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In February
2010, a massive earthquake struck central Chile and caused untold damage to
life and property. It ranks as the sixth largest earthquake ever to be recorded
by a seismograph. The earthquake, like all big earthquakes occurred due to
collision of oceanic and continental plates. Now, a team of scientists are
trying to analyze how water trapped between the two plates contributes to the
buildup of pressure along the fault lines, ultimately resulting in an
earthquake, according to a press release Friday.
Led by Onno
Oncken, scientists from the GFZ German Research Centre for Geosciences and from
Liverpool University have used the 2010 Chile earthquake as a case study to
explain how water pressure in the pores of the rocks lining the plate boundary
zone causes an earthquake.Mechanical coupling between the oceanic and
continental plates results in one plate moving under the other. This process is
call subduction and occurs at the boundaries of the plates. Subduction results
in build-up of stress along the fault lines and the subsequent release of
seismic energy in the form of an earthquake. Lateral extent of the rupture and
magnitude of these events ultimately depends on the distribution and pressure
of fluids along the plate interface.
Read the full story: www.isciencetimes.com
Related: The World's 10 Cities in Most At Risk Of Being Hit By Natural Disasters
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