Viewing archive of Saturday, 2 April 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 Apr 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 092 Issued at 2200Z on 02 Apr 2011IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z Solar activity was very low. Region 1183 (N15W12)
produced only B-class events.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low with a chance for moderate activity (isolated M-class)
from Region 1183 during the period (03 - 05 April).
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
The geomagnetic field was at quiet to active levels in response to a
coronal hole high-speed stream (CH HSS).
IIB. Geophysical Activity Forecast
Geomagnetic activity is
expected to be at quiet to unsettled levels during day one (03
April) with a chance for active levels as CH HSS effects persist.
Activity is expected to decrease to mostly quiet levels during days
two and three (04 - 05 April) as CH HSS effects subside.
III. Event Probabilities 03 Apr to 05 Apr
| Class M | 25% | 25% | 25% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 02 Apr 108 Predicted 03 Apr-05 Apr 110/110/105 90 Day Mean 02 Apr 098
V. Geomagnetic A Indices
Observed Afr/Ap 01 Apr 009/013 Estimated Afr/Ap 02 Apr 015/015 Predicted Afr/Ap 03 Apr-05 Apr 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 03 Apr to 05 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 10% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 10% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
Latest news
Friday, 17 May 2024
Let's compare! Halloween 2003 VS May 2024 Solar Storms!
Friday, 17 May 2024
Coronal mass ejection impact, New website feature!
Wednesday, 15 May 2024
More X-flares!
Latest forum messages
AR3685 76Incoming Active Regions 373Another interesting video 1Latest SC25 Predictions 128Filaments and prominences 132
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!
Space weather facts
| Last X-flare | 2024/05/15 | X2.9 |
| Last M-flare | 2024/05/19 | M1.6 |
| Last geomagnetic storm | 2024/05/17 | Kp6 (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2024 | 136.5 +31.6 |
| May 2024 | 157.7 +21.2 |
| Last 30 days | 169.2 +51.4 |