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
how to burn more and more adipose tissues

In the scientific competition against fixism what are the main arguments that favor evolutionism? The major arguments in favor of evolutionism are: paleontological, from the st

When the standard free energy of a reaction is -5.7 kj/mol then at equilibrium a- there will be 10 times more products than reactants b-there will be 10000 times more product

Pathophysiology   Leukocytes develop fiom stem cells located in the bone marrow. During  leukocyte maturation, cells become committed  to specific cell types and develop  throu

Define lipids 'lipids' defines substances as oils, fats and waxes which can be only characterized by a large array of properties.  They are in general: -  coming from plant

A mother has brought her 2-week-old infant to the emergency department due to the baby's persistent and increasing jaundice. Blood testing reveals that the infant's unconjugated bi

Q What is the system that permits fixation and movement to echinoderms? The system that permits fixation and movement to substrates in echinoderms is called the ambulacral syst

1. Discuss how nursing has changed over the last two (2) decades. 2. Review and summarise the philosophy of your enrolled nurse course and its relevance to your clinical practic

Global Air Circulation The major wind systems of the earth result because large masses of air around the earth's equator are forced to rise from the bottom due to surface heati

What is Septal Ablation (TASH/PTSMA) ? This is a nonsurgical interventional treatment. The septal myocardium supplied by 1 st septal branch of left anterior descending artery