The mouth of the Stillaguamish River (named for the tribe) is about four miles from my house and this height gage is out far enough that the water level is strongly influenced by the tides. The tidal action here is squirrely enough that a computer model delivers a very fuzzy representation so an actual real-time gage is nice to have.
Anyway, reviewing the graph shows no visible sign of any tsunami or change in water height from this morning's quake off the Oregon coast. I looked for similar data for the Columbia river and that was not available - they do not have a gage close enough to the river's mouth to be tidally influenced.
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