Viewing archive of Sunday, 18 November 2001
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 2001 Nov 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 322 Issued at 2200Z on 18 Nov 2001IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z Solar activity was low. Region 9704 (S18E16) continued
to produce C-class subflares, the largest being a C7/Sn at 18/0919
UTC. This region has changed little since yesterday, maintaining
moderate magnetic complexity. Region 9697 (N12W19) also produced
subflares but none were associated with significant x-ray output.
New Region 9710 (S10E46) was numbered.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. Region 9704 is the most likely candidate for M-class
activity.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled becoming unsettled to active by 20
November. This increased activity is anticipated in response to a
CME associated with the M2/1n flare which occurred on 17 November.
III. Event Probabilities 19 Nov to 21 Nov
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Nov 188 Predicted 19 Nov-21 Nov 185/180/175 90 Day Mean 18 Nov 217
V. Geomagnetic A Indices
Observed Afr/Ap 17 Nov 009/011 Estimated Afr/Ap 18 Nov 010/010 Predicted Afr/Ap 19 Nov-21 Nov 010/010-015/015-015/012
VI. Geomagnetic Activity Probabilities 19 Nov to 21 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
Latest news
Thursday, 21 November 2024
Major far side eruption, S1 radiation storm
Monday, 11 November 2024
Coronal hole faces Earth
Friday, 1 November 2024
X2.0 solar flare
Latest forum messages
Strong far side CME 224Filaments and prominences 527AR 13901 110AR 13903 1Incoming & Unnumbered Active Regions 1246
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 | 2024/11/20 | 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 | 142.7 -23.8 |
| Last 30 days | 156.1 +4.7 |