Magnitude-3.8 quake is nothing. The quakes of that mangnitude happen here in Japan almost every day. You know how many quakes have so far happened today here in Japan? Just ten quakes whose magnitude ranges from 2.8 to 4.2.
Magnitude-3.8 quake centered on coast west of downtown LA jolts Southern California; no damage or injuries: http://apne.ws/MHMw4F -BW