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But elsewhere, as here on La Palma, more violent eruptions build steep-sided cones with surrounding layers of thick ash.Įruptions in the past 60 years have jolted this island to the core, creating a fault line - a crack you can walk through - along the island central spine 6,000 feet above the Atlantic Ocean. In Hawaii lava gently pours from vents in the ground to build up almost horizontal layers of new rock. It's a newborn baby island, barely past its 4 millionth birthday, created in the last stage of what geologists call the rock cycle. This is the volcanic island of La Palma 700 miles off the northwest coast of Africa. Some eminent scientists warn that it's purely a matter of time till it happens. Man narrating: A slide from this mountain could kill millions of people in Europe and along America's eastern seaboard.
Because this scenario would be devastating to cities including New York, Boston, and Miami as well as coastal real estate in New Jersey, North and South Carolina, and Florida, it has been rigorously investigated by scientists. The flank has a volume of 1.5 trillion metric tons and models suggest that if it were to collapse it would generate a tsunami 1000 m high that would be 50 m when it arrived in Europe and along the eastern coast of the US. This has caused speculation that this flank could collapse. And more locally, tsunami deposits found in the Canary island suggest waves in the past over 150 meters high!Ĭumbre Vieja is the main volcano on the island of La Palma and has erupted recently causing large cracks to grow involving the significant motion of the western volcano flank. In fact, speculation is that giant blocks of limestone that weigh hundreds of tons meters above sea level in the Bahamas were delivered there by a megatsunami and the Canary Island landslides are a possible culprit. What makes this possibility super significant is the fact that this process could trigger massive tsunamis that could hit the coasts of Europe, the eastern seaboard of the US, and Antarctica. The coastlines of the Canaries are characterized by massive, steep cliffs and there has long been speculation that these features formed by dramatic collapse. These islands grew over a hotspot as in the Hawaiian islands and all but one has active volcanoes. The Canary Islands are a group of seven volcanic islands that lie 100 kilometers off the coast of Africa.
Canary Island Landslides and Potential Megatsunami
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