...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Planetary and space science >Curuga 1930: A probable mini-Tunguska?
【24h】

Curuga 1930: A probable mini-Tunguska?

机译：1930年代：可能是迷你通古斯卡吗？

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

Eyewitness accounts of fireballs and explosions in the Curuca area, Brazil, in August 1930, led to the suggestion that a large meteorite had fallen. It was later discovered that a seismic event had occurred on the same day and approximately the same hour as the Curuca event and in the same area. There is also a published description of a circular feature of about 1.2 km diameter in Landsat images of the River Curuca basin; it has been suggested that this feature could be the trace of an impact crater produced by the Curuc a event. In the present work, it was calculated that the creation of a 1.2 km impact crater would require energies able to generate an earthquake of a magnitude between 5.7 and 6, which is greater than the magnitude of the quake reported by Vega (1996). This, together with the fact that the seismic record shows clear evidence that it was a local seism, indicates that the circular feature is not an impact crater related to the Curuca event. A consideration of alternative possibilities suggests that the object involved in the Curuca event could have had a diameter less than 9 m and could have exploded with an energy < 9 kt without producing destruction in the forest or on the land.
机译：1930年8月在巴西库鲁卡地区发生的火球和爆炸的目击者证言表明，有一颗大型陨石坠落了。后来发现，地震事件与库鲁卡地震发生在同一天，大约同一小时，发生在同一地区。在库鲁卡河流域的Landsat影像中也有关于直径约1.2 km的圆形特征的公开描述；有人认为，此功能可能是Curuc事件产生的撞击坑的痕迹。在目前的工作中，据计算，建立一个1.2公里的撞击坑将需要能量来产生5.7至6级的地震，这比维加（1996）报道的地震的强度要大。这与地震记录显示清楚的证据表明它是局部地震这一事实一起，表明圆形特征不是与库鲁卡事件有关的撞击坑。考虑其他可能的可能性表明，与库鲁卡事件有关的物体直径可能小于9 m，能量小于9 kt爆炸，而不会在森林或陆地上造成破坏。

著录项

  • 来源
    《Planetary and space science》 |2011年第1期|p.10-16|共7页
  • 作者

    Guadalupe Cordero; Arcadio Poveda;

  • 作者单位

    Depto. Ciencias Espaciales, Institute de Ceofisica, Universidad National Autdnoma de Mexico, Ciudad Universitaria, Delegation Coyoacan, 04510 Mexico, D.F., Mexico;

    Institute de Astronomia, Universidad National Autonoma de Mexico, Ciudad Universitaria, Delegation Coyoacan, 04510 Mexico, D.F., Mexico;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    meteoroids; cratering; tunguska; curuca;

    机译：流星体;陨石坑;通古斯卡;库鲁卡;

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