Eruption of the nevado del ruiz volcano, Colombia, on 13 november 1985: tephra fall and lahars.

@article{Naranjo1986EruptionOT,
  title={Eruption of the nevado del ruiz volcano, Colombia, on 13 november 1985: tephra fall and lahars.},
  author={J L Naranjo and Haraldur Sigurdsson and Steven Carey and William Fritz},
  journal={Science},
  year={1986},
  volume={233 4767},
  pages={961-3}
}
A small Plinian eruption of the Nevado del Ruiz volcano in Colombia ejected 3.5 x 10(10) kilograms of mixed dacite and andesite tephra on 13 November 1985, with a maximum column height of 31 kilometers above sea level. Small pyroclastic flows and surges, generated during the initial stage of the eruption, caused surface melting of approximately 10% of the volcano's ice cap, leading to meltwater floods. The erosive floods incorporated soils and loose sediments from the volcano's flanks and… CONTINUE READING