TAG: tsunami

Researchers See Ionospheric Signature of North Korean Nuclear Test

February 15, 2013By

The explosion of an underground nuclear device by North Korea this week disturbed the Earth’s ionosphere. The blast generated infrasonic waves that propagated all the way to the upper atmosphere causing small variations in the density of electrons there. By analyzing the signals from GPS satellites collected at ground-based monitoring stations in South Korea and Japan, scientists at the California Institute of... read more

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Innovation: Tsunami Detection by GPS

June 18, 2012By

How Ionospheric Observations Might Improve the Global Warning System The December 26, 2004 earthquake-generated Sumatra tsunami caused enormous losses in life and property, even in locations relatively far away from the epicentral area. The losses would likely have never been so massive had an effective worldwide tsunami warning system been in place. A tsunami travels relatively slowly and it takes... read more

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