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Bay Area Rattled by Magnitude 3.8 Earthquake Near San Leandro, BART Trains Slowed
The quake prompted brief BART speed reductions and delays of about 20 minutes as USGS revised the initial magnitude down from 4.1.
- On Thursday, August 13, 2026, a magnitude 3.8 earthquake struck the East Bay at 8:30 a.m. near the Oakland Zoo, initially reported as 4.1 before the United States Geological Survey downgraded it.
- Research geophysicist Sarah Minson with the USGS confirmed the quake occurred on the Hayward Fault, describing it as a fairly small event unrelated to a swarm of earthquakes near San Ramon earlier this year.
- Residents reported feeling the shaking from Santa Rosa to Santa Cruz and as far east as Tracy. Bay Area Rapid Transit announced systemwide delays of about 20 minutes Thursday morning for safety inspections, with service resuming afterward.
- The Hayward Fault remains one of the region's most dangerous, with the USGS estimating a 72% probability of a magnitude 6.7 or larger earthquake within the San Francisco Bay Area in the next 30 years.
- A USGS simulation warns that a future magnitude 7 earthquake on the Hayward Fault could result in at least 800 deaths and 18,000 injuries, reflecting the significant seismic risk the region continues to face.
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Coverage Details
Total News Sources27
Leaning Left7Leaning Right2Center9Last UpdatedBias Distribution50% Center
Bias Distribution
- 50% of the sources are Center
50% Center
L 39%
C 50%
11%
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