Dr. David Schaff

Lamont Associate Research Professor, Seismology, Geology and Tectonophysics, Lamont-Doherty Earth Observatory (LDEO), Columbia Climate School

108C Seismology
P.O. Box 1000
61 Route 9W
Palisades, NY 10964


My research has involved applying massive waveform cross correlation to earthquake location, earthquake detection, repeating events, measuring temporal changes in the crust associated with large earthquakes, testing competing models of foreshock occurrence, studying the earthquake source using empirical Green’s functions, and nuclear monitoring.


Only select projects listed below
Name Start Date End Date
Analysis of Microseismicty at Parkfield, California, Through Improved Detection and Location 6/1/09 5/31/10
Comprehensive High-Precision Relocation of Global Seismicity 2/1/12 1/31/16
Comprehensive high-precision relocation of global seismicty 2/15/16 1/31/20
Improving Magnitude Detection Thresholds Using Multi-Station, Multi-Event, and Multi-Phase Methods 6/29/05 6/30/08
Investigating the Presence of Preseismic Velocity Changes 9/15/09 8/31/12
Investigation of Data-Intensive Discovery Methods for Improved Seismic Monitoring 5/1/11 8/31/18
Near-Real-Time Monitoring, Analysis and Forecast of Repeating Earthquake in Northern California 1/1/11 12/31/12
Testing Predictions from the Cascade and Pre-Seismic Slip Models for Foreshock Occurrence with the High Precision Catalog for Northern California 4/1/10 3/31/14
Precision Seismic Monitoring in Northern California: Updating and Improving the Real-time Double-difference (RTDD) System 1/1/20 12/31/20
Using a Correlation Detector to Reduce the Magnitude Threshold of a Foreshock and Aftershock Catalog of the 2004 Parkfield Earthquake to Test Models of Foreshock and Aftershock Occurrence 4/1/20 3/31/21
Improving Detection and Location of Small Seismic Events Using Data from A Rare Deployment 5/1/20 4/30/21
Correlation Detection and Location of Small Seismic Events in a Broad Region of Interest using data from a Rare Deployment 9/30/20 9/29/21
Using Repeating Foreshocks as Creep Meters at Depth to Test an Aseismic Pre-slip Model for some Large Earthquakes 5/1/23 4/30/24