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 Posted: Sat 21:05, 19 Feb 2011 Post subject: moncler jackets outlet Earthquake in Hangzhou Bay |
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Earthquake in Hangzhou Bay and its adjacent areas Geological Research Progress
, Visible at low tide, the local tidal difference of 2 m length of beach rock outcrop about 300 meters, we can see the width of 60 - 70 )]~::, exposed tens of centimeters thick, water still covered the lower dichotoma. Beach rock formed by the sand and shell debris,[link widoczny dla zalogowanych], containing a small amount of gravel. It cemented a solid, hard as rock, bedding clarity, and a micro-bedding. _ Outcrop as a whole pizza butterfly superimposed on top layer can break apart by hand, to the sea ground tilt angle of 4. - 10. . Jazz Rock River Beach 3486 C age of 99 years ago,[link widoczny dla zalogowanych], the beach rock is tropical, subtropical climate chamber under the conditions of rapid formation of bio-carbonate end, compared with that meaning. Beach rock from the Grand River in Taiwan, a large number of shell fragments and powder we know that the beach rock formed in the strong hydrodynamic environment, the larger storm surges caused by high energy wave action results. Rock intertidal beach book for a 9 to indicate a sea of ancient tidal line to line position. Grand River beach rock samples in the tide line pitch is the vertical height of 12.5 meters, that 3400 years, the region is slowly sinking more stable state, the average settlement rate of 0.51 mm / year. Grand River beach rock may be found in the distribution of the current location of the northernmost barrier beach Pliocene rocks, beach rocks in China, and topography, climate,[link widoczny dla zalogowanych], coastline, a new study tectonic movement is of great significance. 5.1505 on Oct. 9 Yangtze Estuary 6 /. Earthquake epicenter of the new research 1D AD 9 May 1505, in the Yangtze River Estuary there was a land of basket. Jiangsu,[link widoczny dla zalogowanych], Zhejiang and Shanghai and so strongly felt, particularly around Shanghai and Hangzhou Bay area most affected. The earthquake is of Jiangsu, Zhejiang coastal region of a historical earthquake felt in most of Shanghai and Hangzhou Bay Week imprison thirty ��seismic risk areas have a crucial impact assessment. The historical records of earthquakes is far more abundant, but the epicenter is determined by divergence. It was set in the South Yellow Sea, was set at Hangzhou Bay, north-south difference of about 2. , Nearly 200 km. Lee Ki-Tong et al (1990) mainly based on seismic historical data, but also give full consideration to the other intensity line of the long axis of the same period, the historical earthquakes in the modern small earthquake strip, tectonic geomorphology, active tectonics and deep structure in six areas, a comprehensive analysis . In their view, 9 January 1505 1D 6. Earthquake epicenter to be in the mouth of Hangzhou Bay, the northern end of the Zhoushan Islands, the waters near Shengsi Islands, its geographical coordinates of latitude 30.9 north, longitude 122.7. And that the 1505 earthquake for the elderly Eguchi 6 '/ earthquake. All in all, in recent years, Hangzhou Bay and its adjacent areas in the earthquake geological studies despite some important progress, but there are still many issues need further study. For example, the Hangzhou Bay area of modern tectonic stress field in question, although water from the focal mechanism analysis and research to get some understanding of the Hangzhou Bay area has confirmed the country is north, south zone P-axis turning, but the less the area of modern earthquakes, but the lack of stress measurement data, so praise be to strengthen the area after the tectonic stress fields. Waters of Hangzhou Bay area, around the Quaternary cover was again large, natural outcrop less, to a field survey to increase the difficulties. To more precisely understand the subsurface structure of Hangzhou Bay area, boasts a bath after the Ministry should be strengthened in the area of geological structures. Such as oil and gas exploration needs of Hangzhou Bay, they can conduct offshore seismic exploration and precise gravity and magnetic measurements. Thus, as the country can be a fault zone in Hangzhou Bay, Shaoxing, an extension of the exact location, and a ball Xiaoshan Hangzhou Jia Xiang River fault zone in the distribution of the plain section of the situation and to provide more convincing evidence. In addition, the assessment of fault activity necessary for the new age of strata or gouge test data is also too little. Boast, it should work with the needs of earthquake engineering, to further strengthen the construction of Hangzhou Bay area activities. NEWPROGRESSINRESEARCHoNSEIoGEoLoGYoFHANGZHoUGULFANDITSNEIGHBoRINGREGIoNLiQitong (SeismologicalBureauofJiangsuProvince) AbstractThispaperdescribesuewprogressmadeintheresearchonseismogeologyalongtheHangzhougulfanditsneighboringregioninrecentyears, andatthesi ~ ra ~ time,[link widoczny dla zalogowanych], raisessOmeproblemswhichneedtobefurtherst �� diedinthefuture.
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