California quake early warning tests reach Pasadena
In Pasadena Elizabeth Cochran watched a simulated earthquake alert unfold on her computer as a 4.2 tremor struck Southern California. The U S government has quietly tested early warning since February. alerts are not yet broadcast to the public, leaving the system crude and limited to scientists.
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Pasadena
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Elizabeth Cochran
California
Los Angeles
Cochrar
Japan
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Cochran
Falling space debris objects orbit near Earth report
The Air Force says thousands of objects now orbit Earth as space debris. The latest major increase occurred in 2009 after a collision between a US satellite and a Russian satellite, creating many fragments floating in orbit.
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Air Force
Predicting Where Falling Satellite Will Hit Earth
NASA scientists outline the uncertain forecast for the 6 ton UARS debris due to reentry later this week with a strike zone spanning most of Earth. They estimate 1 in 3,200 chance of hurt and emphasize pieces may reach 300 pounds each spread over a 500 mile band.
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Jonathan McDowell
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Harvard-Smithsonian Center For Astrophysics
Cambridge
Mass
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Alberta
Canada
Aberdeen
Scotland
Cape Horn
South America
Antarctica
UARS
International Space Station
Russia
Pacific
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