Viewing archive of Monday, 28 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 28 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 087 Issued at 2200Z on 28 Mar 2011

IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z

Solar activity was at low levels. Region 1181 (S26E31) produced a C1/Sf flare at 27/2326Z while Region 1176 (S17W11) produced a C1 X-ray event at 28/1139Z. Region 1176 decayed in area and spot count, but maintained a complex beta-gamma magnetic configuration. Region 1183 (N15E54) indicated growth in area and spot count as it continued to rotate onto the disk. At 28/1405Z, a filament eruption was observed in STEREO-B EUVI 195 near N20, L=030. Associated with this eruption was a CME that lifted off the NE limb, first observed in LASCO C3 imagery at 28/1818Z. Due to the source of this CME, it is not Earth-directed. No new regions were numbered during the period.
IB. Solar Activity Forecast
Solar activity is expected to be low all three days of the forecast period (29 - 31 March). A chance exists all three days for isolated M-class activity.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic field was quiet. ACE solar wind velocities remained low and steady, only varying between 340 km/s to 370 km/s. The Bz component of the IMF ranged between +/- 4 nT.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet for day one (29 March). By days two and three (30 - 31 March), quiet to unsettled conditions, with isolated active periods, are expected due to the arrival of a recurrent coronal hole high speed stream.
III. Event Probabilities 29 Mar to 31 Mar
Class M35%50%50%
Class X01%05%05%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       28 Mar 119
  Predicted   29 Mar-31 Mar  120/130/135
  90 Day Mean        28 Mar 097
V. Geomagnetic A Indices
  Observed Afr/Ap 27 Mar  002/002
  Estimated     Afr/Ap 28 Mar  002/002
  Predicted    Afr/Ap 29 Mar-31 Mar  005/005-010/010-010/010
VI. Geomagnetic Activity Probabilities 29 Mar to 31 Mar
A. Middle Latitudes
Active10%20%20%
Minor storm01%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active15%25%25%
Minor storm01%10%10%
Major-severe storm01%01%01%

All times in UTC

<< Go to daily overview page

Latest news

Support 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!

SpaceWeatherLive Pro
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/11/06X2.39
Last M-flare2024/11/23M1.1
Last geomagnetic storm2024/11/10Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
October 2024166.4 +25
November 2024144.7 -21.7
Last 30 days158.6 +10.8

This day in history*

Solar flares
12000X3.4
22000X2.87
32000X2.71
41998X1.54
51999M4.33
DstG
12001-221G4
21982-197G3
31986-86G2
41981-66
51991-65
*since 1994

Social networks