"The 5.4-magnitude quake — considered moderate — was felt about 11:42 a.m. from Los Angeles to San Diego, and as far east as Las Vegas, 230 miles away. Nearly 30 aftershocks quickly followed, the largest estimated at 3.8. ...
"As strong as it felt, Tuesday's quake was far less powerful than the deadly magnitude-6.7 Northridge earthquake that toppled bridges and buildings on Jan. 17, 1994. That was the last damaging temblor in Southern California, though not the biggest. A 7.1 quake struck the desert in 1999. "
A little earthquake, but no reason to panic. Jon was nice enough to call to make sure we were all okay, though.