キラウエア火山でのストレスメーターとして地震速度の変化の使用は,キラウエア火山でのストレスメーターとして使用されています
J Dieterich1, V Cayol, P Okubo
1US Geological Survey, Menlo Park, California 94025, USA. jdieterich@usgs.gov
Nature
|December 2, 2000
まとめ
現在,地震発生率は,地殻のストレス変化を推論することができます. キラウエア火山で成功裏に適用された新しい方法は,実際の遠隔感知ストレスメーターとして地震発生率を示しています.
科学分野:
- 地質物理学 地質物理学とは地質物理学です.
- 地震学 地震学とは
- 火山学 火山学とは
背景:
- 地球の地殻のストレス変化の見積もりは,通常,地表近くの変形モデルに依存しています.
- 地震の活動はしばしばストレス変化と相関しており,地震性データはストレス推定に使用できる可能性を示唆しています.
- 以前の方法は,地震の発生率とストレス/時間との非線形関係により課題に直面していました.
研究 の 目的:
- 地震発生率からストレス変化を推論するための方法を開発し,検証する.
- 地震性データ分析における非線形性の制限を克服するために.
- 地震発生率をリモートセンシングによるストレス測定ツールとして使用する可能性を評価する.
主な方法:
- 地震発生率データを分析するための2つの新しい逆転方法を開発した.
- 地震発生率のストレスおよび時間依存性に関する配列を組み込んだ.
- キラウエア火山の地震データにこれらの方法を適用しました.
主要な成果:
- ストレス変化を推論するために,地震発生率データを逆転させることに成功した.
- キラウエア火山での推論されたストレス変化と独立した推定値との間で良好な合意を達成しました.
- 遠隔ストレスを検知するための地震速度の実用的な有用性を実証した.
結論:
- 地震発生率は,地球の地殻におけるストレス変化を推論するために信頼できる方法で使用することができます.
- 開発された方法は,従来のストレスの推定技術に有効な代替手段を提供します.
- 地震の地震性は,特に火山地帯では,効果的な遠隔感知ストレスメーターとして機能します.
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