A powerful earthquake struck Northern California on Thursday, with the epicenter located just off the coast near Fortuna, according to the U.S. Geological Survey (USGS). Initially measured at a magnitude of 6.6, the quake was later upgraded to 7.0.
The National Oceanic and Atmospheric Administration (NOAA) issued a tsunami warning following the earthquake, spanning from Davenport, California, to the Douglas County/Lane County line in Oregon.
Notable quake, preliminary info: M 6.6 – 63 km WNW of Petrolia, CA https://t.co/ZEcQXAqpAk
— USGS Earthquakes (@USGS_Quakes) December 5, 2024
The warning affects over 5.3 million California residents, including those in the San Francisco Bay Area, as reported by ABC7.
Residents received emergency alerts on their phones, warning of the potential danger:
“A series of powerful waves and strong currents may impact coasts near you. You are in danger. Get away from coastal waters. Move to high ground or inland now. Keep away from the coast until local officials say it is safe to return.”
The warning underscores the risk of significant inundation from tsunami waves, which can pose a threat for hours after their initial arrival.
The San Francisco Bay Area, included in the warning zone, has experienced significant disruptions. The Bay Area Rapid Transit (BART) system is facing major delays, and the Transbay Tube, which runs underwater, has been closed to train service as a precaution.
Officials urge residents to avoid low-lying areas and coastal zones until further notice, as tsunami waves can vary in size and timing.
Several aftershocks have been recorded following the main earthquake. Notable among them was a 5.8-magnitude aftershock near Cobb, California, with additional tremors ranging from 2.5 to 4.2 in magnitude.
The National Weather Service (NWS) issued a reminder of the dangers associated with tsunamis:
“Tsunami warnings mean that a tsunami with significant inundation is possible or is already occurring. Tsunamis are a series of waves dangerous for many hours after the initial arrival time. The first wave may not be the largest.”
Local emergency services and disaster response teams are actively monitoring the situation and coordinating evacuation efforts where necessary. Coastal residents are advised to seek higher ground immediately and remain vigilant as conditions evolve.
Authorities emphasize that even if the initial wave seems small or inconsequential, subsequent waves can be much larger and more destructive.
This seismic event serves as a reminder of the importance of earthquake and tsunami preparedness in areas along the Pacific coast. Residents are encouraged to review evacuation routes, maintain emergency kits, and stay informed through official updates from local and state authorities.
As the region grapples with the aftermath of this significant quake, experts will continue to monitor seismic activity and provide updates on both the potential tsunami threat and the stability of affected areas.