January 23 2018

A large earthquake about 175 miles southeast of Kodiak Alaska struck early this morning, 1:31 AM PST (4:31 AM EST). It was downgraded from initial reports to a 7.9 Magnitude. It was relatively shallow at 15 miles depth, which triggered a Tsunami Warning for Alaska and Canada to the Washington State Coast, and a Tsunami Watch for the west coast of the US down through central California. A tsunami wave was detected, but appears to be smaller than what was feared. The latest info below…

Note: Multiple aftershocks over 5.0 M have already been detected. This is normal for a quake of this size, and can last for a few days.

OBSERVATIONS OF TSUNAMI ACTIVITY – UPDATED

——————————————

* Observed max tsunami height is the highest recorded water level

above the tide level up to the time of this message.

TIME OBSERVED MAX

SITE OF MEASUREMENT TSUNAMI HEIGHT

—————————- —————- ————–

Kodiak Alaska 0329 PST Jan 23 0.6ft

Seward Alaska 0331 PST Jan 23 0.4ft

Old Harbor Alaska 0338 PST Jan 23 0.7ft

Sitka Alaska 0318 PST Jan 23 0.4ft

Yakutat Alaska 0335 PST Jan 23 0.5ft

Langara BC 0330 PST Jan 23 0.4ft

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