What is Lahar ?

Lahar (cold): from Bhs Java, but has become an international term and is widely known among scholars of international volkanologi, is the flow of water (rainwater, snow melt) that mixed debris tefra (volcanic material-red) which still unravel, comes from the top of the volcanic body flows with high velocity and density so that they can

hit and brought along rocks to 2 meters in diameter. The temperature of lava is the same as the surrounding temperature, sediment is a breccia with fragments of lava that are sub rounded.

Hot lava: the same as lava (cold) temperatures just above ambient temperature. ONLY hot lava can be produced by a volcanic crater which has as G. LAKE Kelud, while the volcanic crater lakes have not impossible to produce hot lava. Temperature will not reach 100 C, a temperature increase is a result of crater lake water is heated by the magma before eruption, during eruption (no explosion). hot water that has overflowed this will mix with tefra (hereinafter as the process of cold lava), and forming lava deposits. Hot lava will not burn plants or living things such as the hot clouds !!!!, because the temperature is "only" under 100C.

http://www.dhanay.co.cc/2010/11/pengertian-lahar-dingin-dan-lahar-panas.html