More Earthquakes Shake Southern California

"Double-Quake" - More Earthquakes Shake Yorba Linda Area

Back-to-back magnitude-4.5 and -3.4 earthquakes were reported Wednesday morning near Yorba Linda area, just hours after a magnitude-4.4 quake and several aftershocks were reported in the area.

Wednesday's earthquake was reported at 9:33 a.m. about one mile northeast of Yorba Linda. A magnitude-3.4 quake was reported at 9:51 a.m. in the same area.

"It's hard to tell if this was a quake or aftershock because they were in the same area and same magnitude, so I would call this a double-quake," said Dr. Kate Hutton, staff seismologist at Caltech. "I would call this a cluster or quake swarm. We can expect to see more small quakes-aftershocks."

By 12:30 p.m., more than 10 quakes had been reported in the area:

• 9:33 a.m. - magnitude 4.5
• 9:40 a.m. - magnitude 1.2
• 9:44 a.m. - magnitude 1.6
• 9:47 a.m. - magnitude 2.2
• 9:51 a.m. - magnitude 3.4
• 9:54 a.m. - magnitude 2.1
• 9:57 a.m. - magnitude 1.6
• 10:31 a.m. - magnitude 1.4
• 10:36 a.m. - magnitude 2.9
• 10:44 a.m. - magnitude 1.6
• 10:53 a.m. - magnitude 1.8
• 12:22 p.m. - magnitude 2.7
• 12:56 p.m. - magnitude 1.4
• 1:12 p.m. - magnitude 1.5
• 1:30 p.m. - magnitude 2.2

Earthquakes List: Second Greater Los Angeles Area