Viewing archive of Tuesday, 29 September 2009

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 2009 Sep 29 2201 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 272 Issued at 2200Z on 29 Sep 2009

IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z

Solar activity was very low. Region 1027 (N23W62) indicated a slight decrease in area and spot number and maintains a bipolar magnetic configuration. No significant flares were observed during the past 24 hours.
IB. Solar Activity Forecast
Solar activity is expected to be very low with a slight chance for a C-class event.
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet on day one (30 September). Quiet to unsettled levels are expected on days two and three (01-02 October) due to a coronal hole high speed stream.
III. Event Probabilities 30 Sep to 02 Oct
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       29 Sep 072
  Predicted   30 Sep-02 Oct  072/072/070
  90 Day Mean        29 Sep 069
V. Geomagnetic A Indices
  Observed Afr/Ap 28 Sep  006/008
  Estimated     Afr/Ap 29 Sep  002/005
  Predicted    Afr/Ap 30 Sep-02 Oct  005/005-007/007-007/007
VI. Geomagnetic Activity Probabilities 30 Sep to 02 Oct
A. Middle Latitudes
Active05%10%10%
Minor storm01%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active05%15%15%
Minor storm01%05%05%
Major-severe storm01%01%01%

All times in UTC

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G1 - Minor geomagnetic storm

Observed Kp: 5
Threshold reached: 23:37 UTC

Current data suggests there is a moderate possibility for aurora to appear at the following high latitude regions in the near future

Reykjavik

Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future

Iqaluit, NU
Nuuk
Tórshavn
Oulu, Rovaniemi, Sodankylä, Utsjoki
Kirkenes, Tromsø, Trondheim
Arkhangelsk, Murmansk
Kiruna, Luleå, Sundsvall, Umeå
The Disturbance Storm Time index predicts moderate storm conditions right now (-65nT)

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