The U.S. Geological Survey reported an earthquake during the coronavirus pandemic when a preliminary magnitude 3.1 quake rattled near Corona on Tuesday night. A nearby magnitude 2.7 quake followed at the same time, leaving 363 people to submit felt reports through the USGS online form.
The 3.1 magnitude quake shook at 11:17 p.m. on Aug. 11 and was about 6 miles west-southwest of Corona, roughly 19.2 miles east-northeast of Riverside. The earthquake had a depth of 2 miles, according to USGS information.
USGS Felt Report responses
Residents in Moreno Valley, Newport Beach, Riverside, Santa Ana and Mission Viejo reported experiencing the quake. Those responses came through the USGS Felt Report form and the USGS DYFI report, the public reporting tools used to register shaking by location and time.
The nearby magnitude 2.7 quake was reported 6.2 miles west-southwest of Corona at 11:17 p.m. on Aug. 11. Because both quakes were logged at the same minute and in nearly the same area, the record leaves the practical question of whether the smaller event was a follow-up tremor or a separate quake.
Corona in Orange County
For people in Orange County and nearby cities, the immediate takeaway is simple: the shaking reached multiple communities, but the public record here points to reports of weak shaking rather than any broader escalation. Anyone who felt the ground move and has not submitted a report can still use the USGS Felt Report and USGS DYFI tools to add a location-based account to the record.
The most useful next step is to treat the first minutes of any shaking report as the key window for documentation. The USGS record already shows where the quake was felt and how many people responded, and that is the clearest picture available from this event.
