FACTOID # 13: New York has America's lowest percentage of residents who are veterans.
 
 Home   Encyclopedia   Statistics   States A-Z   Flags   Maps   FAQ   About 
   
 
WHAT'S NEW
 

SEARCH ALL

FACTS & STATISTICS    Advanced view

Search encyclopedia, statistics and forums:

 

 

(* = Graphable)

 

 


Encyclopedia > Megathrust earthquake

A megathrust earthquake is an interplate earthquake where one tectonic plate slips beneath (subducts) another. Due to the size of the tectonic plates and the shallow dip of the plate boundary, these earthquakes are among the world's largest, with moment magnitudes that can exceed 9.0. An interplate earthquake is an earthquake that occurs at the boundary between two tectonic plates. ... The tectonic plates of the world were mapped in the second half of the 20th century. ... Subduction zones mark sites of convective downwelling of the Earths lithosphere. ... Dip can have many meanings: In the context of geology: Stratigraphic dip is defined as the maximum angle from the horizontal in the plane of a stratigraphic unit. ... The moment magnitude scale (a successor to the Richter scale), was introduced in 1979 by Tom Hanks and Hiroo Kanamori and is used by seismologists to compare the energy released by earthquakes. ...


For the most part they occur in the Pacific and Indian Oceans and are connected to the Ring of Fire. Since these earthquakes deform the ocean floor, they almost always generate a significant tsunami. hi ... The Ring of Fire is a zone of frequent earthquakes and volcanic eruptions that encircles the basin of the Pacific Ocean. ... The tsunami that struck Malé in the Maldives on December 26, 2004. ...


All five earthquakes since 1900 of magnitude 9 or greater have been megathrust earthquakes. 1900 is a common year starting on Monday. ...


Some examples of megathrust earthquakes are:

Events January 1 - Russia accepts Julian calendar. ... The Cascadia Earthquake was a magnitude 8. ... hi ... The North American plate is shown in brown on this map The North American Plate is a continental tectonic plate covering the continent of North America, extending eastward to the Mid-Atlantic Ridge and westward to the Cherskiy Range in East Siberia. ... Events 12 February — The San Carlo, the oldest working opera house in Europe, is inaugurated. ... Kamchatka earthquakes were a pair of megathrust earthquakes occurring off the coast of the Kamchatka Peninsula, in Russia on October 16, 1737, and on November 4, 1952, in the magnitude of 9. ... The Pacific plate is shown in pale yellow on this map The Pacific Plate is an oceanic tectonic plate beneath the Pacific Ocean. ... The Okhotsk Plate is a continental tectonic plate covering the Sea of Okhotsk, the Kamchatka Peninsula, and Eastern Japan. ... 1952 - Wikipedia, the free encyclopedia /**/ @import /skins-1. ... Kamchatka earthquakes were a pair of megathrust earthquakes occurring off the coast of the Kamchatka Peninsula, in Russia on October 16, 1737, and on November 4, 1952, in the magnitude of 9. ... The Pacific plate is shown in pale yellow on this map The Pacific Plate is an oceanic tectonic plate beneath the Pacific Ocean. ... The Okhotsk Plate is a continental tectonic plate covering the Sea of Okhotsk, the Kamchatka Peninsula, and Eastern Japan. ... 1957 was a common year starting on Tuesday of the Gregorian calendar. ... The Andreanof Islands are a group of islands in the Aleutian Islands in southwest Alaska between the Rat Islands group, to the west and the Fox Islands group, to the east, at about 52° North and 172°57 to 179°09 West. ... The Pacific plate is shown in pale yellow on this map The Pacific Plate is an oceanic tectonic plate beneath the Pacific Ocean. ... The North American plate is shown in brown on this map The North American Plate is a continental tectonic plate covering the continent of North America, extending eastward to the Mid-Atlantic Ridge and westward to the Cherskiy Range in East Siberia. ... 1960 was a leap year starting on Friday (link will take you to calendar). ... The Great Chilean Earthquake of May 22, 1960 is the largest magnitude earthquake in recorded history. ... The Nazca plate is shown in light blue on this map The Nazca Plate is an oceanic tectonic plate in the eastern Pacific Ocean basin off the west coast of South America. ... The South American Plate is a continental tectonic plate covering the continent of South America and extending eastward to the Mid-Atlantic Ridge. ... 1964 was a leap year starting on Wednesday (link will take you to calendar). ... Epicenter The Good Friday Earthquake (also called the Great Alaska Earthquake) of March 27, 1964, was the most powerful earthquake in U.S. history. ... The Pacific plate is shown in pale yellow on this map The Pacific Plate is an oceanic tectonic plate beneath the Pacific Ocean. ... The North American plate is shown in brown on this map The North American Plate is a continental tectonic plate covering the continent of North America, extending eastward to the Mid-Atlantic Ridge and westward to the Cherskiy Range in East Siberia. ... The December 2004 Indian Ocean tsunami hits Thailand The 2004 Indian Ocean earthquake, known by the scientific community as the Sumatra-Andaman earthquake, was an undersea earthquake that occurred at 00:58:53 UTC (07:58:53 local time) on December 26, 2004. ... India Plate - Wikipedia, the free encyclopedia /**/ @import /skins-1. ... The Burma Plate is a small tectonic plate located in Southeast Asia, often considered a part of the larger Eurasian Plate. ...

External links

  • National Resources Canada: FAQ on megathrust earthquakes


  Results from FactBites:
 
What is a megathrust earthquake? (616 words)
All recorded earthquakes in British Columbia and in the offshore have occurred either within the Juan de Fuca or the North American plates.
The apparent inactivity within the zone of contact between the Juan de Fuca and North American plates suggests that either the two plates are locked together and are accumulating strain or that the contact zone is well lubricated and the plates are moving smoothly past each other.
After the earthquake, the strain accumulated is released and vertical deformation results in the over-riding plate that is the reverse of that seen during stress build up.
Earthquake at AllExperts (1944 words)
Earthquakes also occur in volcanic regions and as the result of a number of anthropogenic sources, such as reservoir induced seismicity, mining and the removal or injection of fluids into the crust.
Deep focus earthquakes, at depths of 100's km, are possibly generated as subducted lithospheric material catastrophically undergoes a phase transition since at the pressures and temperatures present at such depth elastic strain cannot be supported.
Earthquakes have also been known to be caused by the removal of natural gas from subsurface deposits, for instance in the northern Netherlands.
  More results at FactBites »

 
 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your comments

Want to know more?
Search encyclopedia, statistics and forums:

 


Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms, 1022, m