Viewing archive of Wednesday, 4 January 2017
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2017 Jan 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 4 Issued at 2200Z on 04 Jan 2017IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z 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 (05 Jan, 06 Jan, 07 Jan).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 567 km/s at 04/1143Z. Total IMF reached 15
nT at 04/0444Z. The maximum southward component of Bz reached -6 nT at
04/1913Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 274 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (05 Jan) and
unsettled to active levels on days two and three (06 Jan, 07 Jan).
III. Event Probabilities 05 Jan to 07 Jan
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 Jan 072 Predicted 05 Jan-07 Jan 072/071/071 90 Day Mean 04 Jan 079
V. Geomagnetic A Indices
Observed Afr/Ap 03 Jan 008/009 Estimated Afr/Ap 04 Jan 010/016 Predicted Afr/Ap 05 Jan-07 Jan 018/025-013/018-012/015
VI. Geomagnetic Activity Probabilities 05 Jan to 07 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 30% |
| Minor storm | 25% | 20% | 10% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 25% | 25% | 30% |
| Major-severe storm | 65% | 50% | 40% |
All times in UTC
Latest news
Monday, 11 November 2024
Coronal hole faces Earth
Friday, 1 November 2024
X2.0 solar flare
Wednesday, 9 October 2024
X1.8 solar flare, severe geomagnetic storm watch
Latest forum messages
Unspecified geomagnetic activity 1658Ask your obscure/"stupid" space weather questions. 58AR13893 2AR13889 144Cactus Discrepancies? Latest SOHO/LASCO images show a different story 12
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Space weather facts
| Last X-flare | 2024/11/06 | X2.39 |
| Last M-flare | 2024/11/15 | 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 | 161 -5.4 |
| Last 30 days | 161.7 +14.5 |