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Evacuation Of Smallest Canary Island Begins After Earthquake 'swarm' Sparks Fears Of Volcanic Eruption


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108 square mile island is home to 10,000 people

More than 8,000 tremors have been recorded on island in the last two months

Last eruption on El Hierro was in 1793 and lasted a month

Residents put on standby for emergency evacuation over fears of landslides

The last thing the Spanish economy needs right now?

The broken volcano fallacy?

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I hope this isn't the volcano in the Canaries that is liable to collapse sending a tsunami over the Atlantic resulting in a direct hit on New York :o

Apparently overstated.. nothing close to moving a continental plate several meters, so the tsunami will be local.

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Wrong again fluffy. It's not the plate movement that's the problem, it's the unstable mass which could landslip into the sea. Like the largest ever, in Alaska

Alaskan landslip causes tsunami

I have just returned from La Palma so read up about the issue.

Some of the facts in the Horizon program about the La Palma Tsunami were wrong and have been disputed by the Tsunami organisation. Still, its scary to think about.

This island gets exceedingly few tourists, its going to have little financial impact. In fact the prospect of large numbers of Volcano tourists is something the local look forward too, as my guide pointed out.

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Wrong again fluffy. It's not the plate movement that's the problem, it's the unstable mass which could landslip into the sea. Like the largest ever, in Alaska

Alaskan landslip causes tsunami

How does that make me wrong..?

To qualify:

A landslip in the Canaries could cause major LOCAL tsunamis, but would not be large enough to cause remote Tsunamis. The link you give illustrates this effect quite nicely, as it shows the rapid wave diminution over a few miles, even in a confined space.

There is more evaluation here:



Subsequent modeling by Mader (2001) confirms this and provides realistic estimates of tsunami far-field effects for the same hypothetical La Palma slide. Using the wave profile output obtained from a high speed (110 meters/second), pneumatic landslide generator of the Swiss Federal Institute of Technology at Zurich, Switzerland (Fritz, 2001), and based on a "worst case" scenario for La Palma (650 meter high, 20 kilometer radius water wave after 30 kilometers of travel), Mader's numerical model treats the resulting tsunami as an intermediate wave of short wavelength and period - taking into account both dispersion and geometric spreading effects. Specifically, the shorter period and wave amplitudes in his model, result in significant wave height attenuation with distance - to less than one-third of the shallow water amplitudes. The upper limit of his modeling study shows that the east coast of the U.S. and the Caribbean would receive waves less than 3 meters high. The European and African coasts would have waves less than 10 meters high. However, full Navier-Stokes modeling of the same La Palma failure, brings the maximum expected tsunami wave amplitude off the U.S. east coast to about one meter.


The gigantic Plinian and Ultra-Plinian volcanic eruptions of Krakatau in 1883 and of Santorin in 1490 B.C. involved large scale slope failures and generated catastrophic local mega-tsunamis, but the waves rapidly decayed as they traveled from the source. The maximum wave recorded in Batavia (presently known as Jakarta), from the Krakatau explosion/collapse was only 2.4 meters. The waves at Jaffa-Tel Aviv in the eastern Mediterranean from the explosion/collapse of Santorin were only 7 meters high.

So - in the absolute, not particularly realistic, worst case scenario, New York gets a 1m tsunami, and some bits of nearby Africa and Europe get locally significant waves. You want big waves, you need a plate boundary rupturing over several hundred kilometers.

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  • 1 month later...


The average price of property has fallen 20.5% in the Canary Islands since they reached their highest value, while during the month of October 2011, they dropped by 3.4% when compared the same month last year (2010). In the whole of Spain, the average price of housing fell by 6.9% in October compared to the same month in 2010 accumulating a fall of 23.7% since its peak in late 2007, according to data released by Tinsa on Tuesday (8th November 2011).
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