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Huge landslide at La Conchita, 1995. A geologic hazard or geohazard is an adverse geologic condition capable of causing widespread damage or loss of property and life. [1] These hazards are geological and environmental conditions and involve long-term or short-term geological processes.
GeoHazards International (GHI) is a 501(c)(3) non-profit organization dedicated to ending preventable death and suffering caused by natural disasters in the world's most vulnerable communities.
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Hazard maps are created and used in conjunction with several natural disasters. [1] Different hazard maps have different uses. For instance, the hazard map created by the Rizal Geological Survey is used by Rizalian insurance agencies in order to properly adjust insurance for people living in hazardous areas. [2]
The International Centre for Geohazards (ICG) is a Norwegian, multidisciplinary research and educational institute, hosted at the Norwegian Geotechnical Institute (NGI). ). According to the institute's website, [1] ICG's research activities focus on the assessment, prevention and mitigation of geohazards, in which the latter is defined as a geological state that represents or has the potential ...
The magma, geothermal activity, and hydrothermal system can lead to caldera motion, ash clouds, and earthquakes, so the Yellowstone Caldera is labeled as a geohazard. [8] A large amount of the Yellowstone Plateau volcanic field is in the Yellowstone National Park. [5] [4] [8] [9]
Tephra is a generalized word for the various bits of debris launched out of a volcano during an eruption, regardless of their size. [4] Pyroclastic materials are generally categorized according to size: dust measures at <1/8 mm, ash is 1/8–2 mm, cinders are 2–64 mm, and bombs and blocks are both >64 mm. [5] Different hazards are associated with the different kinds of pyroclastic materials.
Surface motion map for a hypothetical earthquake on the northern portion of the Hayward Fault Zone and its presumed northern extension, the Rodgers Creek Fault Zone. A seismic hazard is the probability that an earthquake will occur in a given geographic area, within a given window of time, and with ground motion intensity exceeding a given threshold.