I was awake seven minute prior to the quake (maybe there were undetectable shock waves preceding the big rumble). This one lasted a relatively long time and I couldn't figure out the epicenter or magnitude right away. Here (east SF Bay) it felt like a 4.6 or 4.8, as no items were flying off the shelves as they would have been with a mag. 5 or greater.
Its been a few hours since I last perused the USGS site with a list of all recent earthquakes.. so Im not certain what magnitude tremblors may have preceeded the 6.0 quake. we have aftershocks so Id suspect there may have been “foreshocks” as well.