Another magnitude 4.2 earthquake occurred in Baja California early this morning, west of a similar-sized one last night. The western-most large blue square is the location of a quake at 2:41 am local time, with the one to the northeast showing last night's 8:19 pm event. The most recent event is about 47 miles SSW of Mexicali.
This morning's event shows up much smaller on the Wintersburg AZ seismic station at left on the 8:00-10:00 GMT time line. Last night's event is the more prominent event above it.