An earthquake of magnitude 4.6 jolted the Bay Area early Thursday at 1:41 a.m., waking many residents from their sleep. The quake was centered near Boulder Creek in the Santa Cruz Mountains, according to the U.S. Geological Survey. People from Oakland to San Francisco felt the shaking, with reports of a strong jolt in some areas.
Nearby residents described experiences that ranged from anxious pets to a few broken dishes, with one home near the epicenter reporting a book tumbling off a shelf. Social media buzzed with comments and reactions from startled locals.
Residents received earthquake alerts, which are automatically sent for quakes of magnitude 4.5 and higher. In Boulder Creek, these alerts arrived only after the shaking began. Initially, the quake was thought to be a magnitude 5.1, but it was revised down to 4.6 shortly after.
The Santa Cruz area is known for its network of faults, and it’s still unclear which one caused this latest quake. Notably, it’s been decades since the region experienced the devastating 6.9 magnitude Loma Prieta earthquake in 1989.
While any quake could potentially lead to larger aftershocks, the chance of this specific quake being a precursor to something bigger is low—likely in the single digits. Experts note that the risk decreases over the week, especially if no significant aftershocks occur.
In comparison to the seismic activity in 1989, today’s building codes and emergency preparedness have improved significantly. Studies show that these advancements contribute to better safety and faster recovery after quakes.
For more on earthquake preparedness and safety tips, visit FEMA’s official page on earthquake readiness here.
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Bay Area, Earthquakes, California
