This catalog includes large events (Mw > 6) inferred from the time dependent inversion of 3-component GPS time series. Events on central and southern Cascadia are poorly resolved (and not included) because of the sparse GPS network prior to ~2007.
| Date | Location# | Mw | Ave Slip$ |
| Jul 1998 | Port Angeles | 6.5 | 2.6 cm |
| Aug 1999 | Port Angeles | 6.6 | 2.1 |
| Dec 1999 | SW Washington | 6.3 | 2.4 |
| Dec 2000 | Port Angeles | 6.3 | 2.6 |
| Apr 2001 | SW Washington | 6.2 | 1.5 |
| Feb 2002 | Port Angeles | 6.3 | 1.7 |
| Feb 2003% | SW Washington | 6.2 | 1.7 |
| Feb 2003% | Olympia | 5.9 | 1.5 |
| Feb 2003% | Port Angeles | 6.1 | 2.1 |
| Jan 2004 | Port Angeles | 6.0 | 2.1 |
| May 2004 | SW Washington | 6.4 | 2.7 |
| Jul 2004 | Port Angeles | 6.2 | 2.5 |
| Apr 2005 | Tacoma | 6.2 | 2.2 |
| Sep 2005 | Port Angeles | 6.4 | 3.9 |
| Jan 2006 | SW Washington | 6.1 | 1.9 |
| Jan 2007 | Port Angeles | 6.3 | 3.9 |
| Jul 2007 | S Oregon | 5.9 | 2.7 |
| May 2008 | Port Angeles | 6.4 | 2.1 |
| Apr 2009 | Port Angeles | 6.7 | 1.4 |
| Aug 2009 | Portland | 6.4 | 2.8 |
| Aug 2010 | Port Angeles |
# Approximate location of event or where maximum fault slip is inferred.
$ Values represent the average slip for fault elements with slip greater than 0.5 mm.
% The 2003 event has been divided into 3 distinct sub-events which are separated in time.
| sliprate_1998-2008.mov | Movie file showing the distributed slip rate on the plate interface for consecutive events. |
For more information, refer to:
Schmidt , D. A. and H. Gao (2010), Source parameters and time-dependent slip distributions of slow slip events on the Cascadia subduction zone from 1998 to 2008, J. Geophys. Res., 115, B00A18, doi:10.1029/2008JB006045. Abstract
Gao, H., D. A. Schmidt, and R. Weldon (2012), Scaling relationships of source parameters for slow slip events Bull. Seis. Soc. Am., 102, 1, 352-360, doi:10.1785/0120110096. Abstract | Supplementary Table