在冰岛使用光纤地质测试的频繁入的分钟级动态
Jiaxuan Li1,2, Ettore Biondi1, Elías Rafn Heimisson3
1Seismological Laboratory, California Institute of Technology, Pasadena, CA, USA.
概括
使用低频分布式声学传感 (LFDAS) 的光纤地球测量跟踪了冰岛格林达维克附近的火山堤入侵. 这种方法提供了高分辨率的近实时数据,用于喷发预测和危险评估.
科学领域:
- 地质学
- 火山学
- 地震学
背景情况:
- 持续地质测量对于了解火山附近的岩动态至关重要.
- 堤入侵的高时空分辨率仍然是火山监测的一个重大挑战.
研究的目的:
- 引入和验证使用LFDAS的光纤地质测量来追踪堤入侵.
- 为了实现火山变形事件的分钟级分辨率.
主要方法:
- 在电信光纤电缆上使用低频分布式声学传感 (LFDAS).
- 应用于LFDAS应变数据的地质颠倒技术.
- 监测冰岛格林达维克附近的堤入侵.
主要成果:
- 已经成功追踪了九起入侵事件, 其中六起导致裂爆发.
- 在火山爆发前15到22分钟,
- 证明了 LFDAS 作为高分辨率变形成像密度计阵列的能力.
结论:
- 纤维光学测量为近乎实时地表变形的成像提供了强大的工具.
- LFDAS为改善喷发预测和危险评估提供了关于岩演变的关键见解.
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