Viewing archive of Monday, 15 November 1999
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 1999 Nov 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 319 Issued at 2200Z on 15 NOV 1999IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 8765 (S13E19)
PRODUCED AN M2/2N FLARE AT 15/0841Z. SEVERAL C-CLASS EVENTS WERE
ALSO OBSERVED THIS PERIOD. REGION 8765 REMAINS THE LARGEST REGION ON
THE SOLAR DISK WITH AN AREA OF 820 MILLIONTHS. THIS REGION HAS
STRONG MIXED POLARITIES WITH A POSSIBLE DELTA CONFIGURATION. ANOTHER
REGION OF NOTE IS REGION 8766 (N17E44) WHICH DOES DISPLAY A DELTA
CONFIGURATION WITHIN THE GROUP. A 24 DEGREE FILAMENT AT N44E32
DISAPPEARED BETWEEN 14/1845-2115Z. A NEW REGION WAS NUMBERED TODAY
AS REGION 8769 (S10E76).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE
MODERATE. SEVERAL REGIONS HAVE M-CLASS FLARE POTENTIAL WITH THE
CHANCE FOR AN ISOLATED X-CLASS EVENT.
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE FORECAST PERIOD.
III. Event Probabilities 16 NOV to 18 NOV
| Class M | 90% | 90% | 90% |
| Class X | 40% | 40% | 40% |
| Proton | 10% | 10% | 10% |
| PCAF | YELLOW | ||
IV. Penticton 10.7 cm Flux
Observed 15 NOV 206 Predicted 16 NOV-18 NOV 200/195/190 90 Day Mean 15 NOV 163
V. Geomagnetic A Indices
OBSERVED AFR/AP 14 NOV 013/010 ESTIMATED AFR/AP 15 NOV 008/010 PREDICTED AFR/AP 16 NOV-18 NOV 010/010-010/010-010/015
VI. Geomagnetic Activity Probabilities 16 NOV to 18 NOV
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 35% |
| Minor storm | 15% | 15% | 20% |
| Major-severe storm | 05% | 05% | 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
AR4294 / 4296 / 4298 314AR 4299 25Incoming & Unnumbered Active Regions 1650 mhz F2 75Current 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 | 175.4 +83.6 |
| Last 30 days | 107.3 +14.6 |