Big quakes can free grounded icebergs

From San Francisco, at a meeting of the American Geophysical Union

COOL GEAR. Instruments installed atop iceberg B15A enable scientists to track its movements. J. Landis/NSF

Sensors installed on an immense iceberg stuck in shallow water off Antarctica have relayed data suggesting that the ground motions spawned by large, distant earthquakes can set such grounded icebergs afloat again.