1. Scaling Relationships Sources –Events from the literature –16 SSE in Cascadia July 1998Aug 1999 Dec 1999Dec 2000 April 2001Feb 2002 Feb 2003Jan 2004 May 2004July 2004April 2005Sept 2005 Jan 2006Jan 2007July 2007May 2008

2. Prepared by Haiying Gao

5. The potential for using InSAR to study slow slip Previous attempts – Holtkamp et al. (Fall AGU, 2008) Benefits – Broad coverage – Most sensitive to vertical deformation Problems – Vegetation and steep topography – Low amplitude, long wavelength signals – Temporal sampling Platforms – ERS/ENVISAT (C-band) – RADARSAT (C-band) – ALOS (L-band) One example: 2007 slow slip event

6. 1/5/2007 - 2/20/2007 -30-20-10010 range-change (mm) -3-201 range-change (mm) -4 Predicted Interferogram LOS

8. 0 1 2 3 4 5 Reverse slip (cm) M w = 6.1 to 6.7 ∆  = 0.06 to 0.1 MPa Prop. rate = 6.4 km/day 16 Slow Slip Events July 1998Aug 1999Dec 1999Dec 2000 April 2001Feb 2002Feb 2003Jan 2004 May 2004July 2004April 2005Sept 2005 Jan 2006Jan 2007July 2007May 2008

9. Prepared by Haiying Gao