Viewing archive of Sunday, 28 September 2003

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 2003 Sep 28 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 271 Issued at 2200Z on 28 Sep 2003

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

Solar activity has been low. Region 464 has grown in complexity, and produced several long-duration C-class flares, including a C2.3 at 28/1428 UTC and a C6.8/Sf at 28/1558 UTC. An 11-degree filament at N56E01 erupted sometime between 27/2318 and 28/1359 UTC.
IB. Solar Activity Forecast
Solar activity is expected to be low to moderate. Region 464 has become more complex and may produce C- and M-class flares.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic field has been quiet to unsettled. Solar wind speeds continue to decrease to below 400 km/s as a coronal hole leaves geoeffective position. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled throughout the period.
III. Event Probabilities 29 Sep to 01 Oct
Class M50%50%50%
Class X15%15%15%
Proton05%05%05%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       28 Sep 137
  Predicted   29 Sep-01 Oct  125/125/125
  90 Day Mean        28 Sep 119
V. Geomagnetic A Indices
  Observed Afr/Ap 27 Sep  013/009
  Estimated     Afr/Ap 28 Sep  008/010
  Predicted    Afr/Ap 29 Sep-01 Oct  012/015-012/015-012/015
VI. Geomagnetic Activity Probabilities 29 Sep to 01 Oct
A. Middle Latitudes
Active30%30%30%
Minor storm15%10%10%
Major-severe storm05%05%05%
B. High Latitudes
Active35%35%35%
Minor storm20%15%15%
Major-severe storm15%10%10%

All times in UTC

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G1 - Minor geomagnetic storm

Observed Kp: 5
Threshold reached: 20:20 UTC

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

Oulu, Rovaniemi, Sodankylä, Utsjoki
Kirkenes
Arkhangelsk, Murmansk, Vorkuta
Kiruna, Luleå

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

Kuopio
Bergen, Trondheim
Sundsvall, Umeå

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

Tampere
Petrozavodsk, Syktyvkar
The solar wind speed is currently moderately high (547 km/sec.)
The maximum X-ray flux of the past two hours is:
M1.05

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