NS Slug: JAPAN: MOUNT ASO ERUPTS (AERIALS)  Synopsis: Japan's Mount Aso erupts.  Video Shows: Eruption of Mount Aso in Japan (Aerials)    Keywords: JAPAN VOLCANO ERUPTS ERUPTION
TV ASAHI
NS Slug: JAPAN: MOUNT ASO ERUPTS (AERIALS) Synopsis: Japan's Mount Aso erupts. Video Shows: Eruption of Mount Aso in Japan (Aerials) Keywords: JAPAN VOLCANO ERUPTS ERUPTION
Now playing
00:59
Japanese volcano Mount Aso erupts
Now playing
01:32
See two months' worth of volcano damage in Hawaii
Volcan de Fuego, or Volcano of Fire, blows outs a thick cloud of ash, as seen from Alotenango, Guatemala, Sunday, June 3, 2018. One of Central America's most active volcanos erupted in fiery explosions of ash and molten rock Sunday, killing people and injuring many others while a towering cloud of smoke blanketed nearby villages in heavy ash. (AP Photo/Santiago Billy)
Santiago Billy/AP
Volcan de Fuego, or Volcano of Fire, blows outs a thick cloud of ash, as seen from Alotenango, Guatemala, Sunday, June 3, 2018. One of Central America's most active volcanos erupted in fiery explosions of ash and molten rock Sunday, killing people and injuring many others while a towering cloud of smoke blanketed nearby villages in heavy ash. (AP Photo/Santiago Billy)
Now playing
01:44
Guatemala volcano eruption leaves dozens dead
Smoke fills the air as the Fuego volcano erupts in Guatemala on June 3, 2018.
ORLANDO ESTRADA/AFP/AFP/Getty Images
Smoke fills the air as the Fuego volcano erupts in Guatemala on June 3, 2018.
Now playing
02:04
Dozens dead after Guatemala volcano erupts
guatemala volcan de fuego minutos terror orig huston_00005121.jpg
Video aficionado
guatemala volcan de fuego minutos terror orig huston_00005121.jpg
Now playing
03:59
Giant cloud of ash, lava and flaming rocks as volcano erupts
Reuters
Now playing
01:49
Deadly Guatemala volcano covers villages in ash
ring of fire chad myers weather orig_00003221.jpg
ring of fire chad myers weather orig_00003221.jpg
Now playing
01:13
What is the 'Ring of Fire'?
lava meets ocean
CNN
lava meets ocean
Now playing
02:09
Watch fast-moving lava flow into Pacific Ocean
Now playing
00:46
Blue flames burn during Kilauea eruption
PAHOA, HI - MAY 5: In this handout photo provided by the U.S. Geological Survey, lava errupts from a new fissure from Luana Street after the eruption of Hawaii's Kilauea volcano on May 5, 2018 in the Leilani Estates subdivision near Pahoa, Hawaii. The governor of Hawaii has declared a local state of emergency near the Mount Kilauea volcano after it erupted following a 5.0-magnitude earthquake, forcing the evacuation of nearly 1,700 residents. (Photo by U.S. Geological Survey via Getty Images)
Handout/Getty Images North America/Getty Images
PAHOA, HI - MAY 5: In this handout photo provided by the U.S. Geological Survey, lava errupts from a new fissure from Luana Street after the eruption of Hawaii's Kilauea volcano on May 5, 2018 in the Leilani Estates subdivision near Pahoa, Hawaii. The governor of Hawaii has declared a local state of emergency near the Mount Kilauea volcano after it erupted following a 5.0-magnitude earthquake, forcing the evacuation of nearly 1,700 residents. (Photo by U.S. Geological Survey via Getty Images)
Now playing
01:12
Lava spills through Hawaii neighborhood
At 07:45 a.m. HST, today, lava from fissure 7 slowly advanced to the northeast on Hookapu Street in Leilani Estates subdivision on Kīlauea Volcano's lower East Rift Zone.
US Geological Survey
At 07:45 a.m. HST, today, lava from fissure 7 slowly advanced to the northeast on Hookapu Street in Leilani Estates subdivision on Kīlauea Volcano's lower East Rift Zone.
Now playing
01:15
Volcano eruption levels Hawaiian neighborhoods
In this image released by the U.S. Geological Survey, steam rises from cracks in the road shortly before a fissure opened up on Kaupili Street in the Leilani Estates subdivision, Friday, May 4, 2018, in Pahoa, Hawaii. The Kilauea volcano sent more lava into Hawaii communities Friday, a day after forcing more than 1,500 people to flee from their mountainside homes, and authorities detected high levels of sulfur gas that could threaten the elderly and people with breathing problems.
 (U.S. Geological Survey via AP)
U.S. Geological Survey/AP
In this image released by the U.S. Geological Survey, steam rises from cracks in the road shortly before a fissure opened up on Kaupili Street in the Leilani Estates subdivision, Friday, May 4, 2018, in Pahoa, Hawaii. The Kilauea volcano sent more lava into Hawaii communities Friday, a day after forcing more than 1,500 people to flee from their mountainside homes, and authorities detected high levels of sulfur gas that could threaten the elderly and people with breathing problems. (U.S. Geological Survey via AP)
Now playing
01:49
Strong earthquake rocks Hawaii
Jeremiah Osuna
Now playing
01:02
New volcanic activity in Hawaii
EDIT 7104    ADVISORY *FLASH*7104-INDONESIA-VOLCANO/TIMELAPSE-UGC  Bali volcano erupts second time in less than a week    Start: 26 Nov 2017 05:45 GMT    End: 26 Nov 2017 05:46 GMT    BALI, INDONESIA - Bali volcano erupts second time in less than a week.    Restrictions: PART MUST ON SCREEN COURTESY EMILION KUZMA-FLOYD / @EYES_OF_A_NOMAD
EMILIO KUZMA-FLOYD/BNPB HANDOUT
EDIT 7104 ADVISORY *FLASH*7104-INDONESIA-VOLCANO/TIMELAPSE-UGC Bali volcano erupts second time in less than a week Start: 26 Nov 2017 05:45 GMT End: 26 Nov 2017 05:46 GMT BALI, INDONESIA - Bali volcano erupts second time in less than a week. Restrictions: PART MUST ON SCREEN COURTESY EMILION KUZMA-FLOYD / @EYES_OF_A_NOMAD
Now playing
01:55
Thousands evacuated as volcano erupts
Now playing
01:06
Mexican volcano erupts multiple times in a day
CNN —  

