Viewing archive of Thursday, 17 October 2024
Solar activity report
Report of Solar-Geophysical Activity 2024 Oct 17 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 291 Issued at 2200Z on 17 Oct 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 M2 event observed at
17/0505Z from Region 3852 (S15W65). There are currently 8 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 Oct, 19 Oct, 20 Oct).
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 481 km/s at 17/0003Z. Total IMF reached 7
nT at 17/0144Z. The maximum southward component of Bz reached -6 nT at
17/0132Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 456 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one, two, and three (18 Oct, 19
Oct, 20 Oct). Protons have a slight chance of crossing threshold on days
one, two, and three (18 Oct, 19 Oct, 20 Oct).
III. Event Probabilities 18 Oct to 20 Oct
| Class M | 60% | 60% | 55% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Oct 174 Predicted 18 Oct-20 Oct 170/160/165 90 Day Mean 17 Oct 221
V. Geomagnetic A Indices
Observed Afr/Ap 16 Oct 011/014 Estimated Afr/Ap 17 Oct 008/008 Predicted Afr/Ap 18 Oct-20 Oct 012/015-014/018-011/012
VI. Geomagnetic Activity Probabilities 18 Oct to 20 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 25% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 40% | 40% | 30% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/10/09 | X1.4 |
| Last M-flare | 2024/10/17 | M2.4 |
| 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 |
| October 2024 | 154.5 +13.1 |
| Last 30 days | 150 -11.5 |