まとめ
イエローストーン・カルデラは1923年以来,地面レベルが700ミリメートル以上上昇し,急速な上昇を経験しています. この地質学的変形は,表面の下のマグマの最近の流入によって引き起こされる可能性があります.
科学分野:
- 地質物理学 地質物理学とは地質物理学です.
- 火山学 火山学とは
- ジオデシ (Geodesy) とは
背景:
- イエローストーン・カルデラは,大規模な噴火の歴史を持つ大規模な火山系です.
- 地殻の変形を理解することは,火山活動の監視に不可欠です.
研究 の 目的:
- イエローストーン・カルデラでの地形変形を検出するために,歴史的な正確なレベルアップデータを分析するために.
- 観測された表面の上昇の原因を調査するために.
主な方法:
- 1923年の正確な平準化測定と1975年,1976年,1977年のデータを比較した.
- 時間の経過による垂直地位移動の分析.
主要な成果:
- 1923年以来,イエローストーン・カルデラの相対的な上昇 (700mm以上) が顕著に観測されました.
- 平均上昇率は年間約14mmで,急速な変形を示しています.
- この上昇は,典型的な地質学的プロセスと比較して異常に大きい.
結論:
- 観測された急速な上昇は,イエローストーン・カルデラの下の地殻に溶けた,または部分的に溶けた物質が最近流入したことを示唆しています.
- この地質学的な出来事は,火山系内の潜在的な動乱を示しています.
- このマグマ活動がもたらす影響を理解するためには,継続的なモニタリングが不可欠です.
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