Author: Eri Goto
Source: The Asahi Shimbin 
July 22, 2012
"Shapes in the coral in the Sumatra Basin have left a terrifying message for Indonesians.
Kerry Sieh and Danny Natawidjaja studied patterns in the reefs created by hundreds of years of seismic activity and believe the area may be entering a high-activity phase that could hammer the area with a series of massive earthquakes.
When a large quake occurs, the seabed in the basin is lifted, pushing some parts of the coral reef above the ocean surface. That exposed area stops growing but the submerged part continues to thrive, marking the coral with patterns that Sieh and Natawidjaja believe chronicle the area’s frightening geological history."
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