Time–Frequency Characteristics of Tsunami Magnetic Signals from Four Pacific Ocean Events

DOI DOI PDF Web Site Web Site 被引用文献5件 参考文献43件 オープンアクセス

書誌事項

公開日
2016-07-15
資源種別
journal article
権利情報
  • http://www.springer.com/tdm
  • http://www.springer.com/tdm
DOI
  • 10.1007/s00024-016-1345-5
  • 10.1007/978-3-319-55480-8_14
公開者
Springer Science and Business Media LLC

この論文をさがす

説明

The recent deployment of highly sensitive seafloor magnetometers coinciding with the deep solar minimum has provided excellent opportunities for observing tsunami electromagnetic signals. These fluctuating signals (periods ranging from 10–20 min) are generally found to be within \(\pm\) \(\sim\)1 nT and coincide with the arrival of the tsunami waves. Previous studies focused on tsunami electromagnetic characteristics, as well as modeling the signal for individual events. This study instead aims to provide the time–frequency characteristics for a range of tsunami signals and a method to separate the data’s noise using additional data from a remote observatory. We focus on four Pacific Ocean events of varying tsunami signal amplitude: (1) the 2011 Tohoku, Japan event (M9.0), (2) the 2010 Chile event (M8.8), (3) the 2009 Samoa event (M8.0) and, (4) the 2007 Kuril Islands event (M8.1). We find possible tsunami signals in high-pass filtered data and successfully isolate the signals from noise using a cross-wavelet analysis. The cross-wavelet analysis reveals that the longer period signals precede the stronger, shorter period signals. Our results are very encouraging for using tsunami magnetic signals in warning systems.

収録刊行物

被引用文献 (5)*注記

もっと見る

参考文献 (43)*注記

もっと見る

関連プロジェクト

もっと見る

問題の指摘

ページトップへ