Dept. of Geology
Portland State University
Ph.D., UC Santa Cruz 1981
B.S., Boston College 1976
I am a geophysicist with interests in tectonic plate motions, crustal deformation, earthquakes, GPS and seismology.
of transient strain rates in CA since 1992 (2nd invariant)
Appearance in OPB Oregon Field Guide's
2015 GPS velocity field map
(North America reference)
2015 PNW vectors file
(North America reference, from McCaffrey et al., 2016).
NY Times article
Stone Age Apocalypse
about eruption of Toba.
The First EarthScope Institute on the Spectrum of Fault Slip Behaviors
2010 UNAVCO Short Course Series - GAMIT/GLOBK and DEFNODE
National Public Radio story on great earthquakes
Story on AGU presentation in the Honolulu Star Bulletin
Article on Indonesia research
Interview on German radio
My CV (pdf)
Last DB update 3/21/2017