Could radio waves predict earthquakes?
Scientists are examining the possibility of using radio waves
to predict the location, time and magnitude of earthquakes.
Earthquakes such as the one that struck the Kashmir region of Pakistan
last month kill thousands of people each year but at present there
is no method of forecasting when they might strike.
Now some geophysicists believe that it might be possible to predict
earthquakes by measuring either electromagnetic pulses in the earth's
crust or disturbances in the ionosphere. Such pulses and disturbances
have been detected prior to a number of major earthquakes.
No-one is certain what causes them but Colin Price, a geophysicist
at Tel Aviv University in Israel , has speculated that the ground
pulses are caused by the fracturing of rocks containing magnetic
particles. As these rocks crack in the seismic events prior to an
earthquake, they generate ultra low frequency radio waves.
Interestingly, these radio pulses are generated as much as two
weeks before some earthquakes take place.
By detecting these signals, therefore, it might be possible to develop
an earthquake early warning system that would give people plenty
of time to evacuate buildings before an earthquake strikes, saving
thousands of lives every year
Source: GB2RS News - Courtesy of the
RSGB
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