A MAGNITUDE 4.2 EARTHQUAKE OCCURRED THIS AFTERNOON. THE EPICENTER OF THE 2:38 P-M QUAKE WAS 11 MILES SOUTHEAST OF HOLLISTER, AND 17 MILES EAST OF SALINAS. 10 MINUTES LATER THERE WAS AN AFTERSHOCK WITH A MAGNITUDE OF 2.9. THE EPICENTER OF MONDAY’S SWARM OF SMALL QUAKES WAS ALSO NEAR TODAY’S QUAKES.