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Wiktionary
geohazard

n. A geological hazard, such as the risk of a landslide or tsunami.

Wikipedia
Geohazard

A geohazard is a geological state that may lead to widespread damage or risk. Geohazards are geological and environmental conditions and involve long-term or short-term geological processes. Geohazards can be relatively small features, but they can also attain huge dimensions (e.g., submarine or surface landslide) and affect local and regional socio-economy to a large extent (e.g., tsunamis).