Viewing archive of Wednesday, 4 March 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 Mar 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 063 Issued at 2200Z on 04 MAR 1998IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z SOLAR ACTIVITY WAS LOW. REGION 8171 (S24W62) APPEARS TO
BE MATURING AS A MODERATELY-SIZED E-TYPE SUNSPOT GROUP WITHOUT
APPRECIABLE MAGNETIC COMPLEXITY. THE REGION CONTINUES TO PRODUCE
SMALL C-CLASS FLARES, THE LARGEST OF WHICH WAS A C2/SF AT 04/0719Z.
A PARTIAL-HALO CME WAS OBSERVED IN THE LASCO CORONOGRAPH AT ABOUT
03/0900Z. REGION 8172 (N22W35) IS GROWING SLOWLY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
C-CLASS ACTIVITY SHOULD CONTINUE IN REGION 8171.
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. THE GREATER THAN 2 MEV
ELECTRON FLUX AT GEOSYNCHRONOUS ATLTITUDE WAS MODERATE.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 05 MAR to 07 MAR
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 04 MAR 102 Predicted 05 MAR-07 MAR 098/096/094 90 Day Mean 04 MAR 095
V. Geomagnetic A Indices
OBSERVED AFR/AP 03 MAR 003/004 ESTIMATED AFR/AP 04 MAR 010/008 PREDICTED AFR/AP 05 MAR-07 MAR 010/012-005/008-010/010
VI. Geomagnetic Activity Probabilities 05 MAR to 07 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
Latest news
Monday, 30 March 2026
X1.5 solar flare
Tuesday, 17 March 2026
M2.7 solar flare, CME arrival possible
Sunday, 1 February 2026
Complex sunspot region 4366
Latest forum messages
X1.5 CME (2026-03-30) 235AR4405 106Space Weather Memes 808Space Weather Watch App 6Comet C/2026 A1 (MAPS) for the southern hemisphere 26
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 | 2026/03/30 | X1.4 |
| Last M-flare | 2026/03/28 | M1.3 |
| Last geomagnetic storm | 2026/03/25 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| Last 30 days | 88.6 +15.4 |
This day in history*
Aurora on this day in history
No observations submitted for this day in history. If you've observed the aurora and you have some amazing photos to show off, submit your observations now!
Submit your aurora observation