Guarda l'archivio di giovedì, 19 giugno 2003

Rapporto attività solare

Rapporto dell'attività geofisica solare 2003 Jun 19 2200 UTC
Preparato dal NOAA © SWPC ed elaborato da

Relazione congiunta USAF/NOAA sull'attività solare e geofisica

Numero SDF 170 rilasciato alle 2200Z il 19 Jun 2003

IA. Analisi delle regioni solari attive e delle attività dal 18-2100Z al 19-2100Z

Solar activity decreased to very low levels. Flare activity was limited to several B-class flares. Region 386 (S07E30) lost penumbral coverage over the period although it does retain a delta magnetic structure in the dominant lead spot. Region 387 (N18E49) grew in both penumbral coverage and magnetic complexity since yesterday, a gamma structure is now evident in the trailing portion of the spot group. Newly numbered Region 388 (S03E08) produced a minor B-class flare early in the period.
IB. Previsione dell'Attività Solare
Solar activity is expected to be at moderate levels. Region 386 remains capable of producing an isolated major flare.
IIA. Sommario dell'Attività Geofisica dal 18-2100Z al 19-2100Z
The geomagnetic field was at predominantly active levels today. Minor storm conditions were observed at both middle and high latitudes between 19/0000 and 0300Z due to the influence of a recurrent high speed coronal hole stream. The greater than 10 MeV proton flux exceeded event threshold at 18/2050Z (reached a max of 24 pfu at 19/0450Z), ended at 19/1900Z and after careful review the event is believed to have been the result of the M6.8 x-ray flare from June 17. The greater than 2 MeV electron flux reached moderate levels today.
IIB. Previsione dell'Attività Geofisica
The geomagnetic field is expected to be at predominantly unsettled to active levels through the interval. Minor storm conditions may exist due to a transient passage during the first half of day one in response to the M6.8 x-ray flare from June 17.
III. Probabilità di evento 20 Jun to 22 Jun
Classe M50%50%50%
Classe X15%15%15%
IV. Penticton 10.7 cm Flux
  Osservato       19 Jun 123
  Previsto   20 Jun-22 Jun  125/125/125
  Media di 90 giorni        19 Jun 124
V. Indici Geomagnetici A
  Osservato Afr/Ap 18 Jun  036/054
  Stimato     Afr/Ap 19 Jun  023/025
  Previsto    Afr/Ap 20 Jun-22 Jun  020/025-020/025-012/020
VI. Probabilità di Attività Geomagnetica dal 20 Jun al 22 Jun
A. Medie Latitudini
Tempesta minore15%15%10%
Tempesta maggiore intensa10%10%05%
B. Alte Latitudini
Tempesta minore20%20%15%
Tempesta maggiore intensa10%10%10%
PLAIN GOES Protons: To ensure continued operational monitoring of important energetic particle data, it is necessary to reassign primary/secondary designations for the GOES Space Environment Monitor (SEM) detectors. GOES 11 (113W) is now the primary satellite for protons. GOES 12 will continue as the primary satellite for magnetometer, X-ray, and electron measurements. GOES 10 (135W) will be the secondary satellite for all SEM sensors - magnetometer, X-ray, and energetic particles. Because of the degraded state of the proton data on GOES-10, its designation as the secondary source for proton data is a short-term solution. More permanent solutions have been identified and are being evaluated. Users will be notified when we define and schedule a permanent fix. Further details can be found at K-Indices: On 16 June, it was determined that a scaling problem exists with the Boulder magnetometer instrument. While this problem, and its fix are being investigated the primary instrument for Boulder K-indices has been switched to the Boulder USGS (via Domsat) magnetometer, effective 1500 UTC on 16 June. 99999

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