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originally posted by: Violater1
This is the island, that if the Earthquake or volcanic eruption is strong enough, the Western part of the island can slide into the Atlantic and send a tidal wave thousands of feet high to the U.S. East Coast!
This suggests that the landslide on the La Palma Island is unlikely to cause severe tsunami impact on the U.S. East Coast, especially in areas facing a wide continental shelf.
This study investigates the possible effect on the U.S. Atlantic coast of a tsunami generated by the hypothetical collapse of the Cumbre Vieja volcano located on the Isla La Palma in the Canary Islands. Well-publicized studies of this scenario conducted by Ward and Day (2001) and Løvholt et al. (2008) suggest that the impact may be severe. Subsequent to the initial publication, more credible worst-case scenarios have been modeled to study wave evolution in the impact zone, open ocean, and continental shelf. However, these more recent studies lack an inundation model, and use a crude Green’s law scaling assumption to estimate wave heights at the beach. In this study, an Eulerian-Lagrangian hydrocode is used to simulate the landslide impact, a numerically dispersive linear shallow-water model (MOST) for open-ocean propagation, and a nonlinear inundation model to quantify impact at the coast. These more robust approaches provide a better estimate of the potential hazard on the U.S. coastline posed by the Cumbra Vieja volcano.
The amplitude at this location reaches approximately 1 to 2 m right at the coast, but the maximum over the entire model run (3.15 m) occurs in an isolated region just south of the channel entrance right at the shoreline. The only discernible inundation is expected to occur at this beach area, and is predicted to be nearly negligible (Figure 4.23), though damage to harbors in the Intracoastal Waterway due to high currents cannot be ruled out because wave amplitudes of nearly a meter are seen in the harbor areas.
originally posted by: Vasa Croe
How often does this volcano erupt?
originally posted by: infolurker
originally posted by: Violater1
This is the island, that if the Earthquake or volcanic eruption is strong enough, the Western part of the island can slide into the Atlantic and send a tidal wave thousands of feet high to the U.S. East Coast!
Yes, that could be problematic. Here is the summary from a few years ago.
originally posted by: tjack
It's raining down lava and piling up a mound of cinders fast!
originally posted by: Daughter2
a reply to: Vasa Croe
1677-1678 AD, 1585, 1646, 1712, 1949, and 1971