Viewing archive of Tuesday, 20 February 2024
Solar activity report
Report of Solar-Geophysical Activity 2024 Feb 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 51 Issued at 2200Z on 20 Feb 2024IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
20/1556Z. There are currently 4 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 (21 Feb, 22 Feb,
23 Feb).
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 363 km/s at 20/0031Z. Total IMF reached 9 nT at
20/1922Z. The maximum southward component of Bz reached -8 nT at
20/1951Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 120 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (21 Feb, 22 Feb, 23
Feb).
III. Event Probabilities 21 Feb to 23 Feb
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Feb 153 Predicted 21 Feb-23 Feb 155/155/150 90 Day Mean 20 Feb 163
V. Geomagnetic A Indices
Observed Afr/Ap 19 Feb 001/001 Estimated Afr/Ap 20 Feb 010/010 Predicted Afr/Ap 21 Feb-23 Feb 006/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 21 Feb to 23 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 20% | 20% | 20% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/10/31 | X2.03 |
| Last M-flare | 2024/11/05 | M2.6 |
| Last geomagnetic storm | 2024/10/12 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| September 2024 | 141.4 -74.1 |
| November 2024 | 215.8 +74.4 |
| Last 30 days | 161.1 +7.2 |