Huge ash cloud from Chile volcano blankets region and forces flight cancellations

An ash cloud from the Calbuco volcano in southern Chile that erupted unexpectedly this week was blowing into Chile and Argentina, forcing the cancellation of flights from nearby cities in both countries and blanketing residents in ash.
The volcano, which last had a major eruption in 1961, has belched a spectacular plume of ash and smoke around 15km into the sky near the popular tourist town of Puerto Varas, some 1,000km south of Santiago.
Calbuco erupted twice since Wednesday and has now paused, but it remains unstable and could erupt again, experts said.
WATCH: Time-lapse video of the Calbuco volcano erupting
Winds have already carried part of the ash cloud to the city of Chillan, some 400km south of Santiago, and could reach the capital soon, said government meteorologist Arnoldo Zuniga.
Most of the ash, however, was headed over the Andes mountains into neighbouring Argentina, and weather experts said it could reach as far as Buenos Aires province, some 1,500km to the east.