Viendo archivo del miércoles, 17 abril 2002

Informe actividad solar

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.
Informe de actividad Solar-Geofísica 2002 Apr 17 2200 UTC
Preparado por NOAA © SWPC y procesado por

Informe conjunto USAF/NOAA de actividad Solar y Geofísica

SDF Número 107 Publicado el 2200Z a las 17 Apr 2002

IA. Análisis de regiones solares activas y de actividad desde 16-2100Z hasta 17-2100Z

Solar activity was moderate. Region 9906 (S14W41) produced a long-duration M2/2n flare at 17/0824 UTC. This flare was associated with a 3000 sfu radio burst at 2695 MHz, Type II/IV radio sweeps, and an Earth-directed "halo" CME visible in LASCO images. The region appears to have retained its size and complexity following the flare. Eruptive limb activity (EPL, BSL, and flare) in the vicinity of Region 9905 (S15W90) occurred during and after the LDE event in 9906.
IB. Pronóstico de la actividad solar
Solar activity is expected to be moderate. Additional M-class flares, possibly including a major flare, are expected in Region 9906.
IIA. Resumen de la actividad geofísica 16-2100Z a 17-2100Z
The geomagnetic field ranged from quiet to major storm levels. A shock was observed at the NASA ACE spacecraft at 17/1022 UTC and was followed by an SI at ground magnetometers at 17/1109 UTC (57 nT at Boulder). This shock is believed to be associated with the LDE M1/CME which occurred on 15 April. A greater than 10 MeV proton event began at 17/1530 UTC. The maximum flux observed so far was 24 pfu at 17/1540 UTC. This event is believed to be associated with the LDE M2 discussed in Part IA.
IIB. Pronóstico de la actividad geofísica
The geomagnetic field is expected to be at active to minor storm levels as the current disturbance recovers over the next 24 hours. Another disturbance at minor to major storm levels is expected to begin on 19 April in response to the LDE M2/CME which occurred on 17 April. The greater than 10 MeV proton event currently in progress is expected to end within the next 24 hours.
III. Probabilidades del evento 18 Apr a 20 Apr
Clase M75%60%50%
Clase X10%10%05%
IV. Penticton 10.7cm flujo
  Observado       17 Apr 194
  Previsto   18 Apr-20 Apr  190/185/180
  Media de 90 Días        17 Apr 201
V. Índices Geomagnéticos A
  Observado Afr/Ap 16 Apr  005/010
  Estimado     Afr/Ap 17 Apr  035/055
  Previsto    Afr/Ap 18 Apr-20 Apr  020/020-040/040-020/030
VI. Probabilidades de Actividad Geomagnética 18 Apr a 20 Apr
A. Latitudes Medias
Tormenta Menor20%30%20%
Tormenta Mayor-Severa10%20%10%
B. Latitudes Altas
Tormenta Menor25%50%25%
Tormenta Mayor-Severa15%30%15%

All times in UTC

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