Villagers wearing protective face masks for protection from volcanic ash sit on the pick-up truck following the eruption of Mount Semeru volcano in Supiturang, Lumajang, East Java province, Indonesia December 6, 2021, in this photo taken by Antara. Ari Bowo Sucipto/Antara Foto via REUTERS.

An Indonesian rescue officer stands among trees covered with volcanic ash as he looks for a victim in an area affected by the eruption of Mount Semeru volcano in Sumber Wuluh, Lumajang, East Java Province, Indonesia December 6, 2021, in this photo taken by Antara. Zabur Karuru/Antara Foto via REUTERS.

General view of a damaged house covered with volcanic ash in an area affected by the eruption of Mount Semeru volcano in Curah Roboan, Pronojiwo district, Lumajang, Indonesia, December 6, 2021.

People take photos near tree trunks covered in volcanic ash following the eruption of Mount Semeru volcano in Lumajang, East Java Province, Indonesia December 5, 2021, in this photo taken by Antara Foto/Umarul Faruq/via REUTERS.

Laundry hanging on clotheslines is pictured covered by volcanic ash spewed out of Mount Semeru in Sumber Wuluh Village, Lumajang, East Java province, Indonesia December 5, 2021, in this photo taken by Antara Foto/Umarul Faruq/via REUTERS.

A villager carries his belongings during an evacuation after volcanic ash spewed out of Mount Semeru hit Sumber Wuluh Village, Lumajang, East Java province, Indonesia December 5, 2021, in this photo taken by Antara Foto/Zabur Karuru/via REUTERS.

Photographs covered with volcanic ash are pictured in Sumber Wuluh, following the eruption of Mount Semeru volcano, East Java province, Indonesia December 6, 2021, in this photo taken by Antara. Umarul Faruq/Antara Foto via REUTERS.

Indonesian rescue officers find a victim in an area affected by the eruption of Mount Semeru volcano in Sumber Wuluh, Lumajang, East Java Province, Indonesia December 6, 2021, in this photo taken by Antara Foto/Zabur Karuru/via REUTERS.

An aerial view of damaged houses at an area affected by the eruption of Mount Semeru volcano in Curah Roboan, Pronojiwo district, Lumajang, Indonesia, December 6, 2021.

General view of a damaged house covered with volcanic ash in an area affected by the eruption of Mount Semeru volcano in Curah Roboan, Pronojiwo district, Lumajang, Indonesia, December 6, 2021.

An aerial view shows volcanic ash rising affected by the Mount Semeru volcano during an eruption in Sumber Wuluh village, Lumajang, East Java province, Indonesia December 5, 2021, in this photo taken by Antara Foto/Zabur Karuru/via REUTERS.

A dead animal is covered in volcanic ash at Sumberwuluh village, following the eruption of Mount Semeru volcano in Lumajang regency, East Java province, Indonesia, December 5, 2021.

Victims of the eruption of Mount Semeru volcano are seen at a local hospital in Lumajang, East Java province, Indonesia December 5, 2021, in this photo taken by Antara Foto/Seno/via REUTERS.

An Indonesian soldier walks past damage trucks at Sumberwuluh village following the eruption of Semeru mount volcano in Lumajang regency, East Java province, Indonesia, December 5, 2021.

Villagers walk near a house covered by volcanic ash spewed out of Mount Semeru in Sumber Wuluh Village, Lumajang, East Java province, Indonesia December 5, 2021, in this photo taken by Antara Foto/Zabur Karuru/via REUTERS.

Indonesian military officers walk through a street covered with volcanic ash following the eruption of Mount Semeru volcano in Sumber Wuluh, Lumajang, East Java province, Indonesia December 6, 2021, in this photo taken by Antara. Zabur Karuru/Antara Foto via REUTERS.

Indonesian rescue officers carry the body of a victim of the Mount Semeru volcano eruption in Sumber Wuluh village, Lumajang, East Java Province, Indonesia December 6, 2021, in this photo taken by Antara Foto/Zabur Karuru/via REUTERS.

Villagers sit on a pick-up truck during an evacuation following the eruption of Mount Semeru volcano in Lumajang, East Java Province, Indonesia December 5, 2021, in this photo taken by Antara Foto/Umarul Faruq/via REUTERS.

A villager carries his bed to be evacuated after volcanic ash spewed out of Mount Semeru hit Sumber Wuluh Village, Lumajang, East Java province, Indonesia December 5, 2021, in this photo taken by Antara Foto/Zabur Karuru/via REUTERS.

Trees covered with volcanic ash are seen in an area affected by the eruption of Mount Semeru volcano in Candipuro district, Lumajang, Indonesia, December 6, 2021.