• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>2014 31st URSI General Assembly and Scientific Symposium >Correlation between seismic events and anomalous VLF day-length for west-east and east-west propagation paths
【24h】

Correlation between seismic events and anomalous VLF day-length for west-east and east-west propagation paths

机译：东西向和东西向传播路径地震事件与超低频日长的相关性

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

We present results of year-long analysis of VLF signals, both for VTX-Malda (west-east propagation path) and VTX-Pune (east-west propagation path). We analyzed whole year data of 2008 and 2009 for VTX-Malda and VTX-Pune propagation path, respectively. In both the cases we found that VLF day-length (defined as time difference between sunset terminator time and sunrise terminator time) became anomalously high 1–2 days before an earthquake. Besides this year-long study we have also done some case by case analysis. On 9th January, 2009 an earthquake of magnitude 5.5 occurred at Carlsberg Ridge (latitude 10.3° N, longitude 57.1° E). In a separate incident, on 3rd November, 2009, another earthquake of magnitude 5.4 occurred at Andaman Islands (latitude 14.1° N, longitude 93.1° E). We analyze VLF signals for VTX-Pune (east-west propagation path) propagation path around these two earthquake days and found that for both of these cases, the VLF-day-length became anomalously high two days before the event. This agrees well with statistical analysis based on year-long data for VTX-Pune path. Furthermore, during time period of June, 2010, two major earthquakes of low-depth (10Km) and high magnitude (M > 5) occurred near NWC-Salt Lake (east-west propagation path) propagation paths. First one occurred on 13th June, 2010 at Nicobar Islands, India (latitude 7.8° N, longitude 92.0° E). Its magnitude was 5.1 (in Richter scale). The second one of magnitude 6.0 (in Richter Scale) occurred on 19th June, 2010 at Andaman Islands, India (latitude 13.4° N, longitude 93° E). For both of these two earthquakes, we found that VLF-day-length, became anomalously high one day before earthquakes. We claim that these were pre-cursors of the earthquakes which occurred in Andaman and Nicober Islands.
机译：我们介绍了为VTX-Malda（东西向传播路径）和VTX-Pune（东西向传播路径）对VLF信号进行的为期一年的分析结果。我们分别分析了2008年和2009年VTX-Malda和VTX-Pune传播路径的全年数据。在这两种情况下，我们都发现地震发生前1-2天，VLF的日长（定义为日落终止时间与日出终止时间之间的时间差）异常高。除了为期一年的研究，我们还进行了个案分析。 2009年1月9日，嘉士伯岭发生了5.5级地震（北纬10.3°，东经57.1°）。在2009年11月3日的另一起事件中，安达曼群岛又发生了5.4级地震（北纬14.1°，东经93.1°）。我们分析了这两天地震前后VTX-Pune（东西向传播路径）传播路径的VLF信号，发现对于这两种情况，事件发生前两天的VLF天长度异常高。这与基于VTX-Pune路径的全年数据的统计分析非常吻合。此外，2010年6月，在NWC-盐湖（东西向传播路径）传播路径附近发生了两次低深度（10Km）和高强度（M> 5）大地震。第一次发生在2010年6月13日，印度尼科巴群岛（北纬7.8°，东经92.0°）。其大小为5.1（以里氏标度计）。第二个6.0级（以里氏标度计）发生于2010年6月19日在印度安达曼群岛（北纬13.4°，东经93°）。对于这两次地震，我们发现在地震发生的前一天，VLF天的长度变得异常高。我们声称这些是安达曼和尼科伯群岛地震的前兆。

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