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Topic: Good Friday Earthquake


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  EARTHQUAKE,
Earthquake waves were observed in this and other ways for centuries, but more scientific theories as to the causes of quakes were not proposed until modern times.
Until 1979 an earthquake of magnitude 8.5 was thought to be the most powerful possible; since then, however, improvements in seismic measuring techniques have enabled seismologists to refine the scale, and 9.5 is now considered to be the practical limit.
Intensities II to III on the Mercalli scale are roughly equal to magnitudes 3 to 4 on the Richter scale, and XI to XII to 8 to 9.
www.history.com /encyclopedia.do?articleId=208119   (2460 words)

  
 Valdez, Alaska > History > 1964 "Good Friday" Earthquake
It was the second largest earthquake ever recorded, second only to Chile in 1960, which experienced a quake of 9.5 Moment Magnitude (Mw).
The epicenter of this awesome quake was a mere 45 miles west of Valdez and 14 miles under the earth's crust.
The earthquake triggered a huge submarine slide that caused millions of cubic yards of earth to slide into the Valdez Bay.
www.valdezalaska.org /history/earthquake.html   (413 words)

  
 Good Friday Earthquake - Biocrawler
The Good Friday Earthquake (also called the Great Alaska Earthquake) of March 27, 1964, was the most powerful earthquake in U.S. history.
The magnitude 9.2 earthquake, which resulted in 131 deaths, was centered in Prince William Sound off the coast of South Central Alaska.
131 people were killed as a result of the earthquake: nine in the earthquake itself, 106 from tsunamis in Alaska, and 16 from tsunamis elsewhere.
www.biocrawler.com /encyclopedia/Good_Friday_Earthquake   (572 words)

  
  Earthquakes!
Earthquakes are caused by forces deep within Earth's interior that continuously affect its surface.
Three of the ten largest earthquakes of the twentieth century occurred in Alaska, striking in 1957, 1964, and 1965.
The Alaskan Good Friday earthquake was followed by tsunami, or tidal waves, that reached 50 feet high and traveled a phenomenal 8,445 miles at 450 miles per hour.
www.infoplease.com /spot/earthquake1.html   (544 words)

  
  Earthquake K-12 Experiments & Background Information
Earthquakes occurring at boundaries of tectonic plates are called interplate earthquakes, while the less frequent events that occur in the interior of the lithospheric plates are called intraplate earthquakes.
Some earthquakes are the result of a number of anthropogenic sources, such as extraction of minerals and fossil fuel from the Earth's crust, the removal or injection of fluids into the crust, reservoir-induced seismicity, massive explosions, and collapse of large buildings.
Earthquakes have also been known to be caused by the removal of natural gas from subsurface deposits, for instance in the northern Netherlands.
www.juliantrubin.com /encyclopedia/earthsciences/earthquake.html   (3077 words)

  
 Earthquake - Free net encyclopedia   (Site not responding. Last check: 2007-10-23)
Most earthquakes are tectonic, but they 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 hundreds of kilometres, 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 such as these, that are caused by human activity, are referred to by the term induced seismicity.
www.netipedia.com /index.php/Earthquake   (2359 words)

  
 1964 Alaska Earthquake   (Site not responding. Last check: 2007-10-23)
Earthquakes in Southcentral Alaska are indeed frequent and often powerful, although traditionally not as destructive of those in places such as California.
Southcentral Alaska’s earthquakes are a result of the subduction of the Pacific Plate and the pressure it exerts on the terranes than form southern Alaska.
Earthquakes along this type of fault are generally smaller than those created in subduction faults, but they occur at shallower depths and may therefore wreak more havoc on the surface.
www.alaskageography.com /essays/earthquake.htm   (1870 words)

  
 CalendarHome.com - - Calendar Encyclopedia   (Site not responding. Last check: 2007-10-23)
The magnitude 9.2 earthquake, which resulted in 131 deaths, was centered in Prince William Sound off the coast of South Central Alaska.
The powerful earthquake also caused some parts of Alaska to be liquefied, causing much damage to property and leading to landslides.
131 people were killed as a result of the earthquake: nine in the earthquake itself, 106 from tsunamis in Alaska, and 16 from tsunamis in Oregon and California.
encyclopedia.calendarhome.com /cgi-bin/encyclopedia.pl?p=Good_Friday_Earthquake   (804 words)

