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La Palma Mega Tsunami

0:07

Someday again, like it did 500,000 years ago, a large piece of La Palma will break away.

0:16

What might be expected at distant shores?

0:57

Let's compute tsunami for a 500 cubic km collapse. If the collapse is smaller, scale the following heights proportionately.

1:06

These maps show maximum expected runup as if there was land at each location.

1:16

Real wave heights in deep water are much smaller.

1:23

The runup scale is 10-20m, 20-30m, 30-40m .... up to 100m.

1:29

France and United Kingdom: 10s and 20s

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Bermuda and Puerto Rico: Mid 40s

2:38

The movie clearly portrays the principal aspects of the tsunami.

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3. Non-uniform radiation. Strongest waves leave

3:18

A La Palma tsunami has consequences similar to Japan's 2011 wave, but it would affect 100 times more coastline.

3:25

and with the odds of a collapse at just a few percent each century...

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