Viewing archive of Monday, 14 March 2011

Solar activity report

Report of Solar-Geophysical Activity 2011 Mar 14 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 073 Issued at 2200Z on 14 Mar 2011

IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z

Solar activity was moderate. Region 1169 (N18W47) produced an impulsive M4/1n flare at 14/1952Z with associated radio bursts at the higher range (4995, 8800, 15400 MHz). Region 1166 (N09W78) and 1169 are both Dao type spot groups and contain a beta-gamma magnetic classification.
IB. Solar Activity Forecast
Solar activity is expected to be low with a chance for an M-class event for day one (15 March). Low activity with a slight chance for an M-class event are expected for days two and three (16-17 March) as Regions 1166 and 1169 make their transit around the west limb of the sun.
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
The geomagnetic field was quiet. Solar wind speeds observed by the ACE spacecraft continue to average around 550 km/s under the influence of a coronal hole high speed stream.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be predominantly quiet for the next three days (15-17 March).
III. Event Probabilities 15 Mar to 17 Mar
Class M40%20%15%
Class X05%01%01%
IV. Penticton 10.7 cm Flux
  Observed       14 Mar 107
  Predicted   15 Mar-17 Mar  105/100/100
  90 Day Mean        14 Mar 094
V. Geomagnetic A Indices
  Observed Afr/Ap 13 Mar  005/006
  Estimated     Afr/Ap 14 Mar  003/005
  Predicted    Afr/Ap 15 Mar-17 Mar  005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 15 Mar to 17 Mar
A. Middle Latitudes
Minor storm01%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm01%01%01%
Major-severe storm01%01%01%

<< Go to daily overview page


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-flare2017/09/10X8.2
Last M-flare2020/05/29M1.1
Last geomagnetic storm2020/04/20Kp5 (G1)
Spotless days
Last 365 days293 days
2020157 days (71%)
Last spotless day2020/07/20

This day in history*

Solar flares
*since 1994

Social networks