A preliminary magnitude 3.4 earthquake struck the Inland Empire around 8:17 p.m. This is the second earthquake to hit the area on Saturday.
The quake occurred about 6.9 miles northwest of Fontana, according to the U.S. Geological Survey.
As of 9 p.m., there were no reports of injuries or damage.
This is a developing story. Stay tuned to KTLA 5 News for the latest information.
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Thousands of earthquakes are recorded in California each year, but most are extremely small. According to the USGS, only a few hundred specimens reach magnitude 3.0 and only about 15 to 20 exceed magnitude 4.0.
In North America, only Alaska records more earthquakes per year than California.
What to do if an earthquake occurs
When an earthquake occurs, it is very important to know the proper steps to protect yourself and minimize injury. The California Department of Public Health (CDPH) provides detailed guidelines on what to do during such events. The key points are:
Drop, cover, and hold on:
Drop: Immediately drop to your hands and knees. This position prevents falls and allows you to stay low and crawl to safety if necessary.
Protect yourself: Use one arm to protect your head and neck and seek shelter under a sturdy table or desk if possible. If you don’t have a place to evacuate, get down next to an interior wall, away from windows. Get on your knees and lean forward to protect your vital organs.
Wait: Stay in your shelter until the shaking stops. If your shelter changes, be prepared to move with it.
