A magnitude‑4.0 earthquake rattled Lake County early Wednesday, shaking the area around Lake Pillsbury but causing no reported injuries.
Key points
- The earthquake struck just after 5 a.m. on Wednesday and was upgraded to magnitude 4.0 by the USGS.
- Its epicenter was about six miles north of Lake Pillsbury, at a depth of roughly 6.5 miles.
- No injuries were reported, and the chance of a comparable aftershock within a week is estimated at 2%.
The U.S. Geological Survey recorded a magnitude‑4.0 earthquake in Lake County just after 5 a.m. on Wednesday, upgrading the event from an initial 3.9 reading.
The quake’s epicenter was located just over six miles north of Lake Pillsbury, with a focal depth of slightly more than 6.5 miles beneath the surface.
Timing and magnitude
Local authorities confirmed that no injuries have been reported in connection with the tremor, and there were no immediate reports of property damage.
USGS officials noted a two‑percent probability of an aftershock of magnitude 4.0 or greater occurring in the area within the next week, a relatively low likelihood but one that warrants continued monitoring.
Location and depth
The agency continues to track seismic activity in the region, and updates will be provided if additional tremors are detected.
Reader questions
When did the Lake County earthquake occur?
The quake struck just after 5 a.m. on Wednesday morning, according to USGS data.
Is there a risk of aftershocks?
USGS estimates a two‑percent chance of an aftershock of magnitude 4.0 or higher within the next week.
Source: sfgate.com
