Monitors get weird vibes from Antarctic

From Victoria, British Columbia, at a meeting of the Seismological Society of America

BERG-TO-BE. Iceberg B-15B resulted when B-15, its Connecticut-size parent berg seen here, broke in two. J. Landis/National Science Foundation

In August 2000, seismometers on islands in the South Pacific began picking up unusual signals coming from regions even farther south. During the next 5 months, 13 separate groups of pressure waves traveled through the ocean depths for thousands of miles before they smacked into the islands and were converted into detectable ground motions.