paleoseismology
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Balancing Act: Can Precariously Perched Boulders Signal New York’s Earthquake Risk?
Long ago, melting glaciers dropped giant boulders onto surfaces in the New York City exurbs, and many seem to remain in their original, delicately balanced positions. Can they be used to judge the maximum sizes of past earthquakes?
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Like Fireflies, Earthquakes May Fire in Synchrony
Small Stresses Might Bring Big Results, Says Study