Occurrence of earthquake, Biology

Among the different natural hazards, earthquakes happen to be the most feared and dangerous because of their sudden impact and the devastation they cause in a matter of few seconds. Earthquake occurs mainly due to fracturing of the rocks in the earth's crust. Large and small internal forces e.g. contraction, expansion, uplifting, depression, folding and faulting bring earth movements.

The most occurring earthquake in the world are tectonic earthquakes which originate at depth not more than tens of kilometers. An earthquake is called shallow focus earthquake if it occurs at a depth of less than 70 km. if the range of focal depth is from 70 to 300 km them it is known as mid focus or intermediate depth earthquake. At greater depth ranging from 300 km to 700 km deep focus earthquakes occur.

Earthquakes also occur in volcanic regions due to tectonic fault as well as by the movement of magna in volcanoes. This type of earthquake gives an early warning of volcanic eruption, sometimes a series of earthquakes occur in a sort of earthquake storm, where the earthquakes strike a fault in clusters, each triggered by the stress distribution of the previous earthquake.

 

 

Posted Date: 7/12/2012 3:23:16 AM | Location : United States







Related Discussions:- Occurrence of earthquake, Assignment Help, Ask Question on Occurrence of earthquake, Get Answer, Expert's Help, Occurrence of earthquake Discussions

Write discussion on Occurrence of earthquake
Your posts are moderated
Related Questions
AMOEBA Systematic  Position Amoeba  was discovered by  Russel von Rosenhoff in  1755. He  called it the little proteus  after the mythical  sea god who is believed to be c

Ulcerative enteritis (quail disease) Ulcerative enteritis, caused by Clostridium colinum, is found in chicken, quails, pheasants, turkeys and some other birds. Clostridial or

What are enzymes? What is the importance of enzymes for living beings? Enzymes are proteins that are catalysts of chemical reactions. From Chemistry it is called that catalysts

Hounsfield Units: It is an arbitrary scale of gray values for CT. It is an indicator of bone density: - Trabecular bone has a range of 200 - Cortical bone has a range


Q What are the two major types of endocytosis? Endocytosis is the entry of material in the cell engulfed by portions of the cell membrane. Endocytosis can be classified as p

Use of repellents Avoidance and early removal of ticks are the first steps in prevention of Lyme disease. In highly endemic areas, when an engorged Ixodes scapularis tick is at

Define the Buffer capacity - Nutritional Biochemistry? Buffer capacity can be defined as, 'the capacity of a solution to resist changes in pH on the addition of strong acid or

Explain Subclavian Flap Aortoplasty ? Initial steps are same as for resection and end-to-end anastomosis. After exposing a the entire length of intra thoracic segment of left s

The food components are in the form of solids, in solutions or in the form of colloids - sols or emulsions. The properties of these components determine the quality of food. The