Viewing archive of Wednesday, 28 February 2024
Solar activity report
Report of Solar-Geophysical Activity 2024 Feb 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 59 Issued at 2200Z on 28 Feb 2024IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C5 event observed at
28/0909Z. There are currently 7 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
days one, two, and three (29 Feb, 01 Mar, 02 Mar).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached an estimated peak of 470 km/s. Total IMF reached 5 nT at
28/0956Z. The maximum southward component of Bz reached -5 nT at
28/0956Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 128 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one, two, and three (29 Feb,
01 Mar, 02 Mar). Protons have a slight chance of crossing threshold on
days one, two, and three (29 Feb, 01 Mar, 02 Mar).
III. Event Probabilities 29 Feb to 02 Mar
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 15% | 15% | 15% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Feb 180 Predicted 29 Feb-02 Mar 180/175/170 90 Day Mean 28 Feb 163
V. Geomagnetic A Indices
Observed Afr/Ap 27 Feb 009/011 Estimated Afr/Ap 28 Feb 008/008 Predicted Afr/Ap 29 Feb-02 Mar 007/008-007/008-008/008
VI. Geomagnetic Activity Probabilities 29 Feb to 02 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 25% | 25% |
| Major-severe storm | 15% | 20% | 20% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/04 | M1.0 |
| Last geomagnetic storm | 2026/04/03 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 125 +39.1 |
| Last 30 days | 99.5 +41.7 |
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