Viewing archive of Wednesday, 28 January 2004
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 2004 Jan 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 028 Issued at 2200Z on 28 Jan 2004IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z Solar activity was very low. There were no flares in
the past 24 hours. The solar disk was devoid of spots for most of
the day, but towards the end of the period there was evidence for a
new active region (or regions) rotating on the disk at latitudes
S10-S15, near the location where old Region 536 would be expected.
IB. Solar Activity Forecast
Solar activity is expected to be very
low. There should be a slow rise in background levels as the new
active region (or regions) rotate into view.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic field ranged from unsettled to minor storm levels.
Solar wind velocity showed a gradual increase beginning around 0100
UTC, and this was accompanied by frequent fluctuations in the
interplanetary Bz component in the range of about -7 nT to +7 nT.
These signatures together with a consistent 'away' polarity in the
solar phi angle all suggest that the activity was driven by
favorably positioned positive polarity coronal hole. The greater
than 2 MeV electron fluxes were at high levels during the past 24
hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be unsettled with occasional active periods for the next
two days (29-30 January). An increase to unsettled to active is
expected on the third day (31 January) as another coronal hole
rotates into favorable position.
III. Event Probabilities 29 Jan to 31 Jan
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Jan 089 Predicted 29 Jan-31 Jan 100/105/105 90 Day Mean 28 Jan 126
V. Geomagnetic A Indices
Observed Afr/Ap 27 Jan 013/016 Estimated Afr/Ap 28 Jan 015/019 Predicted Afr/Ap 29 Jan-31 Jan 010/015-010/015-010/020
VI. Geomagnetic Activity Probabilities 29 Jan to 31 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 05% | 05% | 05% |
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
sun goes blank 42AR13889 135AR13883 2024/11/04 CME 43Incoming & Unnumbered Active Regions 1204AR 3878 176
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 | 2024/11/11 | M1.3 |
| 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 | 175.7 +9.3 |
| Last 30 days | 166.1 +21.7 |