Saint Elmo's Fire - Saint Elmo's Fire

Japanese: セント・エルモの火 - セントエルモのひ(英語表記)Saint Elmo’s fire
Saint Elmo's Fire - Saint Elmo's Fire
A violet-blue flame-like light that appears on the tops of ship masts, church towers, etc. on thunderstorms and stormy nights. It is particularly common on the tops of steep mountains. Long ago, Mediterranean sailors saw it appearing on the masts of their ships and thought it was a sign of protection from St. Elmo (a corrupted version of St. Erasmus, the patron saint of sailors), so they gave it this name. It is a type of discharge phenomenon that occurs when the atmospheric electric field (the ratio of potential difference to distance) on the ground becomes large due to the influence of thick, highly charged clouds (convective clouds) or thunderclouds overhead.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
雷雨やあらしの夜に,船のマスト,教会の塔などの先端に現れる青紫色の炎状の光。急峻な山の頂上でことによく現れる。昔,地中海の船人が船のマストに現れるのを見て,セント・エルモ(船乗りの守護聖人エラスムスSt.Erasmusのなまったもの)の加護のしるしだと考え,こう名付けた。頭上の強く帯電した厚い雲(対流雲)や雷雲の影響で,地表の大気電界(距離に対する電位差の比)が大きくなったときに現れる一種の放電現象である。

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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