Omori's formula (English)
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In the case of a shallow earthquake, if the time difference between the arrival time of the P wave and the S wave at the observation point (initial tremor time) is t seconds, the epicentral distance is ⊿ km. ⊿＝7.42 t The following relationship holds. This was proposed by Fusakichi Omori, the founder of seismology in Japan. Source: Asakura Publishing Dictionary of Laws Information |
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浅発地震の場合に，P波とS波の観測地点に到達する時間の差（初期微動時間）を t 秒としたとき，震央距離 ⊿ kmとの間には ⊿＝7.42t という関係が成立する．わが国の地震学の開祖大森房吉の提案したものである． 出典 朝倉書店法則の辞典について 情報 |
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