San Francisco, CA — July 30, 2025: The National Weather Service (NWS) has officially canceled the tsunami advisory for the San Francisco Bay Area, signaling an end to immediate threats following a powerful undersea earthquake near the Aleutian Islands early Wednesday morning.
What prompted the tsunami advisory?
At approximately 3:18 a.m. PDT, a magnitude 7.8 earthquake struck off the southern coast of Alaska, activating tsunami warning systems across the Pacific. The initial tsunami advisory, issued by the National Tsunami Warning Center, covered much of the West Coast, including the Bay Area, prompting coastal communities to monitor for potential hazardous waves.
Current status for the Bay Area
As of 11:30 a.m. PDT, the NWS announced the cancellation of the tsunami advisory for all California coastal counties, stating that observed sea-level changes were minor and posed no ongoing danger to the public. The largest recorded wave heights in the Bay Area were under one foot, according to tide gauges at the Golden Gate and Alameda.
Is the tsunami threat over?
Experts confirm that no further tsunami activity is expected in the region. However, officials advise residents to remain cautious around beaches and harbor entrances, as strong currents may persist throughout the afternoon. The California Office of Emergency Services (Cal OES) recommends that boaters and swimmers continue to exercise caution until Thursday morning, when residual surges are expected to fully subside.
- No evacuation orders were issued in the Bay Area.
- No injuries or significant damage have been reported along California’s coast.
- Minor flooding was noted in some low-lying harbors in Northern California.
What to know moving forward
While the immediate tsunami threat has passed, officials emphasize the importance of preparedness and awareness. The U.S. Geological Survey and NWS continue to monitor seismic activity along the Pacific Rim. Residents can sign up for local emergency alerts and follow updates from official agencies for future advisories.
For more information, visit the National Tsunami Warning Center and the National Weather Service websites.
