
Magnitude 4.6 Santa Cruz Earthquake Shakes Bay Area, No Major Damage
Key Takeaways
- Magnitude 4.6 earthquake centered near Boulder Creek in Santa Cruz Mountains.
- Shaking felt across Bay Area; no major damage reported.
- Aftershocks expected in coming days, per USGS.
Earthquake Details
A magnitude 4.6 earthquake struck the Santa Cruz Mountains near Boulder Creek at 1:41 a.m.
The USGS initially reported it as a 4.9 before downgrading.

Nearly 32,000 people reported feeling the tremor.
Items were knocked off shelves at a Boulder Creek pharmacy.
There were no reports of serious damage or injuries.
USGS and Emergency Response
ShakeAlert early warning alarms were triggered at least 15 seconds ahead of strong shaking.
Cal Fire enacted procedures and conducted inspections, reporting no damage.

The quake was strong enough to break dishes and fall items off shelves.
Community Impact and History
Residents described being jolted awake and feeling their homes shake.
The quake struck near the site of the 1989 Loma Prieta earthquake.
The area has experienced earthquake swarms for decades.
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