震央距
震央距（粵拼：zan3 joeng1 keoi5，英文：epicentral distance），廣東珠三角又嗌震中距（zan3 zung1 keoi5），係喺地面受地震影響嘅任一點到震央嘅距離。佢分有地方震、近震、及遠震三種。其中：
- 地方震：震央距＜100km。
- 近震：100km≤震央距＜1000km。
- 遠震：震央距≥1000km。
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