Viewing archive of Tuesday, 29 September 2020
Solar activity report
Report of Solar-Geophysical Activity 2020 Sep 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 273 Issued at 2200Z on 29 Sep 2020IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 0 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (30 Sep, 01 Oct, 02 Oct).
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 678 km/s at 29/0012Z. Total IMF
reached 7 nT at 28/2101Z. The maximum southward component of Bz reached
-6 nT at 28/2353Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 13675 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (30 Sep), quiet to
active levels on day two (01 Oct) and quiet to unsettled levels on day
three (02 Oct).
III. Event Probabilities 30 Sep to 02 Oct
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Sep 073 Predicted 30 Sep-02 Oct 074/074/074 90 Day Mean 29 Sep 071
V. Geomagnetic A Indices
Observed Afr/Ap 28 Sep 021/031 Estimated Afr/Ap 29 Sep 028/038 Predicted Afr/Ap 30 Sep-02 Oct 021/020-013/015-011/010
VI. Geomagnetic Activity Probabilities 30 Sep to 02 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 30% | 10% |
| Minor storm | 30% | 15% | 01% |
| Major-severe storm | 10% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 15% | 20% |
| Minor storm | 20% | 30% | 20% |
| Major-severe storm | 75% | 45% | 10% |
All times in UTC
Latest news
Monday, 1 December 2025
X1.9 solar flare, Coronal hole faces Earth
Friday, 14 November 2025
X4.0 solar flare
Tuesday, 11 November 2025
X5.1 solar flare, G4 geomagnetic storm watch
Latest forum messages
Incoming & Unnumbered Active Regions 14AR4294 / 4296 / 4298 31050 mhz F2 75AR 4299 24Current Farside Activity 236
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Solar activity or if there is a chance to see the aurora, but with more traffic comes higher costs to keep the servers online. If you like SpaceWeatherLive and want to support the project you can choose a subscription for an ad-free site or consider a donation. With your help we can keep SpaceWeatherLive online!
Space weather facts
| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/04 | M6.0 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 186 +94.2 |
| Last 30 days | 106.3 +12.6 |