2024-09-13 12:26:59
A year ago, a large earthquake caused by global warming in a fjord to the east of the island caused another wave, then shook the ground for nine days.
An earthquake dragging a piece of glacier into the depths of the Greenlandic fjord, a megatsunami followed by an earthquake causing the whole world to shake for more than a week: this is the scene of an incredible disaster in the cascade of the world group said researchers. in the magazine Knowledge Thursday.
The story begins in September 2023, when a mysterious seismic signal was seen around the world for nine days. Beyond the unusual duration, its appearance disconcerts seismologists: oscillating very slowly, very regularly, this signal has only one vibration frequency and in a way that is not like those of earthquakes. However, it is strong, equal to what a magnitude 5 earthquake would produce.. « We have never seen this before »recalls Anne Mangeney, professor at Paris-Cité University (Paris Institute of Globe Physics) and co-author of the study.
Signal source…
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