- USGS Live Earthquake Map — real-time magnitude, depth, and aftershock tracking
- MyShake Early Warning App — California's free earthquake early-warning app
- Cal OES Earthquake Preparedness — official state guidance on what to do before, during, and after
A small earthquake rattled the Corona area Monday, and if you felt a rumble, you're not imagining things. Seismic activity was recorded near Corona on Aug. 11, with reports putting the magnitude between 2.7 and 3.1 depending on the agency, according to the Orange County Register and Sacramento Bee. No damage or injuries have been reported so far.
Related: MAGNITUDE 2.8 EARTHQUAKE STRIKES NEAR THE GEYSERS IN SONOMA COUNTY · M2.8 EARTHQUAKE STRIKES NEAR THE GEYSERS IN SONOMA COUNTY
The discrepancy in magnitude is normal — early readings get revised as seismologists crunch the data. What's clear is the quake was minor, but enough to get people reaching for their phones and searching for answers.
This is a developing story and details may change.
Did You Feel It?
Felt earthquakes in the 2.7–3.1 range are typically described as a brief jolt or shudder — rattling windows, swaying light fixtures, maybe a picture knocked crooked. Most people in the immediate area notice them; those farther out may not feel a thing. No structural damage is expected at this magnitude.
See also: M2.8 EARTHQUAKE STRIKES NEAR THE GEYSERS IN SONOMA COUNTY · MAGNITUDE 2.8 EARTHQUAKE STRIKES NEAR THE GEYSERS IN SONOMA COUNTY
What to Do After a Small Quake
Even after a minor shake, it's smart to check for gas leaks, inspect water lines, and make sure nothing heavy has shifted on shelves. California emergency officials always recommend keeping an emergency kit handy — small quakes can sometimes precede larger ones, though most don't. Stay tuned to local alerts and Cal OES for any updates.
Anything Else Shaking in California?
Separately, two earthquakes also struck Sonoma County on Tuesday, per Patch — though those appear unrelated to today's Corona activity. Seismic events across the state are common and are being monitored by the USGS and state agencies.