Viewing archive of Saturday, 11 June 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 Jun 11 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 162 Issued at 2200Z on 11 Jun 2011

IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z

Solar activity decreased to very low levels. Occasional B-class x-ray flares occurred. There were three small, simply-structured spots groups on the disk, including newly-numbered Region 1235 (N14E27). No Earth-directed coronal mass ejections occurred during the period.
IB. Solar Activity Forecast
Solar activity is expected to be very low through the period (12 - 14 June) with a slight chance for a C-class flare.
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
Geomagnetic activity was at quiet to active levels. Active levels occurred during 11/0300 - 0600Z, associated with a period of increased interplanetary magnetic field (IMF) Bt (peak 10 nT) and southward IMF Bz (peak deflection -8 nT). ACE solar wind data indicated a co-rotating interaction region occurred during the first half of the period, in advance of a coronal hole high-speed stream (CH HSS). The CH HSS commenced around 11/1025Z, followed by a gradual increase in solar wind speeds (380 to 460 km/s) during the rest of the period.
IIB. Geophysical Activity Forecast
Geomagnetic activity is expected to be at quiet to unsettled levels during days 1 - 3 (12 - 14 June) with a chance for brief active periods due to CH HSS effects.
III. Event Probabilities 12 Jun to 14 Jun
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       11 Jun 085
  Predicted   12 Jun-14 Jun  084/084/084
  90 Day Mean        11 Jun 104
V. Geomagnetic A Indices
  Observed Afr/Ap 10 Jun  007/008
  Estimated     Afr/Ap 11 Jun  012/012
  Predicted    Afr/Ap 12 Jun-14 Jun  008/008-008/008-007/007
VI. Geomagnetic Activity Probabilities 12 Jun to 14 Jun
A. Middle Latitudes
Active20%20%15%
Minor storm10%10%05%
Major-severe storm01%01%01%
B. High Latitudes
Active25%25%20%
Minor storm15%15%10%
Major-severe storm01%01%01%

All times in UTC

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