  
 Stories in the News (Sitnews) - Ketchikan, Alaska - News, Features, Opinions...
It was only because the earthquake occurred late in the day of a holiday and in a less populous region that loss of lives and property were not considerably higher.
By all accounts, the March 27, 1964, Good Friday earthquake and the tsunamis that followed in its wake were simply terrifying, an ordeal to be endured.
The effects of the earthquake were also felt worldwide ­ boats off the Gulf Coast of Louisiana sank from the sloshing of water resulting from the quake's force, and the earthquake was recorded on tide gages in Cuba and Puerto Rico.
www.sitnews.us /0304news/032704/032704_ak_earthquake.html   (1754 words)

  
 USGS Release: 40th Anniversary of "Good Friday" Earthquake Offers New Opportunities for Public and Building Safety ...
It was only because the earthquake occurred late in the day of a holiday and in a less populous region that loss of lives and property were not considerably higher.
By all accounts, the March 27, 1964, Good Friday earthquake and the tsunamis that followed in its wake were simply terrifying, an ordeal to be endured.
The effects of the earthquake were also felt worldwide — boats off the Gulf Coast of Louisiana sank from the sloshing of water resulting from the quake’s force, and the earthquake was recorded on tide gages in Cuba and Puerto Rico.
www.usgs.gov /newsroom/article.asp?ID=106   (1719 words)

  
 TSUNAMI FROM EARTHQUAKE
Since 1900, the only earthquakes recorded with a greater magnitude were the 1960 Great Chilean Earthquake (magnitude 9.5) and two Alaskan quakes: the 1964 Good Friday Earthquake in Prince William Sound (9.2) and a March 9, 1957 quake in the Andreanof Islands (9.1).
Each of these megathrust earthquakes also spawned tsunamis (in the Pacific Ocean), but the death toll from these was significantly lower — a few thousand for the worst one — probably because of the lower population density along the coasts near affected areas and the much greater distances to more populated coasts.
The deadliest earthquakes since 1900 were the Tangshan, China earthquake of 1976, in which at least 255,000 were killed, the earthquake of 1927 in Xining, Qinghai, China (200,000), the Great Kanto earthquake which struck Tokyo in 1923 (143,000), and the Gansu, China earthquake of 1920 (200,000).
home.123india.com /alokghosh/fillers4/tsunami_from_earthquake.htm   (2913 words)

  
 Amateur Geologist: Earthquake Severity
Earthquakes are the result of forces deep within the Earth's interior that continuously affect the surface of the Earth.
The magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs.
Earthquakes with magnitude of about 2.0 or less are usually called microearthquakes; they are not commonly felt by people and are generally recorded only on local seismographs.
www.amateurgeologist.com /content/features/facts/earthquakes/severityusgs.html   (1474 words)

  
 Earthquakes!
There are thousands upon thousands of earthquakes annually, ranging on average from 18 major quakes to more than 2 million very minor ones per year (approximately 8,000 per day).
The deadliest earthquake of all time is believed to have occurred on Jan. 24, 1556, in Shaanxi (Shensi) Province, China — 830,000 were killed.
In addition to earthquakes, volcanoes can cause tsunami—after the eruption of Krakatoa on August 27, 1883, more than 36,000 people were killed by the tsunami alone.
www.factmonster.com /spot/earthquake1.html   (527 words)

  
 Earthquake 1   (Site not responding. Last check: 2007-10-23)
The largest magnitude recorded in the U.S. was the Good Friday earthquake in Anchorage, AK on March 28, 1964.
A tsunami is an underwater earthquake or landslide displacing the ocean water.
The intensity of an earthquake is a measure of the shaking associated with an earthquake, and it does vary with location.
uashome.alaska.edu /~jsaa5/Index.htm   (331 words)

  
 Good Friday Earthquake - Wikipedia, the free encyclopedia
The Good Friday Earthquake (also called the Great Alaska Earthquake) of Friday, March 27, 1964, 5:36 P.M. ADT (03:36 3/28 UTC) was the second most powerful earthquake in U.S. and North American history after magnitude 9.5 earthquake in Chile 1960.
The duration of rupture lasted approximately 4 minutes (240 seconds.) As of 2006, The magnitude 9.2 earthquake, which resulted in 115 deaths, was centered in Prince William Sound off the coast of South Central Alaska.
The powerful earthquake also caused some parts of Alaska to be liquefied, causing much damage to property and leading to landslides.
en.wikipedia.org /wiki/Good_Friday_Earthquake   (700 words)

  
 Important.ca. Asia Earthquake, Tsunami Information Resource
Since 1900, the only earthquakes recorded with a greater magnitude were the 1960 Great Chilean Earthquake (magnitude 9.5), the 1964 Good Friday Earthquake in Prince William Sound (9.2), and the March 9, 1957 earthquake in the Andreanof Islands (9.1).
The earthquake itself (apart from the tsunamis) was felt as far away as Bangladesh, India, Malaysia, Myanmar, Thailand, Singapore and the Maldives.
The shaking of the seabed by the earthquake displaced massive volumes of water, resulting in tsunamis that struck the coasts of the Indian Ocean; the deadliest tsunamis by far in all of recorded history.
www.important.ca /tsunami_asia_earthquake.html   (1688 words)