Flights have been canceled across southern Japan after the country’s largest active volcano erupted, spewing thick clouds of ash high into the atmosphere.

Mount Aso rumbled to life on Monday morning, according to the Japan Meteorological Agency, causing disruption to air traffic serving Kumamoto Airport, 880 kilometers (550 miles) southwest of Tokyo.

Black smoke was sent as high as two kilometers, prompting the cancellation of at least 20 flights on Monday, according to NHK, Japan’s national public news network.

At least four more out-going flights from Kumamoto Airport, scheduled for early Tuesday have also been canceled.

ANA grounded at least two flights connecting Kumamoto, which is 20 kilometers from the volcano, to Osaka and Tokyo.

The airport serves mainly domestic routes, but has connections to Taiwan.

JAL announced on its website that “flights from and to Kumamoto airport are experiencing irregular operations.”

“We found that the smoke rose not only vertically but also horizontally. The eruption could have pyroclastic flows,” Sadayuki Kitagawa from the country’s meteorological agency says, referring to the fast currents of gas and hot rocks often emitted by active volcanoes.

Officials closed a four-kilometer-wide area around the crater and evacuated about 30 people.

The agency also issued a level three warning on its five-level scale, advising travelers to stay away from the volcano.

Mount Aso measures 128 kilometers in circumference and is 1,506 meters high.