Viewing archive of Saturday, 16 March 2002
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 2002 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 2002IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z Solar activity was moderate. Region 9866 (S09W19)
produced an M2/1F flare at 15/2310 UTC. The event had an associated
tenflare (190 sfu), type IV radio sweep, and an enhancement in the
greater than 10 MeV proton flux.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. Region 9866 is the most likely candidate for M-class
flares.
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 become active by 18 March due to the flare/CME mentioned
in Part IA.
III. Event Probabilities 17 Mar to 19 Mar
| Class M | 60% | 50% | 50% |
| Class X | 10% | 05% | 05% |
| Proton | 05% | 01% | 01% |
| PCAF | yellow | ||
IV. Penticton 10.7 cm Flux
Observed 16 Mar 185 Predicted 17 Mar-19 Mar 180/180/180 90 Day Mean 16 Mar 215
V. Geomagnetic A Indices
Observed Afr/Ap 15 Mar 003/006 Estimated Afr/Ap 16 Mar 005/006 Predicted Afr/Ap 17 Mar-19 Mar 005/008-020/020-020/030
VI. Geomagnetic Activity Probabilities 17 Mar to 19 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 11% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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
Broad-spectrum aurora pillars 32Incoming & Unnumbered Active Regions 135CH 17 7AR 4357 1Filaments and prominences 480
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 |
| January 2026 | 119.3 -4.7 |
| Last 30 days | 119.6 +1.6 |