Viewing archive of Saturday, 31 July 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 Jul 31 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 212 Issued at 0245Z on 31 JUL 1999 This report is compiled from data received at SWO on 30 JULA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0716 0720 0724 8651 N25E46 C3.9 SF 110 1509 1520 1526 8649 S15W28 M1.7 1B 1200 56
B. Proton Events
None.
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS QUIET TO
UNSETTLED UNTIL NEAR 30/0900Z. THEREAFTER, THE FIELD WAS AT
GENERALLY ACTIVE TO MAJOR STORM LEVELS. SOME SEVERE STORMING WAS
OBSERVED AT HIGH LATITUDES. A SUDDEN STORM COMMENCEMENT OF 89 NT WAS
OBSERVED AT 30/1948Z.
D. Stratwarm
None.
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 206 SSN 218 AFR/AP 036/036 X-RAY BACKGROUND C1.7 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 7.7E+05 GT 10 MEV 1.5E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 7.50E+05 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 2 2 3 4 5 4 6 6 PLANETARY 3 2 3 4 5 4 6 6
F. Comments
None.
All times in UTC
Latest news
Monday, 11 November 2024
Coronal hole faces Earth
Friday, 1 November 2024
X2.0 solar flare
Wednesday, 9 October 2024
X1.8 solar flare, severe geomagnetic storm watch
Latest forum messages
Filaments and prominences 472Unspecified geomagnetic activity 1657Ask your obscure/"stupid" space weather questions. 51iOS missing family sharing for in-app purchases 7Incoming & Unnumbered Active Regions 1212
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 | 2024/11/06 | X2.39 |
| Last M-flare | 2024/11/13 | M1.7 |
| Last geomagnetic storm | 2024/11/10 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| October 2024 | 166.4 +25 |
| November 2024 | 166 -0.4 |
| Last 30 days | 163.2 +18.4 |