The Mw 7.9 Denali earthquake
Coseismic and early postseismic deformation

Eric Calais, Andrew Freed, Purdue University
Jeff Freymueller (Geophysical Institute, Fairbanks), Roland Burgmann (UC Berkeley)

Project funded by NSF
Technical support from UNAVCO


The Denali earthquake | Coseismic and early postseismic | CGPS network and position time series | Snapshots of postseismic response


Red squares are pre-existing continuous GPS stations, white squares are additional continuous GPS stations installed after the earthquake to monitor postseismic deformation, blue triangles are near-field campaign GPS sites surveyed after the earthquake.

The coseismic displacements are derived from the GPS position time series by averaging 8 days before the earthquake and 5 days after (find data file here, GAMIT solution).

The calculated coseismic displacements are from a finite element model of the earthquake sequence using a preliminary coseismic slip distribution from seismic inversions (D. Dreger, pers. comm.) (model by A. Freed).

The postseismic displacements are derived from a linear fit to the position time series for the period between days 308 and 365, 2002.