The inactive supervolcano of California has 240 cubic miles of semifused magma

Californian Long Valley Caldera, in the image above, has 240 cubic miles of magma below the surface, according to a new scientific report

While Long Valley Caldera in California may look like a huge, exuberant canyon, what lies beneath has shocked scientists.

Under the 20-mile-long, 11-mile-wide crater land lies a whopping 240 cubic miles of semi-molten magma, a new report suggests.

The long inactive volcano was the site of a large explosion 767,000 years ago releasing 140 miles of volcanic material into the atmosphere and devastating the earth.

What he left was the 3,000-foot deep depression, called caldera, in central California that still has the potential to explode again.

Californian Long Valley Caldera, in the image above, has 240 cubic miles of magma below the surface, according to a new scientific report

Californian Long Valley Caldera, in the image above, has 240 cubic miles of magma below the surface, according to a new scientific report

The finding is part of a new report from the United States Geological Survey, but they say another explosion is unlikely in the short term.

The finding is part of a new report from the United States Geological Survey, but they say another explosion is unlikely in the short term.

The finding is part of a new report from the United States Geological Survey, but they say another explosion is unlikely in the short term.

Scientists say there are 240 cubic miles of semi-molten magma capable of leading to another epic explosion like the one that took place 767,000 years ago.

Scientists say there are 240 cubic miles of semi-molten magma capable of leading to another epic explosion like the one that took place 767,000 years ago.

Scientists say there are 240 cubic miles of semi-molten magma capable of leading to another epic explosion like the one that took place 767,000 years ago.

The amazing discovery of magma means that if another eruption occurs, which experts say is unlikely soon, it would cause a massive natural disaster.

It would overshadow the 1980 explosion of Mount Saint Helens that belched just 0.29 cubic miles of volcanic material into the atmosphere.

In fact, the valley's storage of 240 cubic miles of magma is enough to fill 400 million Olympic swimming pools.

"We can conclude that the mid-crustal deposit is still rich in melt, and we estimate that the reservoir contains enough melt to support another super eruption comparable in size to the 767 ka caldera-forming eruption," a report written by Geological Survey scientists. of the United States (USGS), the University of California and the University of Rhode Island said.

"This volume and a relatively high melting fraction in no way guarantee that the magma is eruptible," the report added.

The scientists came to their conclusion by inspecting the volcano using cutting-edge techniques.

They realized that the magma may be cooking under the boiler after four strong earthquakes shook the valley area in 1980 and gave rise to evidence of renewed volcanic disturbances in the region.

Then they discovered that the central part of the boiler was rising slowly.

"Because terrain deformation and earthquakes are common precursors to volcanic eruptions, the USGS has continued to closely monitor the disturbances in this region," the USGS said in a fact sheet.

Magma is found beneath the crater between Crowley Lake and Mammoth Mountain

Magma is found beneath the crater between Crowley Lake and Mammoth Mountain

Magma is found beneath the crater between Crowley Lake and Mammoth Mountain

The super explosion that took place 767,000 years ago threw volcanic material and ash that spread to Nebraska, Kansas and New Mexico.

The super explosion that took place 767,000 years ago threw volcanic material and ash that spread to Nebraska, Kansas and New Mexico.

The super explosion that took place 767,000 years ago threw volcanic material and ash that spread to Nebraska, Kansas and New Mexico.

The explosion of the prehistoric supervolcano led to the boiler 20 miles long and 11 miles wide, shown in pink, which still has magma moving underneath.

The explosion of the prehistoric supervolcano led to the boiler 20 miles long and 11 miles wide, shown in pink, which still has magma moving underneath.

The explosion of the prehistoric supervolcano led to the boiler 20 miles long and 11 miles wide, shown in pink, which still has magma moving underneath.

"However, the long history of volcanic activity in the Long Valley area indicates that future eruptions will occur," he added.

"Despite 40 years of diverse research, the presence of large volumes of melting in the Long Valley magma deposit remains unresolved," said report authors Ashton F Flinders, David R Shelly, Philip B Dawson, David P Hill , Barbara Tripoli and Yang Shen. .

California residents do not have to worry too much, since geological phenomena take years and many human lives take place.

After the supervolcano erupted 767,000 years ago, smaller groups of eruptions have followed approximately every 200,000 years.

About 100,000 years ago, an eruption formed Mammoth Knolls, low hills located north of Mammoth Lakes.

Mammoth Mountain, a popular trekking spot, is a young volcano located on the edge of the Long Valley Caldera.

"When an eruption occurs in the Long Valley area, its impact will depend on the location, size and type of eruption, as well as wind direction," the USGS said.

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