Viewing archive of Friday, 5 March 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 Mar 05 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 064 Issued at 0245Z on 05 MAR 1999 This report is compiled from data received at SWO on 04 MARA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 1926 1931 1937 C1.4 500
B. Proton Events
None.
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD RANGED FROM
QUIET TO MINOR STORM LEVELS. THE PLANETARY K-INDEX REACHED MINOR
STORM LEVELS IN THE 04/0600-0900Z INTERVAL. SOLAR WIND VELOCITY
STEADILY ROSE FROM APPROXIMATELY 380 TO 600 KM/S DURING THE PERIOD.
DENSITY REMAINED LOW, INDICATING THE AFFECTS OF A CORONAL HOLE
STREAM IMPACTING THE EARTH. ENERGETIC ELECTRON FLUXES AT
GEOSYNCHRONOUS ORBIT REACHED HIGH LEVELS FROM APPROXIMATELY 04/1920
- 2030Z, AND WERE PREDOMINANTLY MODERATE.
D. Stratwarm
STRATWARM ALERT/THURSDAY/STRATWARM EXISTS.
FINAL WARMING CONTINUES.
TEMPERATURE GRADIENT REVERSED BETWEEN 60N AND THE POLE IN
THE LOWER AND MIDDLE STRATOSPHERE.MEAN ZONAL WIND AT 60N
CONTINUOUSLY WEAKENING IN THE LOWER STRATOSPHERE AND HAS
REACHED EASTERLY DIRECTION AT 30 HPA AND ABOVE IN THE MIDDLE
AND UPPER STRATOSPHERE.
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 144 SSN 144 AFR/AP 020/023 X-RAY BACKGROUND B4.3 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 3.2E+05 GT 10 MEV 1.5E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 2.90E+07 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 2 4 4 3 3 3 4 2 PLANETARY 3 4 5 4 4 4 4 3
F. Comments
None.
All times in UTC
Latest news
Wednesday, 31 December 2025
Happy New Year! Celebrate with an M7.1 solar flare!
Sunday, 7 December 2025
M8.1 solar flare with earth-directed CME
Monday, 1 December 2025
X1.9 solar flare, Coronal hole faces Earth
Latest forum messages
AR 4325 21Geminid Meteor Shower 34Incoming & Unnumbered Active Regions 77AR14324 74Happy new year 14
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 | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/31 | M7.2 |
| Last geomagnetic storm | 2025/12/22 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| January 2026 | 120 +28.2 |
| Last 30 days | 114.5 +16.4 |