Publication Date:
2017-04-04
Description:
Ice streams play a major role in the ice mass balance and in the reckoning of the global sea level;
they have therefore been object of wide scientific interest in the last three decades. During the
21st Italian Antarctic Expedition, in the austral summer 2005-06, we deployed a joint
seismographic and geodetic network in the area of the David Glacier, Southern Victoria Land.
This campaign followed a similar experiment carried out in the same area during the austral
summer 2003-04 with the deployment of a seismographic network that recorded significant
microseismicity beneath the David Glacier, primarily occurring as a few small clusters. In the
latest 2005-06 deployment, 7 seismographic stations and 3 GPS geodetic receivers operated
continuously for a period of 3 months (November 2005-early February 2006) in an area of about
100x150 km2 around the David Glacier. We have carried out several analyses using the
combined data sets. These included the examination of the temporal evolution in earthquake
magnitude and location and also the contemporaneous observation of both seismic activity and
surface kinematics of the ice stream to possibly correlate the recorded microseismicity with the
movement of the glacier, affected by the Ross Sea tides. Here we present some details of the two
temporary networks and preliminary results and implications.
Description:
Submitted
Description:
3.3. Geodinamica e struttura dell'interno della Terra
Description:
open
Keywords:
Ice dynamics
;
02. Cryosphere::02.02. Glaciers::02.02.05. Ice dynamics
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
book chapter