Observed arrival · 2026-10-27
Earth Science Lab’s Earthquake Epicenter Finder
A browser-based classroom activity has students use seismograph readings to locate an earthquake.
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- For
- Earth science students aged 10–16 and their teachers
- Worth noticing
- Students turn S–P arrival-time gaps into distances, then triangulate the quake by drawing three circles.
Field notes
The finder has students work from three seismograph stations: they mark P and S waves, convert each arrival-time gap into a distance, and use circles to locate the quake. Its modes include guided hints, a scored challenge with three quakes, and an Explore view with a draggable travel-time graph. The page also lists an optional magnitude estimate and a printable activity with a teacher answer key.
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Editorial observations of this landing page, not a rating.
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◎NicheUnusually specific use
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