DIFFERENT EFFECTS OF GEOLOGIC ACTIVITIES

D I F F E RENT EFFECTS OF GEOLOGIC ACTIVITIES.

G E O H A ZARDS. Mankind lives on the earth. While the ground upon which we live seems to be, for the most part, firm, stable and static, in actuality it is dynamic and in a continual state of flux as the lithosphere (the earth's outermost crust) adjusts to the Earth's inner, molten core. In addition, wind, rain, rivers and streams, and human activity continually modify the earth’s surface. Geologic Hazards are naturally occurring (or man-made) geologic conditions capable of causing damage or loss of property and/or life. Geologic Hazards Mitigation is the application of geologic engineering principles to minimize or prevent the effects of naturally occurring geologic hazards..

EARTHQUAKES - LIQUEFACTION (SOILS), TSUNAM IS. Geologic hazards phenomena can occur suddenly, or slowly. Sudden phenomena include:.

The primary effects of earthquakes are ground shaking, ground rupture, landslides, tsunamis, and liquefaction. Fires are probably the single most important secondary effect of earthquakes..

V O L C A N IC E R U P T ION S. Volcanoes have a large effect on their locality. They produce ash, lava, volcanic bombs , pyroclastic flows and lahars . Ash from large volcanoes has been known to affect global climates. The effects of volcanoes can be both positive and negative..

L A N D S L I DE S. ― Irene M. Pepperberg. The impact of a landslide can be extensive, including loss of life, destruction of infrastructure, damage to land and loss of natural resources. Landslide material can also block rivers and increase the risk of floods..

F L O O D S. As floodwaters spread they can threaten lives, inundate properties and businesses, destroy belongings, damage vital infrastructure and prevent access to essential public services. Often the effects of flood are long term and can be very costly, disruptive and distressing for communities involved..

Power supplies can be cut off. A powerful avalanche can even destroy buildings and people can also be killed. 90 percent of people who die in avalanches trigger them themselves. People usually die from a lack of oxygen when buried in snow, rather than from getting too cold..

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