TY - JOUR
T1 - Step-wise changes in glacier flow speed coincide with calving and glacial earthquakes at Helheim Glacier, Greenland
AU - Nettles, M.
AU - Larsen, T. B.
AU - Elósegui, P.
AU - Hamilton, G.S.
AU - Stern, L.A.
AU - Ahlstrøm, Andreas P.
AU - Davis, J.L.
AU - Andersen, M.L.
AU - de Juan, J.
AU - Khan, Shfaqat Abbas
AU - Stenseng, Lars
AU - Ekström, G.
AU - Forsberg, René
PY - 2008
Y1 - 2008
N2 - Geodetic observations show several large, sudden increases in flow speed at Helheim Glacier, one of Greenland's largest outlet glaciers, during summer, 2007. These step-like accelerations, detected along the length of the glacier, coincide with teleseismically detected glacial earthquakes and major iceberg calving events. No coseismic offset in the position of the glacier surface is observed; instead, modest tsunamis associated with the glacial earthquakes implicate glacier calving in the seismogenic process. Our results link changes in glacier velocity directly to calving-front behavior at Greenland's largest outlet glaciers, on timescales as short as minutes to hours, and clarify the mechanism by which glacial earthquakes occur. Citation: Nettles, M., et al. (2008), Step-wise changes in glacier flow speed coincide with calving and glacial earthquakes at Helheim Glacier, Greenland.
AB - Geodetic observations show several large, sudden increases in flow speed at Helheim Glacier, one of Greenland's largest outlet glaciers, during summer, 2007. These step-like accelerations, detected along the length of the glacier, coincide with teleseismically detected glacial earthquakes and major iceberg calving events. No coseismic offset in the position of the glacier surface is observed; instead, modest tsunamis associated with the glacial earthquakes implicate glacier calving in the seismogenic process. Our results link changes in glacier velocity directly to calving-front behavior at Greenland's largest outlet glaciers, on timescales as short as minutes to hours, and clarify the mechanism by which glacial earthquakes occur. Citation: Nettles, M., et al. (2008), Step-wise changes in glacier flow speed coincide with calving and glacial earthquakes at Helheim Glacier, Greenland.
U2 - 10.1029/2008GL036127
DO - 10.1029/2008GL036127
M3 - Journal article
SN - 0094-8276
VL - 35
SP - L24503
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 24
ER -