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View Full Version : ESA Watches Earthquakes Shake the Sky



Fraser
2005-Sep-23, 10:41 AM
SUMMARY: When a powerful earthquake shook the ground in Alaska a year ago, it also set the Earth's atmosphere shaking. A team of European scientists used the Global Positioning System to map disturbances in the Earth's ionosphere after a 7.9 magnitude earthquake struck Denali, Alaska. The ionosphere starts at 75 km and goes up to 1,000 km altitude, and it amplifies any disturbance that happens on the ground beneath it - one millimeter disturbance on the ground could become a 100 metre oscillation at 75 km altitude. This gives scientists a new tool to track earthquakes around the world.

View full article (http://www.universetoday.com/am/publish/earthquake_detection_esa_method.html)
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