CME activity today
Tuesday, Sep 15, 2026 · data updated · refreshes every 15 minutes
An Earth-directed CME is inbound: launched Sep 13, 21:12 UT at 645 km/s, estimated to arrive Sep 16, 12:58 UT. 1 more Earth-directed CME is behind it. Geomagnetic conditions are calm: Kp 0.7, below storm level.
582 km/s
Solar wind speed at L1
Kp 0.7
Geomagnetic activity
+8.6 nT
IMF Bz (southward = storm fuel)
51
Sunspot number
NOAA flare odds today: 5% chance of an M-class flare, 1% chance of X-class.
1CMEs launched in the past 48 hours
| Launched | Speed | Source region | Earth impact |
|---|---|---|---|
| Sep 14, 17:24 UT ↗ | 461 km/s (slow) | — | not Earth-directed |
| Sep 14, 11:08 UT ↗ | 744 km/s (common) | S11W38 | est. arrival Sep 16, 20:41 UT |
| Sep 13, 21:12 UT ↗ | 645 km/s (common) | S10W10 | est. arrival Sep 16, 12:58 UT |
| Sep 13, 19:48 UT ↗ | 1305 km/s (occasional) | S10W10 | est. arrived Sep 15, 10:55 UT |
Every CME above is plotted on the live map — open it to watch them move outward in real time, or filter out the slow ones.
2What to do with this
- Watching for aurora? The aurora tonight page turns these numbers into a where-can-I-see-it answer.
- New to CMEs? Start with what a coronal mass ejection actually is.
- Want the alert instead of checking? The tracker has a free mailing list — storm alerts only, no noise.