Meanwhile, the American Geological Survey (USGS) reported that 91 quakes were recorded in just one day in the Yellowstone National Park area.
These occurred southwest of Yellowstone Lake, between Lake Heart and West Thumb.
It is a very active region and there are frequent series of earthquakes, this time scientists report that there were many more of them than usual.
At the same time, they emphasize that despite the fact that the region is becoming more and more active, to their knowledge, nothing indicates an imminent eruption of one of the world's largest volcanoes.
In 2017, there were as many as 2,500 tremors in 3 months, the strongest with a magnitude of 4.4.
The most recent series of 91 quakes is unique, but still within the norm, as the strongest quake was only 2.8 in magnitude. Scientists are now conducting new studies of the volcano across Yellowstone Park.
Heavy trucks are used in the tests.
As they move, they generate low frequency waves.
They help seismologists in creating images of the top of the Yellowstone magma chamber, thanks to which we can monitor the condition of the supervolcano on an ongoing basis. Experts are sure that the title of Yellowstone is safe for humanity.
The last major eruptions occurred 640,000, 1.3 million and 2.1 million years ago, so the closest may be tens of thousands of years from now.
However, if it happened now, a cataclysm of an unimaginable scale would affect not only the people of the United States, but also the entire world.