PSN-L Email List Message
Subject: Researchers Track Underwater Noise Generated by December 26 Earthquake
From: Mark Robinson mark.robinson@...............
Date: Sun, 24 Jul 2005 18:41:39 +1200
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> The Sound of a Distant Rumble:
> Researchers Track Underwater Noise Generated by December 26 Earthquake
> When the sea floor off the coast of Sumatra split on the morning of December 26, 2004, it took days to measure the full extent of the rupture. Recently, researchers at Columbia University's Lamont-Doherty Earth Observatory analyzed recordings of the underwater sound produced by the magnitude 9.3 earthquake. Their unique approach enabled them to track the rupture as it moved along the Sumatra-Andaman Fault, raising the possibility that scientists could one day use the method to track underwater earthquakes in near real time and opening new avenues in seismologic research.
> "We were able to constrain some details such as the speed and duration of the rupture more accurately than traditional seismic methods," said Maya Tolstoy, a Doherty Research Scientist and lead author of the study. "Moreover, we found the earthquake happened in two distinct phases, with faster rupture to the south and slower to the north, almost as if there were two back-to-back events." The study appears in the July/August edition of Seismological Research Letters.
(slashdot pointed to this today : http://science.slashdot.org/article.pl?sid=05/07/23/2120242&tid=14 )
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