...This occurs when one of the convergent boundaries of two plates is on the ocean floor. It was first discovered in 1928 by Kiyoo Wadati as a deep earthquake surface that slopes from the ocean trench to under the land, and in 1954, Hugo Benioff of the United States compiled examples from around the world, so it is also called the Wadati-Benioff zone or simply the Benioff zone. Later, research into the mechanism of earthquakes showed that the hard ocean floor lithosphere bends under the ocean trench and sinks deep into the mantle while rubbing against the land crust. *Some of the terminology referenced in "Benioff, H." is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…二つのプレートの収束境界のうち一方が海底の場合に起こる。海溝から陸の下へ傾いた深発地震面として,1928年に和達清夫によって発見されたのが始まりで,54年にアメリカのベニオフHugo Benioffによって世界各地の例がまとめられたので和達=ベニオフ帯Wadati‐Benioff zoneまたは単にベニオフ帯ともいう。その後,地震の発震機構の研究から,硬い海底リソスフェアが海溝の下で折れ曲がり,陸の地殻とすれ合いながらマントル内深くへ沈み込んでいるようすが示された。… ※「Benioff,H.」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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