Yellowstone, Wyoming's well known national park, is among the largest supervolcano on the North American continent. As per the latest study, the chamber of magma is much larger as compared to what scientists have predicted earlier.

As per National Geographic, a team of researchers from the University of Utah in Salt Lake City have discovered that the chamber of lava consist of about 200 to 600 cubic kilometers (47 cubic miles to 145 cubic miles) of molten rock.

The width of the chamber is 18 miles and its depth is about three to nine miles below the surface of earth.

The figure is nearly 2.5 times larger as compared previous estimates.

Professor Bob Smith, from the University of Utah, says, "We've been working there for a long time, and we've always thought it would be bigger. but this finding is astounding".

Earthquake measurement data was studied by Smith and the team. This data was gathered from approximately 40 seismometers in the region of Yellowstone between 1984 and 2011.

As per the U. S. Geological Survey, there have been three major eruption of the Yellowstone supervolcano in the last few million years. The first eruption occurred about 2.1 million years back. The second erupted nearly 1.3 million years back. The last eruption occurred about 640,000 years back. As per scientists, they are due for another.