...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Seismological research letters >Aftershock investigation in the Andaman-Nicobar Islands: An antidote to public panic?
【24h】

Aftershock investigation in the Andaman-Nicobar Islands: An antidote to public panic?

机译：安达曼尼科巴群岛的余震调查：消除公众恐慌的对策？

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Public panic prevailed in every part of the Andaman and Nicobar Iislands of India following the megathrust Sumatra earthquake (M-w 9.3) on 26 December 2004. In this article, we present a very brief analysis of our continuous three-month (January-March 2005) monitoring and recording of aftershock data following the main earthquake to show how this endeavor reduced public panic and constituted an important ingredient to a disaster management program for the Andaman-Nicobar region. Monitoring was conducted using six short-period three-component temporary digital seismograph stations set up in different parts of the Andaman and Nicobar islands. Our findings demonstrate that 1) there was no aftershock gap zone as recorded by the far-distant seismographic network, hence negating the possibility of immediate strong quakes in the Andaman and Nicobar islands; 2) there was no strong shaking at full moon (26 January 2005) due to tidal stresses, although the rate of aftershock activity increased by about 31% from the events of the preceding day; 3) there is a north-south trending 850 x 350-km(2) rupture area beneath the Andaman and Nicobar islands; and 4) eruptions of mud at the Baratang volcanic zone and lavas at the Barren volcanic zone occurred because of strong shaking due to the mainshock and a series of afiershock clusters within 100 km of the individual volcanic zones. These eruptions may continue for a couple of years, until the aftershock sequence ceases. We show that this new dataset from the local seismographic network constituted an important factor in reassuring the coastal people and islanders about imminent dangers from future earthquakes and tsunamis, and we propose geochemical tests of the erupted mud samples from the Baratang volcanic zone, with geophysical exploration followed by drilling, to ascertain the presence of oil and gas reserves and the phenomenon of gas seepage under the land and sea in the Middle Andaman region of India.
机译：在2004年12月26日发生的特大苏门答腊地震（Mw 9.3）之后，印度的安达曼和尼科巴岛群岛的每个地方都普遍出现了恐慌情绪。在本文中，我们对连续三个月（2005年1月至3月）进行了非常简要的分析。监视和记录大地震后的余震数据，以显示此项工作如何减少公众恐慌，并成为安达曼-尼科巴地区灾难管理计划的重要组成部分。使用在安达曼和尼科巴群岛不同地区建立的六个短期三分量临时数字地震台站进行了监测。我们的发现表明：1）遥远的地震台网没有记录到余震带区域，从而消除了安达曼和尼科巴群岛立即发生强烈地震的可能性; 2）尽管由于前一天的余震活动率比前一天增加了约31％，但由于潮汐应力，在满月（2005年1月26日）没有发生强烈的晃动; 3）在安达曼群岛和尼科巴群岛下方有一个南北向的850 x 350 km（2）破裂区; 4）由于主震和单个火山区100 km以内的一系列非震群引起的强烈震动，导致Baratang火山区的泥浆喷发和Barren火山区的熔岩喷发。这些爆发可能会持续数年，直到余震序列停止。我们表明，来自本地地震台网的新数据集是使沿海人民和岛民放心未来地震和海啸的迫在眉睫的重要因素，并且我们建议对Baratang火山区喷出的泥浆样品进行地球化学测试，并进行地球物理探测。然后进行钻探，以确定印度中部安达曼地区陆地和海洋下是否存在油气储量和天然气渗漏现象。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号