Good point.  Tsunami.  I believe I read something recently about the Canary Island (volcano eruption) collapsing its unstable western side.  If it is a sudden collapse, the tsunami to the East Coast of the USA would be devastating. https://rense.com/general13/tidal.htm ...Travelling at speeds of up to 500mph, the tsunami would be an unstoppable force.... ....But the built up coastal areas of Florida, Brazil and the Caribbean were expected to suffer the greatest destruction, according to a n  c66  ew forecast by Dr Simon Day, of the Benfield Greig Hazard Research Centre at University College London. Here, the wave would reach heights of 130ft to 164ft - higher than Nelson's column - and travel four or five miles inland flattening everything in its path..... Computer Model: https://www.youtube.com/watch?v=Zb4T8a1K5tw After a year that has seen concern about potential voicano eruptions in Iceland, Italy and Bali, volcanologists on the Canary Islands have been asked to work out whether the island of La Palma is facing an imminent eruption. The experts have been asked to monitor activity on the island, which saw 400 tremors in 15 hours over the weekend.... https://www.independent.co.uk/travel/news-and-advice/canary-islands-volcano-eruption-tsunami-warning-cumbre-vieja-tenerife-a8018776.html