Viewing archive of Thursday, 4 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 04 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 063 Issued at 0245Z on 04 MAR 1999 This report is compiled from data received at SWO on 03 MARA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 1204 1212 1220 8475 N31E11 C6.3 SN 150 44
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS
PREDOMINANTLY QUIET TO UNSETTLED. THE PLANETARY K-INDEX REACHED
ACTIVE LEVEL IN THE 03/1500-1800Z INTERVAL. SOLAR WIND VELOCITY
DECREASED APPROXIMATELY 100 KM/S DURING THE PERIOD AND BZ WAS
NORTHWARD FOR ALMOST ALL THE PERIOD. ENERGETIC ELECTRON FLUXES AT
GEOSYNCHRONOUS ORBIT BECAME MODERATE.
D. Stratwarm
STRATWARM ALERT/WEDNESDAY/STRATWARM EXISTS.
FINAL WARMING CONTINUES.
TEMPERATURE GRADIENT REVERSED BETWEEN 60N AND THE POLE
THROUGHOUT THE STRATOSPHERE.MEAN ZONAL WIND AT 60N CON-
TINUOUSLY WEAKENING IN THE LOWER STRATOSPHERE AND HAS
REACHED EASTERLY DIRECTION IN THE MIDDLE AND UPPER STRA-
TOSPHERE.
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 137 SSN 148 AFR/AP 011/015 X-RAY BACKGROUND B4.1 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 1.1E+05 GT 10 MEV 1.6E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 7.20E+06 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 1 3 2 3 2 2 3 3 PLANETARY 2 3 3 3 3 4 4 3
F. Comments
None
Latest news
Saturday, 4 May 2024
Sunspot region 3663, X1 solar flare
Monday, 22 April 2024
Lot's of sunspots! Big chance for major flare activity?
Saturday, 23 March 2024
X1.1 solar flare with earth-directed CME
Latest forum messages
Weakening of Earths magnetic field due to geomagnetic excursion 6Does anyone know what happened to solarham.net? 10AR3663 92AR3666 Beta-Gamma-Delta 7Sporadic E and Flare activity 18
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 | 2024/05/03 | X1.6 |
| Last M-flare | 2024/05/04 | M1.5 |
| Last geomagnetic storm | 2024/05/02 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2024 | 136.5 +31.6 |
| Last 30 days | 151.9 +56.5 |