Geological Survey (USGS) after the scientific agency of the United States government reported that volcanic activity at Kilauea on Hawaii Island continues to worsen, with an ash cloud growing as high as 10,000 to 12,000 feet.
Generally speaking, volcanic ash can be toxic and quite harmful to human.
"We're observing more or less continuous emission of ash now with intermittent, more energetic ash bursts or plumes", Steve Brantley, a deputy scientist in charge at the Hawaiian Volcano Observatory (HVO), said.
Ashfall and unsafe volcanic smog, otherwise known as "vog", from the ash cloud were reported as far southwest as Pahala, a small community about 18 miles downwind of the crater.
Ash and fiery projectiles exploding from the Kilauea volcano have forced Hawaii authorities to issue an aviation red alert warning pilots to steer clear of the erupting shield crater. It's also wreaking havoc on Hawaii's famed tourism industry to an estimated tune of millions of dollars in the first week after the May 3 eruption.
Down Highway 11, the main artery connecting the east and west side of the Big Island, a string of cars sit near the entrance of Volcano National Park.
Dr. Nair says students will still be visiting Hawaii's active volcanoes, but they'll be studying the Kilauea from a distance.
People watch as ash erupts from the Halemaumau crater near the community of Volcano during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 15, 2018. Fissure 17, which had put out a flow more than a mile toward the ocean, has not advanced since Tuesday, they said.
The U.S. Geological Survey upgraded the aviation warning for Kilauea from orange to red Tuesday afternoon, saying ash from the Halemaumau crater had been rising almost continuously and in increased intensity.
The historic eruption lasted just over a month.