Yellowstone volcano WARNING: Experts reveal ‘WEAK point’ that could SPARK eruption
“it is not actually in the caldera, yet has the highest temperature.
“It is possible there is some magma that has extended to the north beneath that region.”
Should the molten rock rise too high, it could cause the geyser to blow, forming an earthquake.
Dr Robert Smith, another researcher with USGS, believes an event like this in an unstable area would be enough to set off a chain reaction.
He said: “An earthquake here would form the heartbeat of the system.