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+ - Satellite system will speed up tsunami warnings->

Submitted by ananyo
ananyo (2519492) writes "NASA and a group of universities known as the READI network have begun testing an earthquake-warning system based on satellite data from the Global Positioning System (http://www.nature.com/news/satellite-system-will-speed-up-tsunami-warnings-1.10480). The method could have allowed Japanese officials to issue accurate warnings of the deadly March 2011 earthquake and tsunami (http://news.slashdot.org/story/11/12/07/0427217/merging-tsunami-amplified-destruction-in-japan) ten times faster than they did, say scientists.
The system is currently being tested using the US Pacific Northwest Geodetic Array: hundreds of GPS receivers placed along the North American coast between Northern California and British Columbia in Canada.
While conventional seismometers provide similar information, they run into trouble with earthquakes of magnitude 7 or higher. This is partly because in big quakes, the ground may shake for longer, but not significantly harder. GPS has no such problem, because it directly measures the movement of the ground."

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Satellite system will speed up tsunami warnings

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