| What We Learn from the
Oceans Using Sound Waves |
| Earthquakes

Throughout
its history, Turkey, which lies above a seismically active plate
boundary, has suffered enormous consequences from high magnitude
earthquakes. In two 1999 earthquakes, tens of thousands of lives
were lost throughout a 100-mile-long corridor including Istanbul
and regions to its east. Much of the infrastructure was flattened,
including the structure seen here.
Photograph: Leonardo Seeber |
•
From sub-seafloor imaging, scientists can compile records of the
timing and magnitude of historical earthquakes. Dating these earthquakes
can inform us of the time intervals that occurred between quakes,
and potentially signal the next one. Research in the Marmara Sea
examined numerous earthquakes from the Northern Anatolian Fault.
One of these quakes killed nearly 20,000 people in Istanbul, Turkey
in August 1999. Marine research led scientists to conclude that
another event was likely to strike the same region. Based on the
resulting scientific report, engineers closed school buildings that
had been only slightly damaged in this August earthquake. Three
months later, the predicted earthquake did strike and flattened
several buildings. Similar research is now taking place off the
coast of Seattle, Washington, where a long history of major earthquake
activity has been documented.
For More on Earthquake Research:
News Release 08/08/03:
Columbia University Researcher Develops New Use For Seismic Reflection
Data: Revealing Locations And Potentials For Mega Earthquake |
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Last
Updated: January 29, 2004
© 2003
Lamont-Doherty Earth Observatory. All Rights Reserved. |