A powerful eruption of Indonesia’s Anak Krakatau volcano has disrupted air travel, leaving around 270,000 passengers affected and grounding more than 2,000 flights. 

The volcano, located in the Sunda Strait between Java and Sumatra, has sent volcanic ash thousands of feet into the atmosphere, reaching areas around Jakarta and forcing several airports to close. 

Schools in several affected regions have moved classes online, while authorities have advised residents to limit outdoor activity and wear masks because of the ash.

Although the eruption has begun to ease, Indonesia’s Geological Agency warned that the possibility of additional eruptions remains high, with hazards including heavy ashfall, volcanic rocks and possible lava flows, the BBC has reported.

Anak Krakatau is especially closely monitored because an eruption in 2018 caused a tsunami that killed more than 400 people, although no tsunami warning has been issued for the current eruption.