Below you'll find a daily report brought to you by the NOAA about the solar activity and geophysical activity during the past day and the prediction for the coming days. This page is daily updated around midnight.
Solar and Geophysical Activity Summary 2026 Jun 18 0245 UTCBegin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 1410 1411 1411 400 1414 1414 1415 120 1457 1506 1510 4464 C2.5 210 1522 1522 1523 290
10 cm 111 SSN 050 Afr/Ap 007/006 X-ray Background B4.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 5.0e+05 GT 10 MeV 1.7e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 3.70e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W72 degrees) 3 Hour K-indices Boulder 2 2 ? ? ? ? ? ? Planetary 2 1 2 2 2 1 0 1
Missing Boulder K-indices: 12-15 = 3; 15-18 = 2; 18-21 = 1; 21-24 = 2. The magnetometer had a data outage during the 06-09 and 09-12 synoptic periods.
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| Last X-flare | 2026/06/03 | X1.0 |
| Last M-flare | 2026/06/06 | M1.8 |
| Last geomagnetic storm | 2026/06/11 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| May 2026 | 101.4 +22.1 |
| June 2026 | 104.7 +3.3 |
| Last 30 days | 108.3 +10.8 |