Viewing archive of Saturday, 14 July 2001

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 2001 Jul 14 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 195 Issued at 2200Z on 14 Jul 2001

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

Solar activity was low. Region 9539 (S18W02) produced sporadic minor C-class events, the largest being a C2/Sf flare at 14/0430 UTC. Region 9539 has shown significant growth in area and spot count and has also developed into a beta-gamma magnetic classification. Region 9541 (N18E54) also produced optical subflares during the period. The remainder of the disk and limbs were mostly quiet and stable.
IB. Solar Activity Forecast
Solar activity is expected to be at mostly low levels. If Region 9539 continues to develop into a more complex spot group, it could be capable of producing isolated M-class events.
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
The geomagnetic field was mostly quiet to unsettled with active conditions occurring between 14/0000 and 14/0600 UTC. This was probably the result of a passing transient solar wind disturbance.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be mostly quiet to active with isolated periods possible on 16-17 July, due to a favorably positioned coronal hole.
III. Event Probabilities 15 Jul to 17 Jul
Class M15%15%15%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       14 Jul 141
  Predicted   15 Jul-17 Jul  140/140/145
  90 Day Mean        14 Jul 151
V. Geomagnetic A Indices
  Observed Afr/Ap 13 Jul  007/009
  Estimated     Afr/Ap 14 Jul  010/015
  Predicted    Afr/Ap 15 Jul-17 Jul  008/011-012/013-012/013
VI. Geomagnetic Activity Probabilities 15 Jul to 17 Jul
A. Middle Latitudes
Active15%20%20%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active20%25%25%
Minor storm05%10%10%
Major-severe storm01%01%01%

All times in UTC

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Active geomagnetic conditions

Observed Kp: 4
Threshold reached: 20:32 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
Reykjavik
Kirkenes, Tromsø
Murmansk
Kiruna, Luleå

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

Tórshavn
Kuopio
Bergen, Trondheim
Arkhangelsk, Vorkuta
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
The strength of the interplanetary magnetic field is moderate (11.12nT), the direction is slightly South (-6.89nT).

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