IMPERIAL COUNTY, CA — A preliminary 4.3 magnitude quake was registered near Calipatria Friday morning, the U.S. Geological Survey reported.

A tremor hit the region at 2:55 a.m. The earthquake’s epicenter was situated roughly 7 miles west-northwest of Calipatria and occurred at a depth of 7 miles.

Did you feel it?

You can let the USGS know if you noticed the quake by filling out their Felt Report form. The agency has received 29 responses on its online form so far, from people indicating they experienced the tremor. Light shaking was observed, and people in several cities—including Imperial, Brawley and Calipatria—reported feeling the earthquake, according to the USGS DYFI report.

Impact and estimated losses

Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage. Recent earthquakes in this area have caused secondary hazards such as landslides and liquefaction that might have contributed to losses.

Structure information summary
Overall, the population in this region resides in structures that are resistant to earthquake shaking, though vulnerable structures exist. The predominant vulnerable building types are unreinforced brick masonry and reinforced masonry construction.

Historical information
A magnitude 6.6 earthquake 315 km northwest of this event struck San Fernando, California on February 9, 1971 (UTC), with estimated population exposures of 319,000 at intensity VIII and 21,000 at intensity IX or greater, resulting in a reported 65 fatalities.

Quakes past week

Over the last week, there have been four earthquakes of magnitude 2.5 or greater centered nearby. The largest, measuring 3.7, occurred close to Borrego Springs prior to this quake.

The four largest earthquakes nearby in the last week:

• 3.7, west of Borrego Springs on July 10
• 3.3, west-northwest of Calipatria on July 11
• 3.0, west-northwest of Calipatria on July 11
• 2.5, northwest of Progreso, B.C. on July 4

Source: The U.S. Geological Survey