About
CME Tracker is a free, real-time visualization of coronal
mass ejections (CMEs) — the solar storms that travel from the Sun to Earth. It plots every
CME NASA has catalogued over the last 90 days as an expanding cone, propagates each one
outward with a drag-based physics model tuned by the live solar wind, and estimates
whether — and when — it will reach Earth.
Alongside the heliocentric map you get the live solar wind, IMF Bz, planetary
Kp index, GOES X-ray flares, today's sunspot regions, and an Earth globe rendered
from the Sun's point of view so you can see which face a storm would strike on arrival.
Data: NASA DONKI
& SDO,
and NOAA SWPC.
Time-of-event solar imagery via Helioviewer.
Arrival times are model estimates (validated to ±~12 h — see the guide) —
treat them as indicative, not operational guidance.
How to use this tracker →
Keys: space play · N now · ←/→ step · ↑/↓ select CME · scroll to zoom, drag to pan
© 2026 Mike DiCarlo · All rights reserved