Tag Archives: warning

Shaking in Chignik

The 8.2 magnitude earthquake and the 140 aftershocks

At around 10:30 on Wednesday night, the alarm bells went off, and people across Alaska’s southern coast made a bee-line for higher ground. An 8.2 magnitude earthquake struck the interface between the subducting Pacific and overriding North American plates. This interface is known as the Aleutian Megathrust,and it is a very active seismic region. In fact, a 7.6 magnitude earthquake hit the area almost a year ago exactly.

Wave action

A tsunami warning was immediately issued for coastal communities, but luckily incoming waves never reached heights over a 1/4 meter, and the warning was lifted a little over two hours later.

This was the first 8.0+ earthquake to hit the United States in 50 years. In the 12 hours after the initial quake, the area received 140 aftershocks, with the largest being a 6.1. In 1938, the same area experienced an 8.3 magnitude shaker.

NWS Priority Warnings Chart

Interestingly, Tsunami Warning is Priority #1 on the National Weather Service priority list. One would hope that Nuclear Power Plant Meltdown is higher on a different agency’s list.


An actual thunderstorm

Image from the National Weather Service – Fairbanks

An honest to goodness thunderstorm is rather rare in Alaska. We get lightning by the bolt load, but nothing like a midwestern U.S. hill shaker. We just do not have the humidity to drive impressive, tornado birthing, cells. Still, what developed just across the northern bank of the Yukon River near Beaver, AK actually brought out the official Severe Thunderstorm Warning call from the Fairbanks office of the National Weather Service on Wednesday evening.

It was noted that it has been over two years since the NWS from Anchorage or Juneau has issued such a warning. Who knew such competition existed within the NWS?

Definitely not a normal occurrence.

On another note: Last night was the final night of the year for a post midnight sunset in Fairbanks. Summer is going by so fast.


Beer Attractant


Courtesy of The Curator