Download - LATEST EARTHQUAKES
LATEST EARTHQUAKES
http://earthquake.usgs.gov/
EARTHQUAKES IN THE USA
• Earthquakes are one of the most costly natural hazards faced by
the Nation,• A significant risk to 75 million
Americans in 39 Stateshttp://
pubs.usgs.gov/fs/2006/3016/2006-3016.pdf
EARTHQUAKES IN THE USA
• The largest recorded earthquake in the United States was a magnitude 9.2 that struck Prince William Sound, Alaska
on Good Friday, March 28, 1964
• Alaska is the most earthquake-prone state and one of the most seismically
active regions in the world. Alaska experiences a magnitude 7 earthquake
almost every year, and a magnitude 8 or greater earthquake on average every 14
years
• Florida and North Dakota have the smallest number of earthquakes
in the United States• Each year the southern California
area has about 10,000 earthquakes. Most of them are so
small that they are not felt. Only several hundred are greater than
magnitude 3.0, and only about 15-20 are greater than magnitude 4.0.
TODAY IN EQ HISTORY
http://
earthquake.usgs.gov/learning/today/year.php
Deaths in the United States from Earthquakes
http://earthquake.usgs.gov/eqcenter/eqarchives
/
EARTHQUAKES IN ILLINOIS
The historical record of earthquakes having epicenters in Illinois begins on January 8, 1795. Since then there has
been an EQ each year
• The largest ever recorded occurred on November 9, 1968, and measured magnitude 5.4 on the Richter scale.
• The last damaging earthquake in Illinois occurred on June 10, 1987, near Olney in southeast Illinois. This quake
measured 5.0 on the Richter scale
Seismic Hazard Map
Map Earthquakes In Illinois1795 - 2008
• http://www.isgs.uiuc.edu/research/earthquake-hazards/pdf-files/earthquakes-thru-08.pdf
ILLINOIS EQ HISTORY
• http://earthquake.usgs.gov/regional/states/illinois/history.php
Stronger EQ happen outside IL but still have an impact
• The New Madrid Seismic Zone
New Madrid Earthquakes 1811-1812
• 1811, December 16, Northeast Arkansas
Magnitude ~7.2 - 8.1• 1812, January 23, New Madrid, Missouri
Magnitude ~7.0 - 7.8 • 1812, February 7, New Madrid, Missouri
Magnitude ~7.4 - 8.0
• http://earthquake.usgs.gov/regional/states/events/1811-1812.php
POST THE FOLLOWING WEBSITES
• http://www.isgs.uiuc.edu/research/earthquake-hazards/earthquake-haz.shtml
• http://earthquake.usgs.gov/eqcenter/eqarchives/
• http://earthquake.usgs.gov/
ANY QUESTIONS?
EQ’s in IL
• 1909 Aurora, Illinois: Magnitude 5.1, Intensity VII
• 1968 Southern Illinois: Magnitude 5.4, Intensity VII
• 1987 Near Olney, Illinois: Magnitude 5.1
EQ’s in IL
• 2004 June 28: Magnitude 4.2http://earthquake.usgs.gov/eqcenter/eqinthenews/2004/uskgad/• 2006 January 2: Magnitude 3.6 http://earthquake.usgs.gov/eqcenter/eqinthenews/2006/ushkav/• 2008 April 18: Magnitude 5.4
http://earthquake.usgs.gov/eqcenter/eqinthenews/2008/us2008qza6/