The preliminary magnitude 7.4 earthquake off the Alaska coast has triggered a tsunami warning in the immediate area, while other US and Canadian Pacific coasts are being monitored, the US Geological Survey said.
Many aftershocks followed with some measured at M5.8, M5.7 and M5.9.
The quake about 91 kilometers southeast of Sand Lake, Alaska was recorded at 1:54 p.m. local time. It was recorded as being 41 kilometers below the surface.
The blinking buoys are in tsunami mode:
Sand Lake is about 923 miles from Anchorage and 1,582 miles from Juneau. It is about 2,450 miles from Portland by land.
Tsunami sirens went off: