Affichage des archives de dimanche, 28 mars 2004
Rapport d'activité solaire
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.
Rapport d'activité solaire et géophysique 2004 Mar 28 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 088 publié à 2200Z le 28 Mar 2004IA. Analyse des régions solaires actives et activité du 27-2100Z au 28-2100Z Solar activity was low. Today's activity consisted of a
few, low-level C-class flares. Most of these were from Region 582
(N15E30) which is the largest region on the disk and appears to be
growing slowly. New Region 587 (S13E73) rotated into view today as a
bright, moderately sized (110 millionths) bipolar region.
IB. Prévisions d'activité solaire
Solar activity is expected to be low,
but there is a chance for an isolated M-class event sometime during
the next three days (28-30 March) with Region 582 the most likely
source for energetic activity.
IIA. Résumé de l'activité géophysique du 27-2100Z au 28-2100Z
The geomagnetic field was mostly unsettled to active, with a minor
storm period from 0300-0600 UTC. Solar wind data show the continued
presence of a high speed stream. There was an overall decreasing
trend in solar wind velocity: initial speeds around 900 km/s
declined to around 650 km/s by forecast issue time. Fluctuations in
the interplanetary magnetic field were weak (-6 to + 6 nT), and
disappeared altogether between 1300-2000 UTC. The greater than 2 MeV
electron fluxes reached high levels during the past 24 hours.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to be unsettled to active for the next two days (28-29
March). A decrease to predominantly unsettled is expected by the
third day (30 March).
III. Probabilité d'éruption solaire du 29 Mar au 31 Mar
| Classe M | 35% | 35% | 35% |
| Classe X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 28 Mar 129 Prévisionnel 29 Mar-31 Mar 125/120/120 Moyenne des 90 derniers jours 28 Mar 111
V. Indice géomagnetique A
Observé Afr/Ap 27 Mar 012/014 Estimé Afr/Ap 28 Mar 018/020 Prévisionnel Afr/Ap 29 Mar-31 Mar 015/020-015/015-010/010
VI. Probabilités d'activité géomagnétique du 29 Mar au 31 Mar
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 30% | 30% | 25% |
| Tempête mineure | 25% | 25% | 20% |
| Tempête majeure/sévère | 10% | 10% | 05% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 30% | 30% | 25% |
| Tempête mineure | 25% | 25% | 20% |
| Tempête majeure/sévère | 20% | 20% | 10% |
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