Bay Area M4.6 earthquake Santa Cruz Mountains Boulder Creek, high aftershock risks
Key Questions
Where and when did the recent M4.6 earthquake occur?
The M4.6 earthquake struck near Boulder Creek in the Santa Cruz Mountains at 1:41 a.m. on Thursday. It was initially reported as magnitude 5.0 but later downgraded.
How widely was the earthquake felt?
The quake caused strong shaking (intensity VI) and was felt widely across the Bay Area, from San Francisco to the East Bay, as well as the Central Coast. Reports confirm it woke residents in Santa Cruz Mountain communities and beyond.
Were there any reports of damage or injuries?
No damage, injuries, or aftershocks have been reported yet, according to USGS, CAL FIRE, NBC, KRON4, and experts. Infrastructure, transit, and safety are being monitored.
What is the risk of aftershocks after this earthquake?
There is a 76% chance of at least one M3+ aftershock in the next week. Forecasts from experts like those on NBC Bay Area note ongoing aftershock potential alongside weather changes.
Did early warning systems provide alerts for this quake?
ShakeAlert and the MyShake app warned hundreds of thousands of residents seconds before shaking. This highlights improvements, though gaps remain as noted in 1906 earthquake hypotheticals.
What preparations are recommended following this earthquake?
Residents should practice drop, cover, and hold on; prepare go-bags; and consider home retrofits. Upcoming free trainings, like at Berkeley Public Library this Saturday, offer emergency preparedness guidance.
How does this quake compare to historical events like 1906?
Unlike a hypothetical 1906 repeat, which would leave some cities without warning, MyShake provided seconds of notice here. It serves as a reminder of living in earthquake country.
What resources are available for more information on the quake?
Check USGS for updates, NBC Bay Area videos on shaking felt, and seismologist insights from Berkeley experts. MyShake app details and local news like KRON4 cover the event extensively.
M4.6 Apr14 1:41am near Boulder Creek felt SF-East Bay, strong VI shaking; ShakeAlert/MyShake early warning. Evac orders/shelters (Valley View HS/animals, monitor slides/Hwy17/aftershocks). No major damage/injuries, 76% M3+ aftershock chance next week; prep urged.