Viewing archive of Thursday, 18 January 2024
Solar activity report
Report of Solar-Geophysical Activity 2024 Jan 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 18 Issued at 2200Z on 18 Jan 2024IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z 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
18/0408Z from Region 3553 (N05E03). There are currently 8 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 (19 Jan, 20 Jan,
21 Jan).
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 486 km/s at 18/0907Z. Total IMF reached 8 nT at
18/0335Z. The maximum southward component of Bz reached -5 nT at
18/0636Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 116 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (19 Jan) and quiet to unsettled levels
on days two and three (20 Jan, 21 Jan).
III. Event Probabilities 19 Jan to 21 Jan
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Jan 162 Predicted 19 Jan-21 Jan 162/160/155 90 Day Mean 18 Jan 153
V. Geomagnetic A Indices
Observed Afr/Ap 17 Jan 003/002 Estimated Afr/Ap 18 Jan 005/006 Predicted Afr/Ap 19 Jan-21 Jan 006/005-008/010-011/010
VI. Geomagnetic Activity Probabilities 19 Jan to 21 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 15% | 15% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 10% | 20% | 20% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/11/06 | X2.39 |
| Last M-flare | 2024/11/20 | M1.1 |
| Last geomagnetic storm | 2024/11/10 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| October 2024 | 166.4 +25 |
| November 2024 | 142.7 -23.8 |
| Last 30 days | 156.1 +4.7 |