carved angel

The quake occurred where two of the giant plates that form the surface of the Earth grind together.

At that spot the Eurasian plate was being pulled downward by the descending Indo-Australian plate. The quake released the edge of the Eurasian plate, which sprang up, lifting the ocean floor and sending the sea water off in the giant wave that killed so many, the researchers reported.

They said the higher sea floor displaced so much water from the Bay of Bengal and the Andaman Sea that sea level worldwide was raised 0.004 inch.

"No point on Earth remained undisturbed," wrote Roger Bilham of the University of Colorado.

Indeed, ground movement of as much as 0.4 inch occurred everywhere on Earth's surface, though it was too small to be felt in most areas.

posted by gish  # 5/19/2005 02:54:00 PM