A swarm of more than 1,000 earthquakes ripped through Yellowstone National Park in July, which officials are calling a 'doozy' of a month.
This was the most seismic activity in the region since the Maple Creek swarm of more than 1,100 quakes shook the park in June 2017.
Although some may fear this increase in activity may mean 'the big one [earthquake] is near,' the US Geological Survey (USGS) says the earthquakes were not caused by magma, but rather groundwater moving through pre-existing faults.
The University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, located 1,008 earthquakes in the park, with a whopping 764 beneath Yellowstone Lake.
The largest event was a 'quake with a 3.6 magnitude, located 11 miles below the lake's surface.
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A swarm of more than 1,000 earthquakes ripped through Yellowstone National Park in July, which officials are calling a 'doozy' of a month.
'While above average, this level of seismicity is not unprecedented, and it does not reflect magmatic activity,' the USGS wrote in its report.
'If magmatic activity were the cause of the quakes, we would expect to see other indicators, like changes in deformation style or thermal/gas emissions, but no such variations were detected.'
Yellowstone National Park sits in the northwest region of Wyoming and is home to bursting geysers, steam vents and bubbling pools.
At 3,472 square miles, the park is larger than the states of Rhode Island and Delaware combined.
Yellowstone National Park sits in the northwest region of Wyoming and is home to bursting geysers, steam vents and bubbling pools. At 3,472 square miles, the park is larger than the states of Rhode Island and Delaware combined
Most of the land is in Wyoming, but some of the park spills into Montana and Idaho.
Earthquakes that strike the park usually happen in swarms and are a result of volcanic fluids flowing along 'small fractures in the shallow rocks over the magma, a pattern that has been noted in volcanoes around the world,' according to the park.
However, some of the swarms are associated with water that lubricates the faults, causing them to shake, or tectonic forces that trigger numerous earthquakes at once – which is what occurred in July.
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