  
 Earthquake Page
I could not have an earthquake page and not include the 1964 Good Friday Earthquake in Anchorage Alaksa, where my family lives and where I was born and raised.
The second largest earthquake of the 20th Century and the largest ever recorded in the northern hemisphere,occurred in Alaska on March 27, 1964.
There is a 67 percent probability of an earthquake with a magnitude of 7.0 or larger occurring on the San Andreas, Hayward, or Rodgers Creek faults in the San Francisco Bay Area.
www.jalone.com /id36.html   (232 words)

  
 EARTHQUAKE MONITORING LINKS
Earthquakes, greater than magnitude 2, in the states of Washington and Oregon.
Of the 10 strongest earthquakes ever recorded in the world, three were in Alaska, including the March 27, 1964, Good Friday earthquake, with a magnitude of 9.2.
IRAN - Experts say a major earthquake in the sprawling capital of Tehran is overdue - and at least one local professor says when it comes, it could kill 1.4 million people and wreck 60 percent of the city.
www.angelfire.com /on/predictions/earthquakes.html   (547 words)

  
 The March 27, 1964, Great Alaska Earthquake
The tectonic dislocations associated with the Alaska earthquake of 27 March 1964 ranged over a distance of 800 km, from the upper portion of Prince William Sound to southwest of the Trinity Islands, in the Gulf of Alaska.
These estimates were then used to calculate the total earthquake energy that contributed to the generation of the open sea tsunami in the Gulf of Alaska, and not for the tsunami waves generated in the Prince William Sound.
Earthquake shock waves lasting approximately 3 minutes caused extensive damage or total destruction to buildings and houses over a large area of approximately 30 city blocks, mostly in the downtown area.
www.drgeorgepc.com /Earthquake1964Alaska.html   (2100 words)

  
 Good Friday Earthquake : Great Alaska earthquake   (Site not responding. Last check: 2007-10-23)
The Good Friday Earthquake, also "Great Alaska Earthquake" of March 27, 1964 was the single most powerful earthquake in United States history.
The epicenter of the magnitude 9.2 earthquake was in Prince William Sound in South Central Alaska.
The earthquake resulted in the deaths of 125 people, almost all from the resulting tsunamis that plagued the fjords of Prince William Sound and the Kenai Peninsula[?].
www.explainthis.info /gr/great-alaska-earthquake.html   (260 words)

  
 Online NewsHour: Predicting Earthquakes
The deepest earthquakes typically occur at plate boundaries where the Earth's crust is being subducted into the Earth's mantle.
When the Chilean earthquake occurred in 1960, the largest earthquake recorded since 1900 at 9.5 magnitude, seismographs recorded seismic waves that traveled all around the Earth for days after the event.
Earthquakes with magnitude of about 2.0 or less are usually called microearthquakes; they are not commonly felt by people and are generally recorded only on local seismographs.
www.pbs.org /newshour/science/earthquake/facts.html   (762 words)

  
 The day the earth shook   (Site not responding. Last check: 2007-10-23)
There were thousands of aftershocks associated with the earthquake; some of them with magnitudes greater than 6.0, and almost 600 that had a magnitude greater than or equal to 4.4.
The earthquake occurred along an asperity in the fault, and for at least part of the earthquake a circular-type rupture occurred (Ruff et al., 1983).
Subduction zones with large earthquakes (as in the 1964 Alaska earthquake) tend to have faults with large asperities (Ruff et al., 1983).
www.msu.edu /~hammon27/Alaskapaper.htm   (1389 words)

  
 Earthquake FAQ 1B. Magnitude of Eastern U.S. Earthquakes   (Site not responding. Last check: 2007-10-23)
The offshore earthquake caused landslides at Hilo, opening of fissures from Pahala to Kilauea and a tsunami which crested at 60 feet at Kau-Puma coast, at 10 feet at Hilo and at 8 feet at Kealukua.
As a result of this earthquake and a magnitude 6.5 tremor in the San Fernando Valley of California in 1971, the federal government greatly expanded its research on earthquakes.
As a result of this earthquake and the magnitude 1964 Good Friday earthquake in Alaska, the federal government greatly expanded its earthquake research and re-evaluated seismic design for hospitals and other critical facilities.
geology.er.usgs.gov /eastern/earthquakes/faq1b.html   (1006 words)

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