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  1. No Access

    Article

    Chemical and isotopic compositions of fluids at Cumbal Volcano, Colombia: evidence for magmatic contribution

    We present chemical and isotopic data for fumarolic vapor and thermal spring discharges from Cumbal Volcano, SW Colombia. In 1988 Cumbal showed signs of apparent reactivation. Gases and steam condensates were...

    Jennifer L. Lewicki, Tobias Fischer, Stanley N. Williams in Bulletin of Volcanology (2000)

  2. Article

    Dead trees tell tales

    Stanley N. Williams in Nature (1995)

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  3. Article

    Playing with fire

    Monitoring Active Volcanoes: Strategies, Procedures and Techniques.

    Stanley N. Williams in Nature (1995)

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  4. No Access

    Article

    Correlations between SO2 flux and long-period seismicity at Galeras volcano

    THE 14 January 1993 eruption of Galeras volcano, in Colombia, which killed six scientists and three tourists1, was followed by a larger eruption on 23 March 19932. Both eruptions were preceded by episodes of long...

    Tobias P. Fischer, Meghan M. Morrissey, V. Marta Lucía Calvache, M. Diego Gòmez… in Nature (1994)

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    Article

    The hydrothermal system of Volcan Puracé, Colombia

    This paper presents chemical and isotopic data for thermal waters, gases and S deposits from Volcan Puracé (summit elevation ∼4600 m) in SW Colombia. Hot gas discharges from fumaroles in and around the summit ...

    Neil C Sturchio, Stanley N Williams, Yuji Sano in Bulletin of Volcanology (1993)

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    Article

    The hydrothermal system of Nevado del Ruiz volcano, Colombia

    Hot springs and steam vents on the slopes of Nevado del Ruiz volcano provide evidence regarding the nature of hydrothermal activity within the summit and flanks of the volcano. At elevations below 3000 m, alka...

    Neil C. Sturchio, Stanley N. Williams, Nestor P. Garcia… in Bulletin of Volcanology (1988)

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    Article

    Lahars initiated by the 13 November 1985 eruption of Nevado del Ruiz, Colombia

    The eruption of Nevado del Ruiz in Colombia on 13 November 1985 was accompanied by the formation of four lahars (mud flows) triggered by the melting of glacial ice near the summit of the volcano. The lahars be...

    Donald R. Lowe, Stanley N. Williams, Henry Leigh, Charles B. Connort… in Nature (1986)

  8. No Access

    Article

    Fault location by radon and mercury detection at an active volcano in Nicaragua

    The Masaya Caldera Complex, Nicaragua, with the active crater, Santiago (Fig. 1), is the site of present-day basaltic volcanism1,2. Some of the faults that bound the caldera and lie within it can be located geolo...

    William B. Crenshaw, Stanley N. Williams, Richard E. Stoiber in Nature (1982)