Avi Blizovsky
US Geological Survey GPS receiver
Direct link to this page: https://www.hayadan.org.il/gps090205.html
To better study the phenomenon of earthquakes, scientists must create appropriate simulations and simulations. A pioneering technology developed on the basis of data collected from the positioning satellite system, the GPS made it possible for the first time to produce a motion picture depicting an earthquake. In the animated film, we see how the Earth's surface is deformed due to an earthquake with a magnitude of 8.3 on the Richter scale like the one that hit the coast of the Japanese island of Hokkaido in September 2003.
Seismographs that monitor earthquakes and measure the acceleration movements that occur in the earth's crust plates, did not provide calculations about the movement of the surface of the globe that occurs in a fraction of a second. The measuring devices themselves are very sensitive, and indicate any change - but do not provide an accurate calculation. Especially not when a powerful earthquake occurs.
Satellite array receivers for positioning and navigation are also not sensitive, but they are rigid and strong enough to operate even due to a large earthquake. They then provide accurate position measurement even in such a situation. Behind the innovation is an American space and aviation engineer, Dr. Christine Larson from the University of Colorado, a pioneer in the use of GPS data for seismology.
An array of more than a thousand GPS receivers at control and monitoring stations in Japan alone recorded the earthquake that occurred in Hokkaido. Each receiver measured a position to the second with an accuracy of millimeters. Following this, all the collected information was uploaded to a computer that created an animated film in which seismic waves are seen.
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