Viewing archive of Saturday, 12 December 1998
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 1998 Dec 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 346 Issued at 2200Z on 12 DEC 1998IA. Analysis of Solar Active Regions and Activity from 11-2100Z to 12-2100Z SOLAR ACTIVITY WAS LOW. ONLY MINOR C-CLASS X-RAY EVENTS
OCCURRED DURING THIS PERIOD. THE MOST ACTIVE REGIONS WERE 8404
(S22W77), 8408 (S18E01), AND 8409 (S29E13). ALL OF WHICH PRODUCED
MINOR C-CLASS X-RAYS EVENTS AND OPTICAL SUBFLARES. REGION 8408 HAS
GROWN SIGNIFICANTLY SINCE YESTERDAY. CURRENTLY IT IS A 19 SPOT DSO
BETA-GAMMA GROUP. REGION 8411 HAS ALSO SHOWN AN INCREASE IN SIZE AND
NUMBER OF SPOTS, CURRENTLY A 5 SPOT CSO BETA GROUP.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
LOW WITH CONTINUED C-CLASS EVENTS. THERE IS A SLIGHT CHANCE OF AN
ISOLATED M-CLASS EVENT.
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
THE GEOMAGNETIC FILED WAS UNSETTLED EARLY IN THE PERIOD AND HAS SINCE
BEEN QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 13 DEC to 15 DEC
| Class M | 30% | 30% | 30% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 12 DEC 143 Predicted 13 DEC-15 DEC 140/140/140 90 Day Mean 12 DEC 131
V. Geomagnetic A Indices
OBSERVED AFR/AP 11 DEC 019/030 ESTIMATED AFR/AP 12 DEC 010/014 PREDICTED AFR/AP 13 DEC-15 DEC 010/010-010/008-010/008
VI. Geomagnetic Activity Probabilities 13 DEC to 15 DEC
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
Latest news
Saturday, 23 March 2024
X1.1 solar flare with earth-directed CME
Wednesday, 20 March 2024
Sunspot region 3615, G1 watch
Thursday, 22 February 2024
X6.3 solar flare
Latest forum messages
C5.6 12/04/2024 CME 33AR3639 13AR 3637, 3638, 3643 29Space Weather Memes 333Where to find data for current polarity on the northern hemisphere of the sun? 27
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 | 2024/03/28 | X1.1 |
| Last M-flare | 2024/04/16 | M1.1 |
| Last geomagnetic storm | 2024/03/25 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2024 | 104.9 -19.8 |