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Government or official record

115 Years Ago: The Tunguska Asteroid Impact Event

NASA

Cross-File evidence ledger

Where this source supports the record

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

  1. Unresolved phenomena · 30 June 1908

    The Tunguska Event

    Forest near the Podkamennaya Tunguska River · Russia

    Open File evidence →
    Why editors use it here

    NASA history summarizing testimony, delayed investigation, and current airburst estimates.

    1. Quick read

      A brilliant fireball and immense atmospheric explosion occurred over a remote part of central Siberia.

      Reviewed 24 July 2026
    2. Trigger and conditions

      An extraterrestrial object entered the atmosphere at high speed and released most of its energy above the ground.

      Reviewed 24 July 2026
    3. Uncertainty

      An atmospheric cosmic-object airburst is the strong consensus.

      Reviewed 24 July 2026
    4. Why it matters

      The event turns an abstract planetary risk into a place-based historical record.

      Reviewed 24 July 2026