Viewing archive of Sunday, 28 February 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 Feb 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 059 Issued at 2200Z on 28 FEB 1999IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z SOLAR ACTIVITY WAS HIGH. REGION 8471 (N29W12) PRODUCED
A M6/2B EVENT AT 28/1639Z. THIS EVENT WAS ASSOCIATED WITH A 310 SFU
RADIO BURST AT 2695MHZ. OTHERWISE, ONLY TWO MINOR C-CLASS X-RAY
EVENTS OCCURRED DURING THE PERIOD. REGION 8471 CONTINUED TO SHOW
GROWTH AND HAS INCREASED IN MAGNETIC COMPLEXITY TO A BETA GAMMA
CONFIGURATION. NEW REGIONS 8476 AT N20E19, AND 8477 AT S25E77 WERE
NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE WITH REGION 8471 AS THE PRIMARY FLARE PRODUCER.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED WITH ACTIVE CONDITIONS
DETECTED AT HIGHER LATITUDES.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO ACTIVE. A HIGH-SPEED STREAM FROM A WELL
POSITIONED CORONAL HOLE IN THE SOLAR SOUTHERN HEMISPHERE MAY AFFECT
THE NEAR-EARTH ENVIRONS DURING THE PERIOD.
III. Event Probabilities 01 MAR to 03 MAR
| Class M | 20% | 20% | 20% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 28 FEB 123 Predicted 01 MAR-03 MAR 125/128/130 90 Day Mean 28 FEB 144
V. Geomagnetic A Indices
OBSERVED AFR/AP 27 FEB 004/005 ESTIMATED AFR/AP 28 FEB 008/008 PREDICTED AFR/AP 01 MAR-03 MAR 010/010-010/012-012/012
VI. Geomagnetic Activity Probabilities 01 MAR to 03 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 25% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
Latest news
Monday, 23 December 2024
M9.0 solar flare with earth-directed CME
Sunday, 8 December 2024
X2.2 solar flare, SDO outage
Thursday, 21 November 2024
Major far side eruption, S1 radiation storm
Latest forum messages
jsoc 72AR 13932 732024/12/23 AR13932 M8.9 & M4.1 associated CMEs 11Ask your obscure/"stupid" space weather questions. 122Changelog/Featurelog 163
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 | 2024/12/24 | M1.0 |
| 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 | 110.7 -41.8 |
| Last 30 days | 116.5 -41.7 |