Eureka, California – Coastal communities in Northern California are experiencing rising tsunami activity Tuesday morning following a massive 8.8-magnitude earthquake, with Crescent City already recording a wave height of 3.6 feet—enough to trigger minor coastal flooding and strong currents.
According to the National Weather Service in Eureka, confirmed tsunami surges also include 3.0 feet at Arena Cove and 1.2 feet at Humboldt Bay. The tsunami activity coincides with a 4 a.m. high tide, amplifying the potential for inundation in low-lying coastal areas. NOAA tide gauges at Crescent City, North Spit, and Arena Cove show pronounced wave spikes beginning just before 7:30 a.m. GMT (12:30 a.m. PT), with residuals sharply diverging from predicted tide levels.
Local emergency officials urge residents and visitors to avoid beaches, harbors, and low-lying shorelines due to dangerous, erratic currents continuing through the morning. Ports and marinas may experience turbulence and temporary closures.
While no widespread damage has been reported, officials are monitoring conditions closely. The combination of strong surges and tidal alignment poses ongoing risk through at least midday Tuesday.
Warnings remain in effect along the Northern California coast, and additional advisories may be issued as seismic sea activity continues.
