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Solar activity report
Report of Solar-Geophysical Activity 2024 Jun 17 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 169 Issued at 2200Z on 17 Jun 2024IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
17/0804Z from Region 3712 (S26W12). There are currently 7 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(18 Jun, 19 Jun, 20 Jun).
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 543 km/s at 17/0513Z. Total IMF reached 11
nT at 17/1426Z. The maximum southward component of Bz reached -9 nT at
17/1700Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (18 Jun), quiet to unsettled
levels on day two (19 Jun) and quiet levels on day three (20 Jun).
Protons have a slight chance of crossing threshold on day one (18 Jun)
and have a slight chance of crossing threshold on days two and three (19
Jun, 20 Jun).
III. Event Probabilities 18 Jun to 20 Jun
| Class M | 55% | 55% | 55% |
| Class X | 10% | 10% | 10% |
| Proton | 15% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Jun 180 Predicted 18 Jun-20 Jun 180/180/180 90 Day Mean 17 Jun 176
V. Geomagnetic A Indices
Observed Afr/Ap 16 Jun 009/013 Estimated Afr/Ap 17 Jun 009/010 Predicted Afr/Ap 18 Jun-20 Jun 014/015-008/008-006/005
VI. Geomagnetic Activity Probabilities 18 Jun to 20 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 10% |
| Minor storm | 20% | 05% | 01% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 30% | 25% | 20% |
| Major-severe storm | 50% | 30% | 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 |