Viewing archive of Sunday, 7 July 2002

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 2002 Jul 07 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 188 Issued at 2200Z on 07 Jul 2002

IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z

Solar activity was moderate. A long duration M1.0 flare occurred during 07/1114-1143-1317 UTC. Imagery from SOHO/LASCO revealed a fast partial halo CME off the southwest limb in association with this event, possibly from old Region 17 (S18, L=235) behind the west limb. This event also caused an enhancement in energetic protons (see section IIA below). Other activity included a multi-peak C-class event with maximum flux of C3.5 at 07/0401 UTC. H-alpha imagery from the IPS Culgoora observatory revealed an active prominence on the southwest limb as well as plage brightening in Region 19 (S19W32) in association with this event. Another event of interest occurred at about 07/1700 UTC, with a large, 35-degree filament eruption centered near N11W49, which also produced a CME visible in SOHO/LASCO imagery. New Region 27 (S15E26) was numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be low to moderate. Region 19 remains a potential source of M-class flare activity.
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
The geomagnetic field was predominantly quiet to unsettled, with one isolated active period observed at Boulder during 07/1500-1800 UTC. Coronal hole effects appeared to wane throughout the day. A 10 MeV proton event began at 07/1830 UTC, due to enhanced flux following the LDE discussed in section 1A above, and remains in progress. Maximum flux observed thus far was 22 pfu at 07/1955 UTC.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be mainly quiet to unsettled. Isolated active periods are possible during the next 3 days, in response to earlier CME activity from Region 19 as well as from the filament eruption and other flare activity observed today.
III. Event Probabilities 08 Jul to 10 Jul
Class M35%30%30%
Class X01%01%01%
Proton35%01%01%
PCAFyellow
IV. Penticton 10.7 cm Flux
  Observed       07 Jul 137
  Predicted   08 Jul-10 Jul  132/130/130
  90 Day Mean        07 Jul 168
V. Geomagnetic A Indices
  Observed Afr/Ap 06 Jul  018/023
  Estimated     Afr/Ap 07 Jul  011/013
  Predicted    Afr/Ap 08 Jul-10 Jul  015/015-012/012-012/008
VI. Geomagnetic Activity Probabilities 08 Jul to 10 Jul
A. Middle Latitudes
Active30%25%25%
Minor storm10%10%10%
Major-severe storm01%01%01%
B. High Latitudes
Active35%30%25%
Minor storm15%15%15%
Major-severe storm01%01%01%

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