April 1 GSP Meeting
Penn Brewery, Pittsburgh REGISTER
8.8 Magnitude Earthquake at Maule, Chile:
the Geodetic Emergency Response
Dr. Dana Caccamise
The 27 February 2010 (M 8.8) Maule, Chile Earthquake, the 6th largest earthquake ever recorded, occurred in south-central Chile and partially overlaps the rupture area of the 1960 (M 9.5) Valdivia Earthquake, the largest earthquake ever recorded. The 2010 megathrust occurred in an area that has been studied by our geodesy and geodynamics group and collaborators since 1993, and the coseismic displacement field was recorded by dozens of continuous GPS (CGPS) stations in the region. At the time, the Maule event was only the second enormous megathrust event to occur in the modern times of space geodesy (being more accessible than the previous event in 2004, Indonesia), and the US National Science Foundation funded major scientific responses (i.e., seismological, geomorphological and InSAR characterizations) so as to capture its coseismic and postseismic deformation field in unprecedented detail.
The presentation will provide an overview of our geodetic response some of the implications of the plate interface, some of the human impacts from the earthquake processes and aftermath of the event, including locating and steering the drilling operation for the recovery of the Chilean miners following the famous mining accident. This event is arguably one of the most carefully studied earthquakes in history.