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A long-dormant underwater volcano near Antarctica has woken up, triggering a swarm of 85,000 earthquakes.
The swarm, which began in August 2020 and subsided by November of that year, is the strongest earthquake activity ever recorded in the region. And the quakes were likely caused by a "finger" of hot magma poking into the crust, new research finds.
"There have been similar intrusions in other places on Earth, but this is the first time we have observed it there," study co-author Simone Cesca, a seismologist at the GFZ German Research Centre for Geosciences in Potsdam, told Live Science. "Normally, these processes occur over geologic time scales," as opposed to over the course of a human life span, Cesca said. "So in a way, we are lucky to see this."
The two largest earthquakes in the series were a magnitude 5.9 quake in October 2020 and a magnitude 6.0 quake in November. After the November quake, seismic activity waned. The quakes seemed to move the ground on King George Island around 4.3 inches (11 centimeters), the study found. Only 4% of that displacement could be directly explained by the earthquake; the scientists suspect the movement of magma into the crust largely accounts for the dramatic shifting of the ground.
What would happen if a super volcano erupted in Antarctica?
It would melt. And if all of Antarctica's ice melted,it would raise the global sea level by about 60 m (200 ft). Rising sea levels could contribute to major storms moving slower and dropping more rain. Hurricanes and typhoons would wreak havoc on the Earth's surface.
originally posted by: Spacespider
Sounds like Gaia have enough of us humans
whatifshow.com...
What would happen if a super volcano erupted in Antarctica?
It would melt. And if all of Antarctica's ice melted,it would raise the global sea level by about 60 m (200 ft). Rising sea levels could contribute to major storms moving slower and dropping more rain. Hurricanes and typhoons would wreak havoc on the Earth's surface.
Here are some interesting stuff from 2017
www.foxnews.com...
A new NASA study is adding evidence to a theory that there is an enormous geothermal heat source sitting beneath the ice.
It’s called a mantle plume. It’s positioned beneath a region named Marie Byrd Land. It potentially explains a lot.
On the surface, Antarctica has a pulse. It’s ice sheet slowly rises and falls, as though it is inhaling and exhaling.
This can be by as much as 6m at a time.