Viewing archive of Saturday, 13 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 13 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 072 Issued at 0245Z on 13 MAR 1999 This report is compiled from data received at SWO on 12 MARA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0223 0223 0223 290 0646 0651 0653 8487 N15E59 C2.3 SF 920 0747 0747 0748 190 0755 0758 0801 C2.6 260 0853 0856 0904 8487 N15E57 C1.0 SN 180 1017 1017 1017 1000 13 1235 1237 1241 8487 N14E57 SF 200 1720 1726 1732 8487 N14E55 C9.4 1B 190 1934 1934 1935 140 2033 2038 2040 8487 N13E52 C3.2 1B 1500 13
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS QUIET TO
UNSETTLED WITH ACTIVE CONDITIONS AT 12/1200Z.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 140 SSN 098 AFR/AP 012/010 X-RAY BACKGROUND B5.0 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 1.7E+05 GT 10 MEV 1.4E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 2.70E+06 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 1 2 3 4 2 2 2 2 PLANETARY 1 2 3 4 3 2 3 2
F. Comments
None
All times in UTC
Latest news
Sunday, 7 December 2025
M8.1 solar flare with earth-directed CME
Monday, 1 December 2025
X1.9 solar flare, Coronal hole faces Earth
Friday, 14 November 2025
X4.0 solar flare
Latest forum messages
AR4299 M8.1 CME 2025/12/06 114AR4294 / 4296 / 4298 402AR 4299 117New paper on the Gannon Storm 10-11 May 2024 2Electron event 10
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 | 2025/12/08 | M1.1 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 162.7 +70.9 |
| Last 30 days | 108 +13.3 |