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 J. Fritz},
  journal={Science},
  year={1986},
  volume={233},
  pages={961 - 963}
}
A small Plinian eruption of the Nevado del Ruiz volcano in Colombia ejected 3.5 x 1010 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… 
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TLDR
It is argued that the recurring “breathing” of the shallow reservoir is the main cause of current eruptions at NRV.
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  • We are grateful to M. L. Calvache for collaboration in mapping of lahar deposits. H.S. and S.C. were supported bs National Science Foundation grant EA c-830618
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