Viewing archive of Tuesday, 15 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 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 349 Issued at 2200Z on 15 DEC 1998IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z SOLAR ACTIVITY WAS LOW. ONLY C-CLASS X-RAY EVENTS
OCCURRED DURING THE PERIOD. REGION 8408 (S18W40) AND REGION 8409
(S28W25) PRODUCED SEVERAL SUBFLARES. REGION 8408 HAS SHOWN SOME
SLOW DECAY SINCE YESTERDAY, AND IS NOW A DAO BETA GROUP WITH ELEVEN
SPOTS. ONE NEW REGION WAS NUMBERED, 8413 (N18E13), AND IS CURRENTLY
A BXO BETA SPOT GROUP WITH TWO SPOTS.
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 FROM EITHER REGION 8408 OR 8409.
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.
III. Event Probabilities 16 DEC to 18 DEC
| Class M | 30% | 30% | 30% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 15 DEC 142 Predicted 16 DEC-18 DEC 140/135/132 90 Day Mean 15 DEC 132
V. Geomagnetic A Indices
OBSERVED AFR/AP 14 DEC 005/004 ESTIMATED AFR/AP 15 DEC 004/004 PREDICTED AFR/AP 16 DEC-18 DEC 008/008-010/010-010/010
VI. Geomagnetic Activity Probabilities 16 DEC to 18 DEC
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
Latest news
Sunday, 8 December 2024
X2.2 solar flare, SDO outage
Thursday, 21 November 2024
Major far side eruption, S1 radiation storm
Monday, 11 November 2024
Coronal hole faces Earth
Latest forum messages
AR 13932 31Unspecified geomagnetic activity 1752Incoming & Unnumbered Active Regions 1364Ask your obscure/"stupid" space weather questions. 114Strong far side CME 340
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 | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/23 | M8.9 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2024 | 152.5 -13.9 |
| December 2024 | 106.6 -45.9 |
| Last 30 days | 116.1 -41.8 |