An avalanche volcanic water and mud down the slopes of a volcano

Usage examples of lahar.

He saw an ash fall—tephra—followed by a lahar, a fast-moving slurry of hot mud made of ash, dirt, and glacier melt.

What they cannot see, from where they stand, is the lahar breaking up into long fingers, finding channels already carved and ripped in the land, blowing out the last of its energy, reaching, reaching, but growing weaker.

They crawl up the bank to safety, but the lahar vaults up and the spill catches them as they raise their arms.

According to my map and GPS we were circumnavigating a cluster of active volcanoes that frequently spew out lahars (mud avalanches) which, when they impact upon ruts in the jungle that I'm here calling roads, cause logistical problems well into the realm of the absurd.

A few lahars came through the area, wiped out some villages, redirected some rivers, displaced many people.

Enoch Root explains that this is a place where a small lahar, which had been funneled between the steep walls of the river's gorge farther upstream, spread out and mowed down a few hectares of ancient trees, clearing the path for smaller, opportunistic vegetation.

Enoch Root explains that this is a place where a small lahar, which had been funneled between the steep walls of the river’s gorge farther upstream, spread out and mowed down a few hectares of ancient trees, clearing the path for smaller, opportunistic vegetation.