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CISOSE26 Local AI Uedu Code UG26
政治大學 AQI 57 26°C PM2.5 11
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Uedu Earth Science · Interdisciplinary General Education

From the plates beneath our feet to the stars above

From solid Earth, atmospheric science and ocean science to astronomy, space and changes to the Earth's environment.
Spanning high-school Earth science and undergraduate introductory Earth science, each article is marked with its level and includes a concept diagram.

46
readings
23
Topic category
10
Terminology
Solid Earth · Seismic wave observations DEMO
Vp≈6 km/s (crust) Vs≈3.5 km/s Δt=8 s
8s
P–S to time difference Δt
≈64km
Approximate distance to the epicentre
6km/s
P-wave velocity (approx.)
3.5km/s
S-wave velocity (approx.)
d ≈ 8 × Δt (km, approximate) P wave (longitudinal wave) arrives first · S wave (transverse wave) arrives later
Teaching example waveform · Omori’s empirical formula d≈8×Δt is an approximate estimate · not real-time observational data

Seismogram demo · d ≈ 8 × 8 ≈ 64 km

Topic category

Start from a subject cluster and gradually build a complete map of Earth science

固體地球 Solid Earth & Geology

大氣科學 Atmospheric Science

海洋科學 Oceanography

地球環境與變遷 Earth System & Change

Notes for use

This section contains original educational material intended to build conceptual frameworks; the illustrations are conceptual diagrams generated by AI (not precise geological/astronomical charts). For deeper study, please still refer to textbooks and authoritative teaching materials.