Joseph Carey – Feb 20, 2018
The shock discovery was announced by the United States Geological Survey (USGS) that declared the quakes have been occurring “over the past several days”.
In a post, it wrote: “Over the past several days, an earthquake swarm has been ongoing at Yellowstone.
“Keep in mind that swarms like this account for more than 50 per cent of the seismic activity at Yellowstone and no volcanic activity has occurred from any past such events.
“As of the night of February 18, over 200 earthquakes have been located in an area ~13 km (8 miles) North East of West Yellowstone, Montana.
The USGS added that the seismic rates and the magnitude of the quakes have “increased markedly” and warned that the largest quake reached a magnitude of 2.9 on the Richter scale.