Viewing archive of Sunday, 21 October 2012
Geophysical report
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 295 Issued at 0245Z on 21 Oct 2012 This report is compiled from data received at SWO on 20 OctA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0722 0724 0724 160 1047 1047 1047 110 1118 1118 1118 300 1405 1405 1405 100 1805 1814 1819 1598 M9.0 280 II
B. Proton Events
C. Geomagnetic Activity Summary
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 151 SSN 112 Afr/Ap 003/001 X-ray Background B6.2 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.5e+06 GT 10 MeV 1.1e+04 p/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 5.50e+08 e/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 0 0 0 0 2 2 2 0 Planetary 0 0 0 0 0 0 1 1
F. Comments
The greater than 2 MeV electron fluence at geosynchronous orbit was at high levels.
All times in UTC
The density of the solar wind is moderate (37.3 p/cm3)
Latest news
X1.1 solar flare
Coronal hole faces Earth
Strong G3 geomagnetic storm watch for 23 March
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Latest alerts
18:33 UTC - Solar flare
Moderate M1.31 flare from sunspot region 4055
CME arrival, G3 storm watch
A coronal mass ejection has arrived at our planet. This is the first of possibly two coronal mass ejections that were expected to arrive from filament eruptions on April 12 and 13. The minor G1 geomagnetic storm threshold has already been reached and the NOAA SWPC has a strong G3 geomagnetic storm watch in place for tomorrow, 16 April. Keep an eye on the data here on this website in the hours ahead. There is more action to come!
18:12 UTC - Radio Blackout
Minor R1 radio blackout in progress (≥M1 - current: M1.15)
17:45 UTC - Geomagnetic activity
Minor G1 geomagnetic storm (Kp5) Threshold Reached: 17:32 UTC
17:30 UTC - Geomagnetic activity
Active geomagnetic conditions (Kp4) Threshold Reached: 17:25 UTC
Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/14 | M4.2 |
| Last geomagnetic storm | 2025/04/06 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2025 | 134.2 -20.4 |
| April 2025 | 128.8 -5.4 |
| Last 30 days | 129.1 -15.1 |