Viewing archive of Thursday, 25 February 1999
Geophysical 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.
Solar and Geophysical Activity Summary 1999 Feb 25 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 056 Issued at 0245Z on 25 FEB 1999 This report is compiled from data received at SWO on 24 FEBA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0151 0000 0206 II
B. Proton Events
None
C. Geomagnetic Activity Summary
QUIET TO ACTIVE
D. Stratwarm
STRATWARM ALERT/WEDNESDAY/STRATWARM EXISTS.
AN INTENSE WARMING,CENTERED OVER THE SIBERIAN ARCTIC,COVERS
THE WHOLE POLAR REGION,NORTHERN SIBERIA,ALASKA AND WESTERN
CANADA AT 10HPA.THE COLD CENTRE SOUTH OF ICELAND WEAKENING.
MEAN ZONAL WIND AT 60N WEAKENING IN THE LOWER AND MIDDLE
STRATOSPHERE AND REACHED EASTERLY DIRECTION AT 1HPA.TEMPERA-
TURE GRADIENT REVERSED BETWEEN 60N AND THE POLE AT 30HPA
AND ABOVE IN THE MIDDLE AND UPPER STRATOSPHERE.
FINAL WARMING IN PROGRESS.
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 120 SSN 056 AFR/AP 006/011 X-RAY BACKGROUND B2.4 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 1.0E+06 GT 10 MEV 1.6E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 3.10E+07 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 1 2 3 3 3 3 2 2 PLANETARY 0 2 3 4 4 3 2 0
F. Comments
None
All times in UTC
Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future
Gillam, MB, Iqaluit, NUNuuk
Tórshavn
Reykjavik
Latest news
Friday, 28 March 2025
X1.1 solar flare
Monday, 24 March 2025
Coronal hole faces Earth
Saturday, 22 March 2025
Strong G3 geomagnetic storm watch for 23 March
Latest forum messages
Unexplained proton activity 57Unspecified geomagnetic activity 2192AR4048 110SolarMax and FRAM2 2Changelog/Featurelog 169
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!
Latest alerts
00:15 UTC - Geomagnetic activity
Minor G1 geomagnetic storm (Kp5) Threshold Reached: 23:59 UTC
Thursday, 3 April 2025
20:15 UTC - Geomagnetic activity
Minor G1 geomagnetic storm (Kp5) Threshold Reached: 20:02 UTC
13:03 UTC - Hemispheric Power Index
The OVATION model predicts the Hemispheric Power Index to reach 50GW at 13:56 UTC
Wednesday, 2 April 2025
04:03 UTC - Hemispheric Power Index
The OVATION model predicts the Hemispheric Power Index to reach 50GW at 04:56 UTC
Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/01 | M2.5 |
| Last geomagnetic storm | 2025/03/27 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2025 | 154.6 +17.6 |
| April 2025 | 152.5 -2.1 |
| Last 30 days | 130.6 -15.9 |