A massive 7.0 earthquake struck a remote stretch of the Alaska–Canada border on Saturday, shaking communities across Yukon and southeast Alaska but causing no major damage or tsunami threat so far.
Authorities in both countries report no casualties and only minor, non-structural impacts despite the quake being among the strongest recorded in northern Canada.
Quake overview and key facts
A powerful magnitude‑7.0 earthquake hit a sparsely populated wilderness area near the border between Alaska and Canada’s Yukon Territory late Saturday morning local time. The U.S. Geological Survey (USGS) and Earthquakes Canada located the epicenter roughly 56 miles (about 90 kilometers) north of Yakutat, Alaska, around 155 miles (250 kilometers) west of Whitehorse, Yukon, and approximately 230 miles (370 kilometers) northwest of Juneau, Alaska.
Initial readings placed the quake at a shallow depth of about 6–10 kilometers, a range typical of damaging crustal earthquakes, though the remote location helped limit its direct impact on people and infrastructure. The main shock occurred at about 11:41 a.m. local time in the border region, corresponding to roughly 12:41 p.m. Pacific time, and was quickly revised to magnitude 7.0 after early estimates around 6.7.
Key facts about the Alaska–Canada border earthquake
| Detail | Information |
| Magnitude | 7.0 (preliminary USGS and Earthquakes Canada estimate). |
| Date & local time | Saturday 6 December 2025, around 11:41 a.m. local time in the border region / 12:41 p.m. PST. |
| Epicenter location | About 56 miles (≈90 km) north of Yakutat, Alaska; ~155 miles (250 km) west of Whitehorse, Yukon; ~230 miles (370 km) northwest of Juneau, Alaska. |
| Depth | Roughly 6–10 km below the surface, classed as a shallow quake. |
| Nearest communities | Yakutat, Alaska (population about 660); Haines Junction, Yukon (about 1,000 residents). |
| Tsunami status | No tsunami warning or threat for Alaska, British Columbia, or the wider U.S. West Coast. |
| Damage and injuries | No casualties or major structural damage reported; residents mainly reported items falling from shelves and walls. |
| Aftershocks | Dozens of aftershocks registered, including at least one around magnitude 5.5–5.6 within minutes of the main quake. |
| Monitoring agencies | USGS, Earthquakes Canada, the National Tsunami Warning Center, and regional emergency offices in Alaska, Yukon, and British Columbia. |
Impact on communities and early assessments
Despite its strength, the earthquake struck beneath rugged mountains and glaciers in a region with very few permanent residents, sharply reducing the risk of casualties and wide-scale damage. Shaking, however, was felt over a broad area, including Yakutat and other parts of southeast Alaska, as well as Whitehorse and several Yukon communities hundreds of kilometers from the epicenter.
Police and emergency officials in Yakutat and Whitehorse reported no injuries or significant structural damage in the hours after the quake, while noting that residents clearly felt prolonged shaking. Social media posts and reports collected by USGS and Earthquakes Canada described light to moderate shaking, with people noting rattling windows, swaying buildings, and household items knocked from shelves.
Timeline of key events
| Time (local) | Event |
| 11:41 a.m. (border region) | Main magnitude‑7.0 earthquake strikes remote area near the Alaska–Yukon border. |
| Within ~5 minutes | A strong aftershock around magnitude 5.5–5.6 occurs close to the main epicenter. |
| Early afternoon | Shaking reported in Yakutat, Whitehorse, Haines Junction, and other Yukon communities; local police and emergency lines receive calls. |
| First few hours | More than 20–30 smaller aftershocks recorded along the border region; agencies confirm no tsunami threat and no immediate serious damage. |
| Later Saturday | Seismologists describe the event as one of the stronger quakes recorded in northern Canada, but emphasize that its remote location limited its impact. |
Officials in Yukon said the community closest to the epicenter on the Canadian side is Haines Junction, around 80 miles (130 kilometers) away, where no serious damage was initially reported. On the U.S. side, the nearest town is Yakutat, about 56 miles (91 kilometers) from the epicenter, whose small population and distance from major infrastructure helped minimize the risk of severe losses.
Seismic context and aftershock sequence
The earthquake struck in one of North America’s most active seismic zones, where the Pacific Plate grinds northwestward past the North American Plate along a major fault boundary. Much of this motion is accommodated on the Queen Charlotte–Fairweather fault system, a long strike‑slip fault off the Pacific coast that has produced numerous large earthquakes in Alaska and western Canada.
Seismologists noted that a magnitude 7.0 event in this region is significant even by Alaska–Yukon standards and ranks among the stronger quakes instrumentally recorded in Canada’s north. However, the combination of shallow depth, remote epicenter, and modern building standards in populated areas reduced the likelihood of catastrophic damage compared with similar‑sized quakes near large cities.
After the main shock, monitoring networks in Alaska, Yukon, and British Columbia detected a cluster of aftershocks spanning magnitudes roughly between 3 and 5.5. Agencies warned that additional moderate aftershocks are likely over the coming days, which could still dislodge loose rocks, trigger minor landslides, and rattle already‑stressed slopes in the surrounding mountains.
What comes next: monitoring and preparedness
USGS, Earthquakes Canada, and the National Tsunami Warning Center continue to review seismic data and update magnitude estimates, shake maps, and aftershock forecasts for the Alaska–Yukon border region. Authorities in Alaska, Yukon, and British Columbia have repeated that there is no tsunami threat from this event, while keeping emergency systems on alert in case later aftershocks affect communities more directly.
Emergency‑management agencies in both countries are using the quake as a reminder of standard earthquake safety steps: securing heavy furniture and water heaters, preparing emergency kits for at least 72 hours, and practicing protective actions during shaking. Safety guidance from USGS and federal and provincial agencies in Canada emphasizes that people who feel strong shaking should drop to the ground, take cover under sturdy furniture or near an interior wall, and hold on until the motion stops, while staying away from windows and heavy objects that might fall.
