New Madrid Fault Lines Shaking: Illinois earthquake
Seismic activity along the New Madrid Fault lines on April 18 caused a massive earthquake in the Midwest states of Illinois and Indiana,United States. The earth quake did not result in major structural damage. The earthquake reached 5.2 on the Richter scale. The New Madrid Fault lines, also known as the New Madrid Seismic Zone or the Reelfoot Rift, runs across Illinois, Indiana, Missouri, Arkansas, Kentucky and Tennessee. A group of scientists recently has been touting a theory that gauges the risks posed by the New Madrid fault as minimal.
Earth quake severity and Richter scale:
Under 6.0 At most slight damage to well-designed buildings. Can cause major damage to poorly constructed buildings over small regions.
6.1-6.9 Can be destructive in areas up to about 100 kilometers across where people live.
7.0-7.9 Major earthquake. Can cause serious damage over larger areas.
8 or greater Great earthquake. Can cause serious damage in areas several
hundred kilometers across.