Map of Chilean Earthquake Coseismic Displacement derived from GPS Data

The Central and Southern Andes GPS Project (CAP) team led by Mike Bevis at Ohio State University have computed the coseismic displacement field associated with the recent M 8.8 Maule earthquake in south-central Chile. Peak measured displacement is 3.04 meters near the city of Concepcion, Chile.

While the CAP results were obtained from processing days worth of observations from before and after the earthquake, another procedure was used at the University of New Brunswick to estimate the shift in position of a GPS station near Concepcion. Precise point positioning was used to determine the position of the station every 30 seconds during the hour of the earthquake (06:00-07:00 UTC). Results show that most of the approximately 3-meter displacement occurred within about 60 seconds of the onset of the earthquake. A precise trajectory of the station during the earthquake will be determined once the high-rate (1 Hz) data currently stored at the station is made available when normal communications with the station are restored.

https://listserv.unb.ca