<
https://www.theguardian.com/environment/2024/sep/12/entire-earth-vibrated-climate-triggered-mega-tsunami>
"A landslide and mega-tsunami in Greenland in September 2023, triggered by the
climate crisis, caused the entire Earth to vibrate for nine days, a scientific
investigation has found.
The seismic event was detected by earthquake sensors around the world but was
so completely unprecedented that the researchers initially had no idea what had
caused it. Having now solved the mystery, the scientists said it showed how
global heating was already having planetary-scale impacts and that major
landslides were possible in places previously believed to be stable as
temperatures rapidly rose.
The collapse of a 1,200-metre-high mountain peak into the remote Dickson fjord
happened on 16 September 2023 after the melting glacier below was no longer
able to hold up the rock face. It triggered an initial wave 200 metres high and
the subsequent sloshing of water back and forth in the twisty fjord sent
seismic waves through the planet for more than a week.
The landslide and mega-tsunami were the first recorded in eastern Greenland.
Arctic regions are being affected by the most rapid global heating, and similar
though seismically smaller events have been seen in western Greenland, Alaska,
Canada, Norway and Chile.
Dr Kristian Svennevig from the Geological Survey of Denmark and Greenland, the
lead author of the report, said: “When we set out on this scientific adventure,
everybody was puzzled and no one had the faintest idea what caused this signal.
It was far longer and simpler than earthquake signals, which usually last
minutes or hours, and was labelled as a USO – an unidentified seismic object.
“It was also an extraordinary event because it is the first giant landslide and
tsunami we have recorded in east Greenland at all. It definitely shows east
Greenland is coming online when it comes to landslides. The waves destroyed an
uninhabited Inuit site at sea level that was at least 200 years old, indicating
nothing like this had happened for at least two centuries."
Via Susan ****
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
