...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Geophysical Research Letters >Observation of a Core‐Diffracted P‐Wave From a Farside Impact With Implications for the Lower‐Mantle Structure of Mars
【24h】

Observation of a Core‐Diffracted P‐Wave From a Farside Impact With Implications for the Lower‐Mantle Structure of Mars

机译：Observation of a Core‐Diffracted P‐Wave From a Farside Impact With Implications for the Lower‐Mantle Structure of Mars

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

摘要

Abstract We report on the observation of a diffracted P‐wave (Pdiff) along the core of Mars from a distant impact that has been recorded by the Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) mission. The identification of Pdiff allows us to sample the P‐wave velocity structure of the lower mantle that hitherto could not be constrained because of lack of lower‐mantle‐traversing P‐waves. In addition to Pdiff, we are able to pick PP‐, PPP‐, and SS‐wave arrivals and locate the event to the farside of Mars in the vicinity of Tharsis, in agreement with the imaged location of the impact. This indicates that our joint single‐station seismic event‐location and structure‐inversion scheme is both robust and accurate. Based on inversion of the body‐wave arrival time picks made here, we find lower P‐wave velocities in the deep mantle relative to predictions based on thermochemically homogeneous models.

著录项

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