Viewing archive of Saturday, 31 March 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 Mar 31 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 090 Issued at 0245Z on 31 Mar 2001 This report is compiled from data received at SWO on 30 MarA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0425 0430 0440 9393 N13W25 Sf 3700 0511 0515 0520 9393 N14W24 M2.2 1n 1800 91 1522 1528 1548 9397 S08W04 C4.9 Sf 370 1559 0000 1605 II 1620 0000 1626 II 1839 1839 1844 950
B. Proton Events
None
C. Geomagnetic Activity Summary
Activity in the geomagnetic field
has been unsettled the past 24 hours. Some discontinuity was
observed at the ACE spacecraft and at Earth between 30/1800 UTC and
30/1900 UTC. The event appeared to be small and is likely the
result of solar activity prior to 29 March.
The small proton event that began at 29/1000 UTC reached a maximum
flux of 35 pfu in the >10 MeV GOES detector and remains above 10 pfu
today.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 257 SSN 349 Afr/Ap 008/010 X-ray Background C3.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.7e+07 GT 10 MeV 2.1e+06 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 5.20e+06 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 2 2 2 3 4 3 2 3 Planetary 1 2 2 3 3 3 3 3
F. Comments
None
All times in UTC
Latest news
Sunday, 1 February 2026
Complex sunspot region 4366
Monday, 19 January 2026
CME impact! S4 solar radiation storm
Sunday, 18 January 2026
X1.9 solar flare with earth-directed CME
Latest forum messages
Comet C/2026 A1 (MAPS) for the southern hemisphere 12Available resources & tools / space weather databases 11JHelioviewer Tips and Settings 45AR4387 / AR4389 / AR4391 7Unspecified geomagnetic activity 93
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 | 2026/02/04 | X4.21 |
| Last M-flare | 2026/02/25 | M2.4 |
| Last geomagnetic storm | 2026/03/03 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (4%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| March 2026 | 74.4 -3.8 |
| Last 30 days | 52.8 -75.1 |