2.9 magnitude earthquake strikes in Sacramento County where 4.2 hit last week, USGS says

SACRAMENTO COUNTY, Calif. (KGO) -- A 2.9 magnitude struck near Isleton, California in Sacramento County Monday morning, according to the U.S. Geological Survey, less than a week after a 4.2 quake hit the same area.

The quake hit at around 7:42 a.m. It had a depth of 8 km, the USGS said.

It was originally reported as a 4.0 but then downgraded to 2.9.

There is no word of any injuries or damage.

The quake that struck Isleton last week set off a ShakeAlert to Northern Californians because it was initially estimated as above a 5.0, but then later downgraded minutes later.

MORE: Bay Area expert explains why ShakeAlert overestimated 4.2 magnitude NorCal earthquake

Last week's earthquake came a day before the Annual Great ShakeOut, where emergency systems will be tested for earthquake preparedness.

Click here for the latest stories and videos about earthquakes here in the Bay Area and around the world, and click here for more information on disaster preparedness.

RELATED STORIES & VIDEOS:

• Prepare NorCal: Disaster Preparedness Resources
• Earthquake scale: How they are measured and what the magnitude and intensity scales mean
• How to prepare your pets in case of disaster
• What is an earthquake? This is what happens when the ground starts to shake
• California's Shake Alert earthquake warning system tested in Oakland
• New earthquake map app reveals risk where you live
• Seismologists say California is in an earthquake drought
• Ceremonies mark 113th anniversary of 1906 earthquake in SF
• From the Archives: ABC7's Peabody Award winning coverage of 1989 Loma Prieta Earthquake
• San Francisco mayor issues executive directive to make sure all skyscrapers are safe
• Earthquake early warning app for Los Angeles County now available for download
• San Mateo County residents will soon be automatically signed up to receive emergency alerts
• ABC7's Leslie Brinkley remembers driving across the Bay Bridge during Loma Prieta earthquake
• Is San Francisco ready for the next big disaster, earthquake?

If you're on the ABC7 News app, click here to watch live