まとめ
南カリフォルニアは,1960年頃に始まった0.15~0.25メートルの地殻の上昇を経験しています. この地質現象は12,000平方キロメートル以上をカバーし,サンアンドレアス断層とガーロック断層の近くを中心としています.
科学分野:
- 地質物理学 地質物理学とは地質物理学です.
- テクトニクス (地質学) とは
- ジオデシ (Geodesy) とは
背景:
- 南カリフォルニアは,地殻の進行中の変形と移動性を示しています.
- 歴史的な地質調査データは,この地域の構造学的な活動のパターンを明らかにしています.
研究 の 目的:
- カリフォルニア州南部で発生した重要な地殻上昇現象を分析し,報告する.
- この上昇の空間的範囲と時間的進化を定義する.
主な方法:
- 歴史的な地質学的記録の分析.
- 数十年に及ぶ地殻変形データの調査.
主要な成果:
- 1960年ごろから始まった0.15×0.25メートルの地殻の上昇が確認されています.
- この上昇は少なくとも1万2千平方キロメートルに及ぶもので,サンアンドレアス断層に沿って広がり,トランスバース・レンジとモハベブロックにまで及ぶ.
- イベントは,サンアンドレアスとガーロック断層の交差点近くの中心部から,然と成長しているように見えます.
結論:
- 観測された上昇は,既存の変形パターンに重ねた大規模で潜在的にユニークなイベントです.
- この上昇は,1932年以来,大部分の無地震地帯で発生し,異常な構造的活動を強調しています.
- この重要な地殻変形の影響を理解するために,継続的なモニタリングが不可欠です.
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