Glacier, fjord, and seismic response to recent large calving events, Jakobshavn Isbræ, Greenland
Article first published online: 18 NOV 2008
Copyright 2008 by the American Geophysical Union.
Geophysical Research Letters
Volume 35, Issue 22, November 2008
How to Cite
2008), Glacier, fjord, and seismic response to recent large calving events, Jakobshavn Isbræ, Greenland, Geophys. Res. Lett., 35, L22501, doi:10.1029/2008GL035281., , , , , and (
- Issue published online: 18 NOV 2008
- Article first published online: 18 NOV 2008
- Manuscript Accepted: 1 OCT 2008
- Manuscript Revised: 16 SEP 2008
- Manuscript Received: 8 JUL 2008
- Jakobshavn Ishbræ;
- glacial earthquakes
 The recent loss of Jakobshavn Isbræ's extensive floating ice tongue has been accompanied by a change in near terminus behavior. Calving currently occurs primarily in summer from a grounded terminus, involves the detachment and overturning of several icebergs within 30–60 min, and produces long-lasting and far-reaching ocean waves and seismic signals, including “glacial earthquakes”. Calving also increases near-terminus glacier velocities by ∼3% but does not cause episodic rapid glacier slip, thereby contradicting the originally proposed glacial earthquake mechanism. We propose that the earthquakes are instead caused by icebergs scraping the fjord bottom during calving.