The ash was from cold lava, known as "lahar" in Javanese, a hot or cold mixture of water and rock fragments that flows down ...

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. Images shared by Indonesia’s disaster ...

scientists warn that the primary threat is not lava, but lahars-destructive mudflows that can engulf entire towns within minutes. Unlike traditional volcanic eruptions, lahars-fast-moving flows of ...