Viewing archive of Wednesday, 20 December 2000
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 2000 Dec 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 355 Issued at 2200Z on 20 Dec 2000IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z
Solar activity remained at low levels. Regions 9272
(N14W59), 9278 (N09E23), and 9279 (S13E41) each produced isolated,
low-level C-class subflares. No significant changes were observed in
any of the sunspot groups. Region 9280 (N08E61), which was stable
during the period, may possess a moderate degree of magnetic
complexity (beta-gamma structure), but analysis was difficult due to
limb proximity. New Region 9281 (N07E39) was numbered.
IB. Solar Activity Forecast
Solar activity is expected to be
mostly low with a slight chance for an isolated M-class flare from
Regions 9278 or 9280.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
Geomagnetic field activity has been at quiet levels.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to increase to unsettled to active levels during the first
two days of the period due to an expected CME passage. Quiet to
unsettled levels are expected on the final day.
III. Event Probabilities 21 Dec to 23 Dec
| Class M | 35% | 35% | 35% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Dec 201 Predicted 21 Dec-23 Dec 200/195/195 90 Day Mean 20 Dec 176
V. Geomagnetic A Indices
Observed Afr/Ap 19 Dec 002/005 Estimated Afr/Ap 20 Dec 004/007 Predicted Afr/Ap 21 Dec-23 Dec 015/020-020/025-012/015
VI. Geomagnetic Activity Probabilities 21 Dec to 23 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 35% | 20% |
| Minor storm | 15% | 20% | 10% |
| Major-severe storm | 10% | 10% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 35% | 25% |
| Minor storm | 20% | 25% | 15% |
| Major-severe storm | 15% | 15% | 01% |
All times in UTC
Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future
Gillam, MB, Iqaluit, NU, Yellowknife, NTNuuk
Latest news
Friday, 28 March 2025
X1.1 solar flare
Monday, 24 March 2025
Coronal hole faces Earth
Saturday, 22 March 2025
Strong G3 geomagnetic storm watch for 23 March
Latest forum messages
AR4046 98Aurora photography hints for those of us with smartphones 48Large Coronal Hole 25 178Incoming & Unnumbered Active Regions 1655LASCO Data Not Updating 5
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!
Latest alerts
00:00 UTC - Solar flare
Moderate M1.79 flare
Friday, 28 March 2025
23:36 UTC - Radio Blackout
Minor R1 radio blackout in progress (≥M1 - current: M1.04)
21:24 UTC - Hemispheric Power Index
The OVATION model predicts the Hemispheric Power Index to reach 51GW at 21:59 UTC
19:45 UTC - Solar flare
Moderate M1.16 flare
19:27 UTC - Radio Blackout
Minor R1 radio blackout in progress (≥M1 - current: M1.1)
Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/03/28 | M1.7 |
| Last geomagnetic storm | 2025/03/27 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2025 | 154.6 +17.6 |
| March 2025 | 130 -24.6 |
| Last 30 days | 130 -21.9 |