Hot lava flows down the Mount Sinabung volcano in the night in Karo, North Sumatra on July 30, 2017. Sinabung roared back to life in 2010 for the first time in 400 years. After another period of inactivity it erupted once more in 2013, and has remained highly active since. (Photo by Tibta Pangin/AFP Photo)





In this June 6, 2018 file photo, the caldera on the Kilauea Volcano emits a small amount of steam with the lower east rift zone eruption lava access point in Kapoho putting out much more in the distance continues in Pahoa, Hawaii. (Photo by L.E. Baskow/AP Photo)





Mount Agung volcano spews hot volcanic ash into the air as seen from Kubu Village in Karangasem, Bali, Indonesia, 29 June 2018. The ash cloud out of Mount Agung was reported to have reached a height of 2000 m after it began to erupt on the evening of 28 June. The Ngurah Rai International Airport in Bali was shut down at 03.00 am on the 29 June 2018 due to hazards related to the ash cloud. (Photo by Made Nagi/EPA/EFE)





The Shinmoe volcano is seen after eruption, Kirishima, Kagoshima prefecture, Japan in this photo taken by Kyodo on October 11, 2017. (Photo by Reuters/Kyodo News)





A column of robust, reddish-brown ash plume occurred after a magnitude 6.9 South Flank of Kīlauea earthquake shook the Big Island of Hawaii, May 4, 2018. (Photo by U.S. Geological Survey via AP Photo)





This photo taken late on November 5, 2017 shows the eruption of Mount Sinabung volcano in Karo, North Sumatra. Sinabung roared back to life in 2010 for the first time in 400 years, after another period of inactivity it erupted once more in 2013, and has remained highly active since. (Photo by Ivan Damanik/AFP Photo)





Mount Sinabung volcano spews thick volcanic ash, as seen from Brastagi, in Karo, North Sumatra province, on May 24, 2017. Sinabung roared back to life in 2010 for the first time in 400 years. After another period of inactivity, it erupted once more in 2013 and has remained highly active since. (Photo by Tibta Pangin/AFP Photo)





Stars shine above as a plume rises from the Halemaumau crater, illuminated by glow from the crater's lava lake, within the Kilauea volcano summit at the Hawaii Volcanoes National Park on May 9, 2018 in Hawaii Volcanoes National Park, Hawaii. (Photo by Mario Tama/Getty Images)





This picture taken on April 28, 2018 shows lighting and thunder over Mount Sinabung volcano in Karo. Sinabung roared back to life in 2010 for the first time in 400 years, after another period of inactivity it erupted once more in 2013, and has remained highly active since. (Photo by Lana Priatna/AFP Photo)





In this May 9, 2018, file photo, visitors take pictures as Kilauea's summit crater glows red in Volcanoes National Park, Hawaii. The small, rural town of Pahoa is the gateway to the eruption pouring rivers of lava out of Hawaii's Kilauea volcano. However, tourists are avoiding it because the county, citing safety concerns, isn't allowing the public to get close enough to the lava. (Photo by Jae C. Hong/AP Photo)





View of the Villarrica volcano taken from Pucon, some 800 kilometres south of Santiago, showing signs of activity on December 06, 2017. (Photo by Christian Miranda/AFP Photo)





Mount Sinabung volcano spews thick volcanic ash, as seen from the town of Brastagi in Karo, North Sumatra province, on May 30, 2017. Sinabung roared back to life in 2010 for the first time in 400 years and after another period of inactivity, erupted once more in 2013 and has remained highly active since. (Photo by Tibta Pangin/AFP Photo)





This June 30, 2018 file photo from the U.S. Geological Survey shows fountains from the fissure 8 spatter cone continuing to supply lava to an open channel above the former village of Kapoho on the island of Hawaii. (Photo by U.S. Geological Survey via AP Photo)





The Mayon volcano continues to erupt as the sun sets behind Legazpi city, Thursday, January 25, 2018 in Albay province, roughly 340 kilometers, (200 miles) southeast of Manila, Philippines. (Photo by Bullit Marquez/AP Photo)





Lava from Mayon volcano is seen as it erupts in Legazpi on January 15, 2018. The Philippines raised the alert level for the country's most active volcano twice in 24 hours on January 14, meaning that a hazardous eruption is possible within days. (Photo by Charism Sayat/AFP Photo)





The Mayon volcano spews lava as it continues to erupt, as seen from Daraga town, in Albay province, south of Manila on January 23, 2018. Intense lava fountains shot like fireworks up to 700 metres (2,300 feet) into the air above Mayon, the Philippines' most active volcano, on January 23 as showering debris turned morning skies dark and spread fear among anxious residents. (Photo by Linus Escandor II/AFP Photo)





This May 6, 2018 photo shows the lava lake at the summit of Kilauea near Pahoa, Hawaii. Hawaii's erupting Kilauea volcano has destroyed homes and forced the evacuations of more than a thousand people. (Photo by U.S. Geological Survey via AP Photo)





In this aerial image, volcanic ash spews from the crater of Mt. Shinmoedake on October 11, 2017 in Kirishima, Kagoshima, Japan. The eruption sends a plume of ash 300 meters into the air. The volcano, part of the Kirishima range in southern Kyushu, straddles the border of Miyazaki and Kagoshima prefectures. It previously erupted September 7, 2011. (Photo by The Asahi Shimbun via Getty Images)





Mount Etna volcano spews lava during an eruption early Saturday, August 25, 2018. Mount Etna in Sicily has roared back into spectacular volcanic action, sending up plumes of ash and spewing lava. Italy's National Institute of Geophysics and Vulcanology (INGV) says that the volcano, which initially “re-awoke” in late July, sprang into fuller action Thursday evening by shooting up chunks of flaming lava as high as 150 meters (500 feet) almost constantly. (Photo by Salvatore Allegra/AP Photo)





The Villarrica Volcano is seen at night from Pucon town, Chile, September 24, 2018. (Photo by Cristobal Saavedra Escobar/Reuters)