Viewing archive of Saturday, 11 February 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Feb 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 42 Issued at 2200Z on 11 Feb 2023IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z Solar activity has been at high levels for the past 24 hours.
The largest solar event of the period was a X1 event observed at
11/1548Z from Region 3217 (S09E36). There are currently 10 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be moderate
with a chance for X-class flares on days one, two, and three (12 Feb, 13
Feb, 14 Feb).
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 548 km/s at 10/2246Z. Total IMF reached 7
nT at 11/1550Z. The maximum southward component of Bz reached -5 nT at
11/0751Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 981 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (12 Feb, 13 Feb, 14
Feb). Protons have a slight chance of crossing threshold on days one,
two, and three (12 Feb, 13 Feb, 14 Feb).
III. Event Probabilities 12 Feb to 14 Feb
| Class M | 80% | 75% | 75% |
| Class X | 30% | 25% | 25% |
| Proton | 15% | 15% | 15% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 Feb 210 Predicted 12 Feb-14 Feb 210/205/205 90 Day Mean 11 Feb 156
V. Geomagnetic A Indices
Observed Afr/Ap 10 Feb 012/012 Estimated Afr/Ap 11 Feb 011/012 Predicted Afr/Ap 12 Feb-14 Feb 007/008-006/005-005/005
VI. Geomagnetic Activity Probabilities 12 Feb to 14 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 15% |
| Minor storm | 05% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 20% | 20% |
| Major-severe storm | 25% | 20% | 20% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/23 | M1.0 |
| 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 | 106.6 -45.9 |
| Last 30 days | 116.1 -41.8 |