Seasonality and Increasing Frequency of Greenland Glacial Earthquakes

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Science  24 Mar 2006:
Vol. 311, Issue 5768, pp. 1756-1758
DOI: 10.1126/science.1122112

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Some glaciers and ice streams periodically lurch forward with sufficient force to generate emissions of elastic waves that are recorded on seismometers worldwide. Such glacial earthquakes on Greenland show a strong seasonality as well as a doubling of their rate of occurrence over the past 5 years. These temporal patterns suggest a link to the hydrological cycle and are indicative of a dynamic glacial response to changing climate conditions.

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