Executive Committee, Working Group on California Earthquake Probabilities (2004-)
Reviewer, USGS National Seismic Hazard Map (2000-1)
Panel Member, NSF Continental Dynamics Program (1996-2001)
Visiting Professor, Chulalongkorn University , Thailand (1997)
Professeur Invité à Jussieu, Paris VII, et à Orsay, Paris-Sud , France (1993-4)
Visiting Professor, Universidad Nacional Autonoma de Mexico (1994)
Presidential Young Investigator Award (1990-1995)
USGS National Earthquake Prediction Evaluation Council (1989-1994)
USGS National Earthquake Hazard Reduction Panels (1989-98)
Geological Society of America (1978- )
Sigma Xi, Scientific Research Society (1978- )
American Geophysical Union (1980- )
Seismological Society of America (1991- )