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

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 ...

Cold lava, also known as "lahar" in Javanese, comprises a mixture of water and rock fragments that flows rapidly down the slopes of a volcano, entering river valleys and spreading across wide areas.