余震

• 読み: よしん
• ローマ字: yoshin
• 漢字の分解: 余 (yo) — remaining, lingering; 震 (shin) — earthquake, tremor
• 発音: /jo.ɕin/

意味

Aftershock. A smaller earthquake that occurs in the same region after a larger main earthquake, as the crust adjusts to the stress changes caused by the primary event.

A compound noun used extensively in Japanese seismology and daily life, given Japan's position on the Pacific Ring of Fire. Following a major 本震 (main earthquake), 余震 can continue for weeks or months, sometimes reaching magnitudes strong enough to cause further damage. Japanese disaster agencies issue 余震情報 to inform the public of expected frequency and intensity. The word is among the most practically important in Japanese disaster vocabulary.

例文

1. 本震から数日が経った今も断続的に余震が続き、住民は不安な夜を過ごしている。
2. 余震の揺れに備えて、倒れやすい家具はすべて固定しておくことが推奨される。
3. マグニチュード7クラスの地震の後には、大規模な余震が発生する可能性が高い。

使い方ガイド

場面: seismology, disaster management, news

トーン: informational

起源と歴史

Sino-Japanese compound. 余 (yo) means remaining, surplus, or lingering, and 震 (shin) means earthquake or tremor. Together they describe seismic activity that lingers after the main event.

文化的背景

時代: Modern

世代: All ages

社会的背景: Universal