Viewing archive of Monday, 13 August 2001
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 2001 Aug 13 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 225 Issued at 0245Z on 13 Aug 2001 This report is compiled from data received at SWO on 12 AugA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0330 0330 0331 510 0507 0508 0508 280 0734 0734 0735 190 1237 1237 1237 220 1857 1857 1900 620
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to
minor storm conditions.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 160 SSN 196 Afr/Ap 015/014 X-ray Background B6.9 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 9.5e+06 GT 10 MeV 1.6e+04 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 4.60e+06 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 2 2 2 3 2 5 4 3 Planetary 2 2 2 3 3 4 3 4
F. Comments
A shock passed the ACE spacecraft at 12/1050 UTC and created a sudden impulse at Earth of 23 nt at 12/1136 UTC. Solar wind velocity increased from 336 km/s to 406 km/s and density jumped from 6 p/cc to 35 p/cc.
All times in UTC
Latest news
Monday, 19 January 2026
CME impact! S4 solar radiation storm
Sunday, 18 January 2026
X1.9 solar flare with earth-directed CME
Wednesday, 31 December 2025
Happy New Year! Celebrate with an M7.1 solar flare!
Latest forum messages
AR4366 36Incoming & Unnumbered Active Regions 139X1.9 CME 1342Broad-spectrum aurora pillars 47CH 17 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 | 2026/01/18 | X1.9 |
| Last M-flare | 2026/01/21 | M3.4 |
| Last geomagnetic storm | 2026/01/28 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| Last 30 days | 118.9 +2.4 |