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The National Geographic Institute (IGN) and Volcanological Institute of the Canary Islands is continuing to record scores of earthquakes, measuring between 1 and 3 on the Richter Scale, each day. The majority of earthquakes are being recorded at a depth of between 5km and 15 km.
In a BBC Horizon program broadcast on 12 Oct 2000, geologists hypothesised that a during a future eruption a similar landslide could potentially generate a “megatsunami” some 2000-3000 ft (650–900 m) high in the region of the islands. The huge wave would radiate out across the Atlantic and inundate the eastern seaboard of North America including the American, Caribbean and northern coasts of South America a mere six to eight hours later.
According to modeling estimates, the tsunami’s waves could possibly reach 160 ft (49 m) or more high and, depending on topography, could extend up to 16 miles (25 km) inland, causing massive devastation along the coastlines.
The volcanic activity, principally at the convergence of the three ridges, resulted in the continual expansion of the island. A mere 50,000 years ago, as a result of seismic tremors which produced massive landslides, a giant piece of the island cracked off, crashed down into the ocean and scattered along the seabed.
Originally posted by BrianC
Nuke the island?
Originally posted by BrianC
Nuke the island?
That is very concerning. I saw that show about mega tusnamis and how if there were a landslide on that island it would devastate the U.S. east coast.
Whether or not Cumbre Vieja will indeed one day collapse into the Atlantic and generate a mega-tsunami remains a point of heated argument between geologists. The recent spate of earthquakes in the Canary Islands have largely affected tiny El Hierro, and while the number recorded there is considered ‘unprecedented,’ nobody is suggesting the temblors are leading up to something larger. As with so many issues surrounding seismology and volcanology, more research and analysis is required.
According to geologist Bill McGuire, a Benfield professor of geophysical hazards at University of College of London, it is only a matter of time before Cumbre Vieja erupts and sheds a good portion of it and its surrounding territory into the Atlantic deep. That we’re talking about a slab of mantle the size of a small island means the resulting displacement of water could send a wall of water hundreds of feet tall crashing across the Canary Islands and similar devastation to the nearby African coast. The Americas and portions of Europe would have to wait several hours for the resulting mega-tsunamis to strike them.
“Eventually the whole rock will collapse into the water and the collapse will devastate the Atlantic margin,” says McGuire. “We need to be out there looking at when an eruption is likely to happen, otherwise there will be no time to evacuate major cities.” Such a global geophysical event or “gee gee” as some have come to call them, represents a magnitude of disaster unknown to modern humans.
There are more than a few scientists who vehemently disagree with McGuire’s assessment, arguing that Cumbre Vieja’s host island of La Palma is quite stable and is home to a number of natural obstacles that would impede if not entirely stop any massive landslide from occurring. Furthermore, they have created computer models of their own that don’t jibe with the doomsday scenarios put forth by McGuire and his compatriots. The volcano would need to be appreciably taller, they argue, and even then the forces at work could not create the energies described by McGuire.
McGuire and a group of like-minded geologists... urge nations situated along the Atlantic to actively monitor the Canary Islands, because such surveillance could provide days of warning (versus just the hours that our existing Atlantic-based buoy system would deliver).
The theory is far from being accepted.
Originally posted by Phage
reply to post by Arken
It is being monitored. There is no indication of an eruption.
earthquake-report.com...
But the earthquakes are occurring at a different volcano than the one McQuire thinks can cause a megatsunami. A volcano 50 miles away from the one McQuire thinks can cause a megatsunami.
edit on 8/3/2011 by Phage because: (no reason given)
Originally posted by Phage
reply to post by Arken
Why?
Does McQuire think that El Hierro can produce a megatsunami? Does any geologist?
I know you do but you see disasters behind every corner.
edit on 8/3/2011 by Phage because: (no reason given)