The volcano, located on Ruang Island, has issued Indonesia's highest alert level, warning of possible volcanic material collapsing into the ocean.

The eruptions have resulted in flight cancellations and airport closures due to the ash clouds and smoke.

Mount Ruang, a stratovolcano in North Sulawesi, Indonesia, experienced new eruptions on Tuesday, prompting the National Disaster Management Authority (BNPB) to raise alert levels and advise the public to evacuate, wear protective masks, and exercise caution.

The eruptions caused huge crowds at ports and towering ash plumes, leading to closures of at least seven airports and school closures to protect children from volcanic ash.

Dramatic footage showed ash cascading into the air.

Stratovolcanoes are conical and steep-sided due to the formation of viscous, sticky lava.

Mount Ruang, a stratovolcano, has recently erupted, leading to the build-up of volcanic ash in the air.

This ash has entered eastern Malaysian airspace, prompting Malaysia's meteorological department, Met Malaysia, to closely monitor the situation and issue aviation weather warnings if necessary.

As a result, regional carrier Air Asia canceled 21 flights, and guests were encouraged to check for cancellation notifications.

Malaysia Airlines also issued similar travel advisories and canceled several flights in the area.

Indonesia, a country with over 270 million people and 120 active volcanoes, is located along the Ring of Fire.

Mount Ruang, one of its volcanoes, recently erupted in April, causing over 200 flight disruptions and affecting tens of thousands of passengers.

Evacuations were necessary due to concerns of a partial collapse and potential tsunami, as previously occurred in 1871.