EESA06H3 Lecture : chap3.docx

40 views3 pages
24 Oct 2012
School
Course
Professor

Document Summary

An earthquake is a trembling or shaking of the ground caused by the sudden release of energy stored in the rocks beneath earth"s surface. Seismic waves are the waves of energy produced by an earthquake and cause ground to tremble and shake. Breaks between two rock masses is called a fault. Classic explanation for why earthquakes takeplace is called elastic rebound theory which involves sudden release of progressively stored elastic strain energy in rocks, causing movement along a fault. The deep seated internal forces (tectonic forces) act on a mass of rock over many decades. Rocks on surface are brittle, rocks deep in the earth are ductile. Volcanic eruptions and mineral transformations may also cause earthquakes, not just fault movements. Focus or hypocentre is the point of the earthquake where the seismic waves first originate. The epicenter is the point on the earth"s surface directly above the focus.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents