Viewing archive of Saturday, 22 April 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Apr 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 112 Issued at 2200Z on 22 Apr 2023IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C4 event observed at
22/0148Z from Region 3279 (S19W64). There are currently 6 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (23 Apr, 24 Apr,
25 Apr).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 457 km/s at 22/1152Z. Total IMF reached 6
nT at 21/2100Z. The maximum southward component of Bz reached -5 nT at
21/2113Z. Protons greater than 10 MeV at geosynchronous orbit reached a
peak level of 2 pfu at 22/2010Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 143 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (23 Apr), unsettled to
major storm levels on day two (24 Apr) and quiet to active levels on day
three (25 Apr). Protons have a slight chance of crossing threshold on
days one, two, and three (23 Apr, 24 Apr, 25 Apr).
III. Event Probabilities 23 Apr to 25 Apr
| Class M | 35% | 35% | 35% |
| Class X | 01% | 01% | 01% |
| Proton | 15% | 15% | 15% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Apr 141 Predicted 23 Apr-25 Apr 140/135/135 90 Day Mean 22 Apr 159
V. Geomagnetic A Indices
Observed Afr/Ap 21 Apr 008/009 Estimated Afr/Ap 22 Apr 007/008 Predicted Afr/Ap 23 Apr-25 Apr 009/013-026/038-013/015
VI. Geomagnetic Activity Probabilities 23 Apr to 25 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 25% | 30% |
| Minor storm | 30% | 35% | 15% |
| Major-severe storm | 10% | 35% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 05% | 15% |
| Minor storm | 20% | 20% | 30% |
| Major-severe storm | 20% | 79% | 45% |
All times in UTC
Latest news
Monday, 23 December 2024
M9.0 solar flare with earth-directed CME
Sunday, 8 December 2024
X2.2 solar flare, SDO outage
Thursday, 21 November 2024
Major far side eruption, S1 radiation storm
Latest forum messages
AR13936 4AR 3936 4AR 3938 92024/12/23 AR13932 M8.9 & M4.1 associated CMEs 45Ask your obscure/"stupid" space weather questions. 136
More topicsSupport 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!
Space weather facts
| Last X-flare | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/25 | M4.9 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2024 | 152.5 -13.9 |
| December 2024 | 115.2 -37.3 |
| Last 30 days | 118.5 -39.1 |