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- Hello everyone! This will be a section called “Weather In the News” and It will feature Weather Info that has made the news. Hope this will be informational and helpful to many. If you want to send any weather info that youve seen mentioned on the news just contact WeatherAdvance. Thank you and take care.
* Articles are not written by WeatherAdvance *
-Miller Hyatt
NASA: Quake Shifted Earth’s Axis, Shortened Day
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Chilean Quake May Have Shortened Earth Days 03.01.10 This view of Earth comes from NASA’s Moderate Resolution Imaging Spectroradiometer aboard the Terra satellite. › Full resolution jpeg (180 Kb) The Feb. 27 magnitude 8.8 earthquake in Chile may have shortened the length of each Earth day. JPL research scientist Richard Gross computed how Earth’s rotation should have changed as a result of the Feb. 27 quake. Using a complex model, he and fellow scientists came up with a preliminary calculation that the quake should have shortened the length of an Earth day by about 1.26 microseconds (a microsecond is one millionth of a second). Perhaps more impressive is how much the quake shifted Earth’s axis. Gross calculates the quake should have moved Earth’s figure axis (the axis about which Earth’s mass is balanced) by 2.7 milliarcseconds (about 8 centimeters, or 3 inches). Earth’s figure axis is not the same as its north-south axis; they are offset by about 10 meters (about 33 feet). By comparison, Gross said the same model estimated the 2004 magnitude 9.1 Sumatran earthquake should have shortened the length of day by 6.8 microseconds and shifted Earth’s axis by 2.32 milliarcseconds (about 7 centimeters, or 2.76 inches). Gross said that even though the Chilean earthquake is much smaller than the Sumatran quake, it is predicted to have changed the position of the figure axis by a bit more for two reasons. First, unlike the 2004 Sumatran earthquake, which was located near the equator, the 2010 Chilean earthquake was located in Earth’s mid-latitudes, which makes it more effective in shifting Earth’s figure axis. Second, the fault responsible for the 2010 Chiliean earthquake dips into Earth at a slightly steeper angle than does the fault responsible for the 2004 Sumatran earthquake. This makes the Chile fault more effective in moving Earth’s mass vertically and hence more effective in shifting Earth’s figure axis. Gross said the Chile predictions will likely change as data on the quake are further refined. Alan Buis 818-354-0880 alan.buis@jpl.nasa.gov 2010-071 “ *Article found at http://www.nasa.gov/topics/earth/features/earth-20100301.html*
This view of Earth comes from NASA’s Moderate Resolution Imaging Spectroradiometer aboard the Terra satellite. › Full resolution jpeg (180 Kb)
The Feb. 27 magnitude 8.8 earthquake in Chile may have shortened the length of each Earth day.
JPL research scientist Richard Gross computed how Earth’s rotation should have changed as a result of the Feb. 27 quake. Using a complex model, he and fellow scientists came up with a preliminary calculation that the quake should have shortened the length of an Earth day by about 1.26 microseconds (a microsecond is one millionth of a second).
Perhaps more impressive is how much the quake shifted Earth’s axis. Gross calculates the quake should have moved Earth’s figure axis (the axis about which Earth’s mass is balanced) by 2.7 milliarcseconds (about 8 centimeters, or 3 inches). Earth’s figure axis is not the same as its north-south axis; they are offset by about 10 meters (about 33 feet).
By comparison, Gross said the same model estimated the 2004 magnitude 9.1 Sumatran earthquake should have shortened the length of day by 6.8 microseconds and shifted Earth’s axis by 2.32 milliarcseconds (about 7 centimeters, or 2.76 inches).
Gross said that even though the Chilean earthquake is much smaller than the Sumatran quake, it is predicted to have changed the position of the figure axis by a bit more for two reasons. First, unlike the 2004 Sumatran earthquake, which was located near the equator, the 2010 Chilean earthquake was located in Earth’s mid-latitudes, which makes it more effective in shifting Earth’s figure axis. Second, the fault responsible for the 2010 Chiliean earthquake dips into Earth at a slightly steeper angle than does the fault responsible for the 2004 Sumatran earthquake. This makes the Chile fault more effective in moving Earth’s mass vertically and hence more effective in shifting Earth’s figure axis.
Gross said the Chile predictions will likely change as data on the quake are further refined.
2010-071 “
“NASA Unveils Amazing Images of Earth
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The National Aeronautics and Space Administration (NASA) has unveiled its most advanced assembly of satellite observations. Scientists took the latest series of images and disclosed the most detailed views of the Earth’s oceans and land masses. The images, taken in 1968, 1972, and 2007, showcase how far NASA has come in revealing higher resolution satellite imagery. (Photos courtesy of NASA) The NASA Satellite Terra captured the pictures while orbiting 435 miles above the Earth. Known as ‘blue marble’ images, the photographs caught by NASA satellites are known for their high resolution. The process for one blue marble image is quite painstaking, with scientists tediously investigating satellite pictures, being careful to eliminate view-inhibiting clouds. NASA began photographing the Earth from space satellites during the 1960s. Story by AccuWeather.com’s Carly Porter. “ *Article Found at http://www.accuweather.com/blogs/news/story/25665/nasa-unveils-amazing-images-of.asp*
The National Aeronautics and Space Administration (NASA) has unveiled its most advanced assembly of satellite observations.
Scientists took the latest series of images and disclosed the most detailed views of the Earth’s oceans and land masses.
The images, taken in 1968, 1972, and 2007, showcase how far NASA has come in revealing higher resolution satellite imagery. (Photos courtesy of NASA)
The NASA Satellite Terra captured the pictures while orbiting 435 miles above the Earth.
Known as ‘blue marble’ images, the photographs caught by NASA satellites are known for their high resolution.
The process for one blue marble image is quite painstaking, with scientists tediously investigating satellite pictures, being careful to eliminate view-inhibiting clouds.
NASA began photographing the Earth from space satellites during the 1960s.
*Article Found at http://www.accuweather.com/blogs/news/story/25665/nasa-unveils-amazing-images-of.asp*
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