自然灾害是指大气、地质或水文等因素造成的灾变，包括地震、火山爆发、泥石流、海啸、洪水和干旱等。
Natural disasters are catastrophic events with atmospheric, geologic, and hydrologic origins. Disasters include earthquakes, volcanic eruptions, landslides, tsunamis, floods, and drought.
过去的十年里，洪水、旱灾、暴风雨、地震、台风、火山爆发和森林火灾变得越来越频繁。
In the last decade, floods, droughts, windstorms, earthquakes, typhoons, volcanic eruptions and froese fires have become increasingly common.
一个垂向序列代表了一次地震灾变事件。
A vertical succession represents a seismic catastrophic event.
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