北纬２２．０度，东经９９．３度）距中国边界１０公里。这次地震受灾地区达５个县（孟连、勤海、西盟、澜沧、沧源）３３个乡，２００... 相似文献
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云南孟连西中缅交界发生７．３级地震据我国地震台网测定，１９９５年７月１２日０５时４６分３７．１秒，在北纬２２．０°、东经９９．３°的云南省孟连县西中缅交界缅方一侧发生一次Ｍｓ７．３级地震，震源深度为９公里，微观震中距边界约１０公里。这次地震前，该区１... 相似文献
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云南是中国地震活动最为频繁的省份之一。在１９９５年７月于１９９６年２月的７个月期间,接连发生了３次大地震,它们是,１９９５年７月１２日孟连地震（Ｍ＝７．３）;１９９５年１０月２４日武定地震（Ｍ≡６．５）,和１９９６年２月３日丽江地震（Ｍ≡７．０）。本在对上述３次地震作简单介绍的同时,将重点强调孟连地震的短临预报及社会响应能力。孟连地震是一次前震－主震－余震型地震,发震时刻为１９９５年７月１２日０ 相似文献
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１９９５年７月１２日中缅边境７．３级地震概况１９９５年７月１２日在云南省孟连县中缅边境发生强烈地震，造成生命财产重大损失。１．震源参数（１）发震时间１９９５年７月１１日格林尼治时间２１时４６分；北京时间７月１２日０５时４６分。（２）震级我国地震台网测... 相似文献
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虎皮鹦鹉(Melopsittacus undulafus)的声行为与地震关系的观测 总被引：1，自引：0，他引：1
观测期内,云南相继发生了１９９５年７月１２日孟连西７．３级、１９９５年１０月２４日武定６．５级和１９９６年２月３日丽江７．０级地震。结果表明,虎皮鹦鹉在地震发生前,声行为和活动节律出现一些不同程度的异常变化。开展虎皮鹦鹉声行为习性的定量预测,可为地震短期预报提供给一定的前兆信息。 相似文献
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北部湾６级双震的烈度分布魏柏林（广东省地震局，广州５１００７０）１９９４年１２月３１日在北部湾东南（２０°２６′Ｎ，１０９°２８′Ｅ）发生一次Ｍｓ＝６．１级地震。１９９５年１月１０日在原震中附近（２０°３０′Ｎ，１０９°２４′Ｅ）又发生一次６．２级地 相似文献
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１９９５年９月１４日墨西哥发生７．３级强烈地震１９９５年９月１４日墨西哥中部的格雷罗州发生强烈地震，地震波及首都墨西哥城、维拉克鲁斯、普埃布拉、米却肯和瓦哈卡州等地区，并造成轻度伤亡和破坏。１．震源参数（１）发震时间１９９５年９月１４日当地时间上午０... 相似文献
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《中国科学:地球科学(英文版)》2014,(12)
正SCIENCE CHINA Earth Sciences,an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China,and published by Science China Press and Springer,is committed to publishing high-quality,original results in both basic and applied research. 相似文献
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《中国科学:地球科学(英文版)》2014,(9)
正SCIENCE CHINA Earth Sciences,an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China,and published by Science China Press and Springer,is committed to publishing high-quality,original results in 相似文献
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In natural waters arsenic concentrations up to a few milligrams per litre were measured. The natural content of arsenic found in soils varies between 0.01 mg/kg and a few hundred milligrams per kilogram. Anthropogenic sources of arsenic in the environment are the smelting of ores, the burning of coal, and the use of arsenic compounds in many products and production processes in the past. A lot of arsenic compounds are toxic and cause acute and chronic poisoning. In aqueous environment the inorganic arsenic species arsenite (As(III)) and arsenate (As(V)) are the most abundant species. The mobility of these species is influenced by the pH value, the redox potential, and the presence of adsorbents such as oxides and hydroxides of Fe(III), Al(III), Mn(III/IV), humic substances, and clay minerals. 相似文献
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《中国科学:地球科学(英文版)》2014,(3)
正SCIENCE CHINA Earth Sciences,an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China,and published by Science China Press and Springer,is committed to publishing high-quality,original results in both basic and applied research. 相似文献
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《国际泥沙研究》2014,(4)
正Director:Shangfu Kuang,China Vice-directors:Chunhong Hu,China Duihu Ning,China Guangquan Liu,China The International Research and Training Center on Erosion and Sedimentation(IRTCES)was jointly set up by the Government of China and UNESCO on July 21,1984.It aims at the promotion of international exchange of knowledge and cooperation in the studies of erosion and 相似文献
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Richard D. Hey 《地球表面变化过程与地形》1979,4(1):59-72
Feedback mechanisms, which operate upstream through drawdown and backwater effects and downstream through sediment discharge are responsible for channel evolution. By combining these mechanisms with channel processes it euables a dynamic process-response model to be developed to simulate the initial evolution of straight gravel-bed channels. When erosion commences on a land surface, sediment entrained in the headwater reach by hydraulic action is selectively transported, deposited and reworked. This produces a damped oscillation between degradation and aggradation as the channel and valley respond to spatial and temporal variations in sediment calibre and hydraulic conditions. The initial cut and fill phases are responsible for valley incision and floodplain development while secondary and subsequent activity can produce river terraces. Eventually sediment entrainment in the headwaters declines as slopes are reduced. Subsequent channel evolution is relatively insignificant because it is dependent on local weathering activity producing material that can be transported on declining slopes. Therefore landforms produced during the initial phase of development, when local weathering was non-limiting, dominate the landscape. 相似文献