Viewing archive of Friday, 16 March 2001
Solar activity 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.
Report of Solar-Geophysical Activity 2001 Mar 16 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 075 Issued at 2200Z on 16 Mar 2001IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z Solar activity was low. Region 9373 (S07W20) generated
several small C-class flares. The largest of these was a C5/SN at
16/1041 UTC. Region 9384 (N11W23) also produced a number of small
C-class subflares. Both Regions exhibited flare-bright plage
fluctuations throughout the day. A full halo CME was reported by the
SOHO LASCO team as being first observed in the LASCO C2 instrument
at 16/0350 UTC. Timing of the event suggests that it is most likely
associated with an eruptive filament between Regions 9373 and 9384.
Small C-class flares also occurred in these Regions during this time
period.
IB. Solar Activity Forecast
Solar activity is expected to be low.
Additional C-class flares are possible in Regions 9373 and 9384.
Both Regions are also capable of a low-level M-class flare.
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled. Increased activity levels are
possible at the end of the three-day forecast period in response to
the CME discussed in Part IA.
III. Event Probabilities 17 Mar to 19 Mar
| Class M | 30% | 30% | 30% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 16 Mar 140 Predicted 17 Mar-19 Mar 135/130/130 90 Day Mean 16 Mar 161
V. Geomagnetic A Indices
Observed Afr/Ap 15 Mar 002/003 Estimated Afr/Ap 16 Mar 003/004 Predicted Afr/Ap 17 Mar-19 Mar 005/005-015/015-015/020
VI. Geomagnetic Activity Probabilities 17 Mar to 19 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 25% |
| Minor storm | 05% | 10% | 15% |
| Major-severe storm | 01% | 01% | 20% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 25% |
| Minor storm | 05% | 10% | 15% |
| Major-severe storm | 01% | 01% | 02% |
All times in UTC
Latest news
Monday, 1 December 2025
X1.9 solar flare, Coronal hole faces Earth
Friday, 14 November 2025
X4.0 solar flare
Tuesday, 11 November 2025
X5.1 solar flare, G4 geomagnetic storm watch
Latest forum messages
AR4294 / 4296 / 4298 300AR 4299 24Current Farside Activity 236Unspecified geomagnetic activity 40Space Weather Memes 760
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 | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/04 | M6.0 |
| 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 | 186 +94.2 |
| Last 30 days | 106.3 +12.6 |