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Government or official record

Nevado del Ruiz: knowing it is the key to protecting life

Colombian Geological Survey

Where this source supports the record

Each entry separates the article’s editorial relevance note from its exact, section-level claims. A bibliography link without a direct claim is labeled plainly.

  1. Natural disasters · 13 November 1985

    Armero Tragedy

    Ruins of Armero · Colombia

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    Why editors use it here

    Colombian volcanological context connecting the 1985 disaster with current monitoring and public preparedness.

    1. Quick read

      On 13 November 1985, a relatively small eruption of glacier-covered Nevado del Ruiz generated fast lahars that followed river valleys into populated areas.

      Reviewed 4 August 2026
    2. Trigger and conditions

      An explosive eruption melted and mobilized summit snow and ice during stormy weather.

      Reviewed 4 August 2026
    3. Uncertainty

      Casualty totals vary by source and by whether surrounding communities are counted with Armero.

      Reviewed 4 August 2026
    4. Why it matters

      Armero shows that forecasting a hazard is not the same as protecting people.

      Reviewed 4 August 2026