This is where our earthquake data is born: real instruments in the ground, streaming around the clock. Click any triangle to watch how the ground is moving there right now — from Greenland to Antarctica.
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A seismogram is the vertical motion of the ground, drawn over time. The ground is never perfectly still: traffic, wind, ocean waves and distant quakes keep every trace alive. What matters is the ratio — how much larger the current swing is than the station's own quiet level. That is the number we show, and the color of each triangle.
When a significant earthquake happens anywhere on Earth, its waves sweep across this map: nearby stations spike first, distant ones minutes later — the wave needs time to travel through the planet.
Honesty note: the traces are shown in raw instrument counts, not physical units. Converting to ground velocity would require deconvolving each instrument's response, which we do not do — so we never print nm/s. The shape and the relative level are true as shown.
GEOFON GE network — GEOFON Data Centre, GFZ Helmholtz Centre Potsdam. Licensed CC BY 4.0, free for commercial use with attribution. Cite as: GEOFON Data Centre (1993): GEOFON Seismic Network. GFZ, doi:10.14470/TR560404.
Hungarian national network (HU) — Kövesligethy Radó Seismological Observatory, served via GEOFON/EIDA. Waveform windows on this page refresh every 15 minutes; each trace covers the past 3 hours (Hungarian stations: 30 minutes).