There was a M3.3 quake at 11:32 am today which, although the epicenter was in Mexico, might possibly have been felt in the San Diego area. It occurred 26 miles south of San Ysidro.
Note that there was a M4.0 a few miles northwest of Parkfield at 7:25 am this morning. More information about it can be found on the U.S.G.S. Menlo Park office site. Click on the above "Map of recent earthquake activity" and then on the earthquake symbol on the map.
We recorded and analysed 186 earthquakes in the past week. Click here to see a summary and map .
The only quake of any interest overnight was a M2.6 at 7:10 am this morning, 5 miles southwest of Niland. This epicenter is in the Brawley Seismic Zone, a broad band of seismic activity that connects the northern end of the Imperial fault with the southern end of the San Andreas.
At 12:38 am today, there was a small Coso Range quake: a M2.6 located 19 miles east of Coso Junction. Due to its small magnitude and remote location, it was probably not felt.
At 10:57 pm Monday night, there was a M2.6 quake located offshore, 17 miles west-southwest of Pt. Sal. It was not felt.
Tuesday afternoon, at 1:31 pm, there was a M2.6 quake 3 miles northwest of San Ysidro, or 10 miles south-southeast of San Diego. We haven't had any inquiries about this one either, but it is possible that it was felt.
At 10:57 pm last night, there was a M2.6 quake located offshore, 17 miles west-southwest of Pt. Sal. It was not felt.
Early this afternoon, at 1:31 pm, there was a M2.6 quake 3 miles northwest of San Ysidro, or 10 miles south-southeast of San Diego. We haven't had any inquiries about this one either, but it is possible that it was felt.
We've just had another small quake at 8:58 am today: this time a M3.4, located 1 mile north-northwest of Frazier Park. It was reported felt in the Frazier Park area. This location is about 1 mile away from the San Andreas fault, at 14 km. (about 9 miles) depth. The focal mechanism appears to be strike-slip, along an east-west plane, which is not too different from the strike of the San Andreas in that area.
Yesterday evening, at 7:08 pm, a M4.2 occurred 14 miles southwest of Ocotillo. It was followed at 7:22 pm by a a M3.5 aftershocks. Both quakes were reported felt, although I do not have the location of those reporting.
Also, at 4:55 pm, there was a M2.5 Northridge aftershock, located 2 miles north-northeast of San Fernando. It was not felt, as far as we know.
And this morning, at 8:27 am, we just had a M3.5 quake located on the western edge of Imperial Valley, 6 miles south-southwest of Salton City. So far, we have received no inquiries.
We recorded and analysed 179 earthquakes in the past week. Click here to see a summary and map .
Seismicity remains low. The only quake on even slight interest in the past three days was a M2.6 at 7:57 pm yesterday evening, in the Walker Pass area, 21 miles east of Lake Isabella. It was the largest of a small cluster.
At 6:20 pm yesterday, there was a M2.6 felt in the Fontana area. The epicenter was 1 mile south-southwest of Fontana.
Earlier, at 4:48 pm, there was a M2.7 in the Coso Range area, 10 miles north-northeast of Coso Junction. It was not felt, possibly, by coyotes and lizards.
We recorded and analysed 145 earthquakes in the past week. Click here to see a summary and map .
Activity is slow right now. The only mentionable activity overnight was a pair of small events in the Imperial Valley last yesterday afternoon: a M2.4 at 4:16 pm and a M2.5 at 4:19 pm. Both were located near the Imperial fault, 8 miles east-southeast of El Centro. There were no "felt" reports.
The only quake worth mentioning was a M2.7, 3 miles north of Big Bear City, this morning at 3:21 am. This is a Whiskey Springs aftershock. It was not reported felt.
At 1:38 am Saturday morning, there was a M3.0, another member of the Whiskey Springs aftershocks sequence (of the M4.9 on October 26, 1998). The epicenter was 4 miles north of Big Bear City. We got no public inquiries.
Later, at 4:14 am, Santa Cruz Island experienced a small shock: M2.6. It was located 3 miles southwest of the east end of the island. No inquiries here either, not surprisingly.
We also had a M2.7 Sunday night, at 9:35 pm. It was located 7 miles east of Desert Hot Springs. It is no surprise that this one went unfelt, either.
We recorded and analysed 224 earthquakes in the past week. Click here to see a summary and map .
We had a further pair of Obsidian Butte quakes yesterday afternoon, both M2.5 and both located 4 miles east-northeast of Obsidian Butte. The times were 12:15 pm and 12:26 pm. They were probably not felt.
Early this morning, at 5:02 am, there was another quake 16 miles north-northwest of Tehachapi, this time a M3.1. Again, there were no 'felt' reports.
At 7:23 am, there was a M2.5 in the northern Imperial Valley, 4 miles east of Obsidian Butte. As far as we know, it was not felt either.
Yesterday evening, there were two small quakes of interest. The first was a M2.6 at 7:18 pm, located two miles south-southwest of Fontana. We did get some public inquiries on this quake, so it was felt.
35 minutes later, at 7:53 pm, there was a M3.2 quake in the Coso Range, 12 miles east of Coso Junction. This area is inhabited mostly by coyotes and lizards, so we would not expect inquiries. We got none.
At 11:55 pm Saturday night, there was a M3.0 quake in the Tehachapi Mountains, 16 miles north-northwest of Tehachapi. We got no reports of it being felt.
