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Fastest fault in the world?

Volcanologists often call Hawaii's Kilauea the world's most active volcano - a title bestowed because it erupts so frequently New evidence collected by Global Positioning System satellites suggests that Kilauea may also have the world's fastest-moving fault, reports Susan Owen of the U.S. Geological Survey in Menlo Park, Calif.

Measurements made in 1990 and 1992 show that the volcano's southern flank has edged seaward at a pace of 10 centimeters per year. Owen and her co-workers think the flank is sliding atop a nearly horizontal fault that lies 9 kilometers below the surface. Their calculations suggest that the rock along the fault is slipping at 25 cm per year, making this the fastest known fault, says Owen. Kilauea has generated large quakes in the past, and it remains unclear whether the fast but peaceful motion now going on represents a harbinger of a strong jolt.
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Title Annotation:fault below Hawaii's Kilauea volcano
Author:Monastersky, Richard
Publication:Science News
Article Type:Brief Article
Date:Jun 12, 1993
Words:145
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