Mount Marapi in West Sumatra, Indonesia, is showing increased volcanic activity, prompting urgent warnings from officials. With rain falling on the slopes, the risk of cold lava floods—fast-moving ...

In these flows, the lava erupts at temperatures of around 1,100 to 1,250°C (2,012 to 2,282°F). At Ol Doinyo Lengai, the lava erupts at a much cooler 510°C (950°F).

Or burning hot lava pouring down the side of a mountain. But you’re right that there have been news reports that mention cold lava. I talked about what that could be with my friend Katie Cooper.

Cold lava, also known as lahar, is a mixture of volcanic debris such as ash, sand and pebbles that flows down a volcano’s slopes during wet weather.

Lava and ash continues to spew from the erupting Mount Lewotobi, Flores, as locals fear threat of cold lava flows and flooding. Footage shows the volcano emitting clouds of ash on July 30.

By Heather Chen and Lucas Lilieholm, CNN (CNN) — At least 37 people have been killed, and more than a dozen injured on the Indonesian island of ...

PADANG, Indonesia — Rescuers recovered more bodies Monday after monsoon rains triggered flash floods on Indonesia's Sumatra Island over the weekend, bringing down torrents of cold lava and mud ...

Cold lava, also known as lahar, is a mixture of volcanic debris such as ash, sand and pebbles that flows down a volcano’s slopes during wet weather.

PADANG, Indonesia (AP) — Rescuers have recovered more bodies after monsoon rains triggered flash floods on Indonesia’s Sumatra Island, bringing down torrents of cold lava and mud. At least 43 ...