Viewing archive of Monday, 22 May 2017
Solar activity report
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 142 Issued at 2200Z on 22 May 2017IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z
IB. Solar Activity Forecast
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
IIB. Geophysical Activity Forecast
III. Event Probabilities 23 May to 25 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 May 074 Predicted 23 May-25 May 075/075/075 90 Day Mean 22 May 077
V. Geomagnetic A Indices
Observed Afr/Ap 21 May 010/009 Estimated Afr/Ap 22 May 007/009 Predicted Afr/Ap 23 May-25 May 007/008-007/008-005/005
VI. Geomagnetic Activity Probabilities 23 May to 25 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 05% | 10% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 15% | 15% |
| Major-severe storm | 20% | 05% | 10% |
All times in UTC
Current data suggests there is a moderate possibility for aurora to appear at the following high latitude regions in the near future
ReykjavikCurrent data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future
TórshavnOulu
Trondheim
Luleå, Sundsvall, Umeå
Latest news
X1.1 solar flare
Coronal hole faces Earth
Strong G3 geomagnetic storm watch for 23 March
Latest forum messages
Support SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Latest alerts
Tuesday, 8 April 2025
23:57 UTC - Hemispheric Power Index
The OVATION model predicts the Hemispheric Power Index to reach 50GW at 00:44 UTC
22:42 UTC - Solar flare
Moderate M1.57 flare
22:24 UTC - Radio Blackout
Minor R1 radio blackout in progress (≥M1 - current: M1.52)
15:15 UTC - Geomagnetic activity
Minor G1 geomagnetic storm (Kp5) Threshold Reached: 14:59 UTC
06:30 UTC - Type II Radio Emission
Begin Time: 08/04/2025 05:53 UTC Estimated Velocity: 456km/sec.
Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/08 | M1.5 |
| 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 | 151.3 +17.1 |
| Last 30 days | 137.4 +0.1 |