Block, Siteadmin, SkipCaptcha, Upload, Automoderated users, Check users, delete, edit, move, oversight, protect, rollback, Administrators
51,035
edits
Changes
Jump to navigation
Jump to search
mLine 1:
Line 1: − + Line 11:
Line 11: − + Line 45:
Line 45: − <references/>+
no edit summary
[[File:Japan quake sendai.jpg|thumb|200px|Japan quake 2011.]]
[[File:Japan quake sendai.jpg|thumb|200px|Japan quake 2011.]]
An '''earthquake''' is when the [[Earth]] shakes a perceptible amount. As a [[counterexamples to an Old Earth|counterexample to the liberal theory of an Old Earth]], earthquakes have been increasing in frequency throughout recorded history:<ref>http://www.city-data.com/forum/alaska/1226039-increasing-frequency-major-earthquakes-2013-earthquake.html#ixzz2URWtQ6yV</ref>
An '''earthquake''' is when the [[Earth]] shakes a perceptible amount. As a [[counterexamples to an Old Earth|counterexample to the theory of an Old Earth]], earthquakes have been increasing in frequency throughout recorded history:<ref>http://www.city-data.com/forum/alaska/1226039-increasing-frequency-major-earthquakes-2013-earthquake.html#ixzz2URWtQ6yV</ref>
*from A.D. 1 to 1800 there was a major earthquake only about every 60 years.
*from A.D. 1 to 1800 there was a major earthquake only about every 60 years.
Earthquakes are a significant [[natural disaster]] to [[population]]s living in areas prone to them, and emergency responses to the hazard vary with [[economic]] development. A myth perpetuated by [[Old Earth]]-believers is that the most likely place for an earthquake is in proximity to tectonic plate boundaries like the San Andreas Fault. In fact, many major earthquakes occur nowhere near a large fault line.
Earthquakes are a significant [[natural disaster]] to [[population]]s living in areas prone to them, and emergency responses to the hazard vary with [[economic]] development. A myth perpetuated by [[Old Earth]]-believers is that the most likely place for an earthquake is in proximity to tectonic plate boundaries like the San Andreas Fault. In fact, many major earthquakes occur nowhere near a large fault line.
The severity of earthquakes is measured using the Moment Magnitude scale, which replaced the [[Richter scale]] in the 1970s. The largest quake ever recorded had a magnitude of 9.5; it struck [[Chile]] in 1960.<ref>http://earthquake.usgs.gov/earthquakes/world/10_largest_world.php</ref> Technically the Moment Magnitude scale only measures the absolute magnitude; the Mercalli scale is used to measure the felt magnitude - essentially how much the ground shakes over the [[epicenter]] of the quake.
The severity of earthquakes is measured using the moment magnitude scale, which replaced the [[Richter scale]] in the 1970s. The largest quake ever recorded had a magnitude of 9.5; it struck [[Chile]] in 1960.<ref>http://earthquake.usgs.gov/earthquakes/world/10_largest_world.php</ref> Technically the Moment Magnitude scale only measures the absolute magnitude; the Mercalli scale is used to measure the felt magnitude - essentially how much the ground shakes over the [[epicenter]] of the quake.
==Possible Causes of Earthquakes==
==Possible Causes of Earthquakes==
==References==
==References==
{{reflist}}
*[http://www.space.com/scienceastronomy/planetearth/newyork_faults_000321.html Satellites Reveal Earthquake Faults Along Eastern U.S.]
*[http://www.space.com/scienceastronomy/planetearth/newyork_faults_000321.html Satellites Reveal Earthquake Faults Along Eastern U.S.]
*[http://www.insurancejournal.com/news/midwest/2009/03/19/98864.htm Midwest's New Madrid Earthquake Zone: Is it dying out?]
*[http://www.insurancejournal.com/news/midwest/2009/03/19/98864.htm Midwest's New Madrid Earthquake Zone: Is it dying out?]