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Seasonality and Increasing Frequency of Greenland Glacial Earthquakes
Göran Ekström,1*Meredith Nettles,2Victor C. Tsai1
Some glaciers and ice streams periodically lurch forward withsufficient force to generate emissions of elastic waves thatare recorded on seismometers worldwide. Such glacial earthquakeson Greenland show a strong seasonality as well as a doublingof their rate of occurrence over the past 5 years. These temporalpatterns suggest a link to the hydrological cycle and are indicativeof a dynamic glacial response to changing climate conditions.
1 Department of Earth and Planetary Sciences, Harvard University, 20 Oxford Street, Cambridge, MA 02138, USA. 2 Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA.
* To whom correspondence should be addressed. E-mail: ekstrom{at}seismology.harvard.edu
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