Viewing archive of Saturday, 5 March 2011
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 2011 Mar 05 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 064 Issued at 2200Z on 05 Mar 2011IA. Analysis of Solar Active Regions and Activity from 04-2100Z to 05-2100Z
Solar activity was low. Region 1163 (N17W51), 1164
(N24W34) and Region 1165 (S21W52) produced several low level C-class
flares during the last 24 hours. Region 1164 and 1166 (N10E41) have
both continued to grow in white light areal coverage and spot count.
Region 1164 is a Fkc type spot group and has maintained its
Beta-Gamma-Delta magnetic configuration. Region 1166 is a Eki type
spot group and has formed a Beta-Gamma magnetic configuration.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a chance for an M-class event.
IIA. Geophysical Activity Summary 04-2100Z to 05-2100Z
The geomagnetic field has been quiet to unsettled. Observations from
the ACE spacecraft indicate very little influence is left from the
coronal hole high speed stream which has dominated for the past five
days. Solar wind speeds are now averaging below 500 km/s. The
greater than 2 MeV electron flux at geosynchronous orbit was at high
levels throughout the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels with isolated periods of
active conditions, and a slight chance for minor storm periods at
high latitudes, for the next two days (06-07 March). The activity
is expected due to the possible arrival of the CME observed on 03
March. Predominately quiet conditions are expected to return on day
three (08 March).
III. Event Probabilities 06 Mar to 08 Mar
| Class M | 45% | 45% | 45% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 05 Mar 135 Predicted 06 Mar-08 Mar 130/130/130 90 Day Mean 05 Mar 089
V. Geomagnetic A Indices
Observed Afr/Ap 04 Mar 007/010 Estimated Afr/Ap 05 Mar 004/005 Predicted Afr/Ap 06 Mar-08 Mar 008/008-008/008-005/005
VI. Geomagnetic Activity Probabilities 06 Mar to 08 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 05% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 05% |
| Minor storm | 10% | 10% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future
Yellowknife, NTFairbanks, AK
Latest news
Friday, 28 March 2025
X1.1 solar flare
Monday, 24 March 2025
Coronal hole faces Earth
Saturday, 22 March 2025
Strong G3 geomagnetic storm watch for 23 March
Latest forum messages
Solar Demon 3Unspecified geomagnetic activity 2146AR4046 134Aurora photography hints for those of us with smartphones 54AR4048 34
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Latest alerts
00:09 UTC - Solar flare
Moderate M1.03 flare
Sunday, 30 March 2025
23:51 UTC - Radio Blackout
Minor R1 radio blackout in progress (≥M1 - current: M1.03)
23:39 UTC - Solar flare
Moderate M1.52 flare
23:21 UTC - Radio Blackout
Minor R1 radio blackout in progress (≥M1 - current: M1.49)
23:09 UTC - Solar flare
Moderate M1.48 flare
Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/03/30 | M1.0 |
| Last geomagnetic storm | 2025/03/27 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2025 | 154.6 +17.6 |
| March 2025 | 127 -27.6 |
| Last 30 days | 127 -25.7 |