Geological Hazards
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Geological hazards include internal health processes, such as earthquakes, volcanic activity & emissions, and related geophysical processes such as mass movements, landslides, rockslides, surface collapses & debris or mud flows.
Photo by peterme
Hydrometeorological factors are important contributors to some of these processes.
Photo by Julian Evil
Earthquake (in Bohol)
Earthquakes result from the sudden shifting of the earth’s crust below or at the surface, causing ground vibrations & shocks.
Photo by digitalsadhu
TWO types of Earthquake:
1.Tectonic-earthquakes produced by sudden movement along faults & plate boundaries.
Photo by Jens Aber
2. Volcanic-earthquakes produced by movement of magma beneath volcanoes.
Photo by martinluff
Faults-are fractures in the earth’s surface where rock movements have taken place & earthquakes have been produced.
An active fault is defined as a fault, which has moved within the last 10,000years.
Active faults & trenches are the earthquake generators in the Ph. An average of 20 EQ is recorded per day in the Ph
Hazards associated with EQ..ground shaking; ground rapture; Liquefaction
Is there a fault line in Cavite?
Tsunami
Photo by Stephen Ransom Photography
It is a chain of fast moving waves that send surges of water onto land, sometimes reaching a height of 100feet.
Photo by twicepix
It can travel as fast as 600mph; wavelength can reach up to 100-200kms.
Photo by Todd Turner
Tsunamis are generated either by earthquakes, volcanic eruptions, landslides or meteor impact.
Photo by Oregon Sea Grant
