If you're still located in Silicon Valley, you probably would not have felt it. Too great a distance from the epicenter.
Here's an interactive map of the world's volcanos where you can click on a region and get more detail.
http://www.volcano.si.edu/world/find_regions.cfm
Here's the North American Pacific Coast map:
Click on a region and you get a list of volcanos. Here's the one for Oregon:
http://www.volcano.si.edu/world/region.cfm?rnum=1202
Click on an individual volcano name and get lots of historical and current detail and status reports.
3.0 Mcd - NORTHERN CALIFORNIA
Preliminary Earthquake Report Magnitude 3.0 Mcd
Date-Time
* 4 Nov 2009 23:18:35 UTC
* 4 Nov 2009 15:18:35 near epicenter
* 4 Nov 2009 15:18:35 standard time in your timezone
Location 38.822N 122.783W
Depth 2 km
Distances
* 3 km (2 miles) NE (37 degrees) of The Geysers, CA
* 5 km (3 miles) WSW (255 degrees) of Cobb, CA
* 9 km (6 miles) NW (304 degrees) of Anderson Springs, CA
* 42 km (26 miles) N (351 degrees) of Santa Rosa, CA
* 118 km (73 miles) WNW (285 degrees) of Sacramento, CA
