Seismic Shadow ZoneSeismic Shadow ZoneWhen an earthquake occurs, seismic waves travel through Earth's interior. The liquid outer core refracts P-waves away from their straight-line path, leaving a shadow zone — a band where no direct P arrivals are detected. S-waves cannot propagate through liquid at all, so they are blocked entirely beyond ~105°. The exact boundaries shift with core size and composition; try the presets to explore how structure shapes the shadow.
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