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A geohazard is a geological state that may lead to widespread damage or risk.〔(International Centre for Geohazards )〕 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). ==Geohazards== Human activities, such as drilling through overpressured zones—could result in significant risk, and as such mitigation and prevention are paramount, through improved understanding of geohazards, their preconditions, causes and implications. In other cases, particularly in montane regions, natural processes can cause catalytic events of a complex nature, such as an avalanche hitting a lake causes a debris flow, with consequences potentially hundreds of miles away, or creating a lahar by volcanism. The continued and multi-disciplinary investigation into the occurrence and implications of geohazards, in particular offshore geohazards in relation with the oil and gas exploration, lead to specific mitigation studies and establishing relevant prevention mechanisms. * (Submarine) Landslides * Debris flows * Shallow gas accumulation * Overpressured zones (including gas and shallow water flows) * Naturally occurring gas hydrates and their climate-controlled meta-stability * Mud flows, diapirism and volcanism/volcanoes * Flood basalt * Earthquakes and seismicity * Tsunamis from tectonics and landslides * Rock falls and landslides 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Geohazard」の詳細全文を読む スポンサード リンク
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