Science & ClimateScienceDaily1 min read9/22/2026 (2h ago)

A strange circle on satellite maps turned out to be a 390-million-year-old impact crater

A strange circle on satellite maps turned out to be a 390-million-year-old impact crater
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An amateur astronomer searching satellite maps for a Quebec camping spot accidentally discovered a massive ancient impact crater. Scientists later found shatter cones that confirmed the 25-kilometer-wide structure was blasted into Earth roughly 390 million years ago.

Key Takeaways

  • An amateur astronomer searching satellite maps for a Quebec camping spot accidentally discovered a massive ancient impact crater.
  • Scientists later found shatter cones that confirmed the 25-kilometer-wide structure was blasted into Earth roughly 390 million years ago.
  • Full details and original dispatch available below.

An amateur astronomer searching satellite maps for a Quebec camping spot accidentally discovered a massive ancient impact crater. Scientists later found shatter cones that confirmed the 25-kilometer-wide structure was blasted into Earth roughly 390 million years ago.

Original Publisher Attribution

This summary was curated from ScienceDaily.

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A strange circle on satellite maps turned out to be a 390-million-year-old impact crater — Loop60