A scale that indicates the strength of earthquake motion at a certain location. Seismic intensity scale. The Japan Meteorological Agency's seismic intensity scale was previously divided into eight scales: 0 (unnoticeable), 1 (slight), 2 (light), 3 (weak), 4 (moderate), 5 (strong), 6 (violent), and 7 (severe). Since 1996, seismic intensity levels of 5 and 6 have been divided into weak and strong, respectively, to create a 10-scale scale. In the past, seismic intensity was estimated based on how it felt on the human body and the surrounding conditions, but since then, seismic intensity meters have been used to automatically observe and report the magnitude. →Magnitude [Additional Information] Japan Meteorological Agency Seismic Intensity Scale Related Explanation Table (Excerpt)
[Synonyms] Earthquake Source: About Shogakukan Digital Daijisen Information | Legend |
ある場所における地震動の強さの程度を表す階級。震度階。気象庁震度階級では、以前は震度0(無感)・1(微震)・2(軽震)・3(弱震)・4(中震)・5(強震)・6(烈震)・7(激震)の8階級に分けていた。平成8年(1996)からは、震度5と6をおのおの弱と強に分けて、10階級で表すようになっている。かつては、人体の受ける感じや周囲の状況などによって推定していたが、この時から、計測震度計により自動的に観測し速報するようになった。→マグニチュード [補説]気象庁震度階級関連解説表(抜粋)
[類語]地震・ 出典 小学館デジタル大辞泉について 情報 | 凡例 |
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