We’d be talking instantaneous ice age.
Yellowstone is “under strain” according to a group of seismologists monitoring the volcano.
Seismologists from UNAVCO, a nonprofit university-governed consortium, are using “Global Positioning System, borehole tiltmeters, and borehole strainmeters” to measure minute changes in deformation at Yellowstone.
These strainmeters are extremely sensitive, so sensitive that they can record surface waves on Yellowstone Lake.
In an article for the Billings Gazette, David Mencin and Glen Mattioli, geodesists with UNAVCO, say “the strain signal is larger than would be expected if the crust under Yellowstone were completely solid”.
However, they add “these findings are no cause for alarm.”
A Yellowstone supervolcanic eruption “could could be a staggering 6,000 times as powerful as the one from Washington’s Mount St Helens in 1980,” says express.co.uk.
If such an eruption should occur, “a climate shift would ensue as the volcano would spew massive amounts of sulphur dioxide into the atmosphere, which can form a sulphur aerosol that reflects and absorbs sunlight.”