Early Warnings Labs had 29 users in the immediate area of the earthquake that shook the Orange County and Southern California area on the morning of January 25th.  Nine early warnings alerts met the users’ threshold and were delivered with an early warning time of 11 seconds.
http://www.latimes.com/local/lanow/la-me-earthquakesa-earthquake-41-quake-strikes-near-temescal-calif-sizb-story.html

ShakeMap: https://earthquake.usgs.gov/earthquakes/eventpage/ci38092312#shakemap