Memo to Oregon & Washington re Tsunami: Get Ready

It Can’t Will Happen Here

At 9PM on January 26, 1700 one of the world’s largest earthquakes occurred along the west coast of North America. The undersea Cascadia thrust fault ruptured along a 1000 km length, from mid Vancouver Island to northern California in a great earthquake, producing tremendous shaking and a huge tsunami that swept across the Pacific. The Cascadia fault is the boundary between two of the Earth’s tectonic plates: the smaller offshore Juan de Fuca plate that is sliding under the much larger North American plate.

The M9 Cascadia Megathrust Earthquake of January 26, 1700

map from USGS, here: Cascadia Subduction Zone

Three hundred and ten years ago, huh? And when can we expect the next one?

The average time between magnitude 8 and larger Cascadia earthquakes is about 240 years

A Postcard to the Pacific Northwest: Prepare –

Thanks to Revkin for reminding me of this.

Not exactly comforting, is it? Especially given the motto of the GOP, Be Unprepared.

Who could imagine
That they would freak out in Washington, D.C.
D.C. D.C. D.C. D.C. D.C.
It can’t happen here
Ba ba ba ba ba ba ba ba
It can’t happen here
It can’t happen here
Everybody’s safe and it can’t happen here.

–Frank Zappa

This entry was posted in American History, Disasters, Earth Science, History, Oceanography, Science, Uncategorized and tagged , , , , , . Bookmark the permalink.

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