O SOL no inicio de junho

UPDATE:

Uma rajada de vento solar aguda atingiu o campo magnético da Terra em aproximadamente 20:30 UT em 04 de junho.  Os observadores do céu em latitude alta em ambos os hemisférios devem estar em alertas para auroras:

 

Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Weather Prediction Center and the U.S. Air Force.

Updated 2011 Jun 04 2200 UTC

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 155 Issued at 2200Z on 04 Jun 2011

IA. Analysis of Solar Active Regions and Activity from 03/2100Z
to 04/2100Z: Solar activity was low. Region 1226 (S21W25) produced
a C1 at 03/2242Z. This region remains a D-type group with a beta
magnetic classification. All other numbered regions remained stable.
No new regions were numbered today.

IB. Solar Activity Forecast: Solar activity is expected to be low
with a slight chance for a M-class event.

IIA. Geophysical Activity Summary 03/2100Z to 04/2100Z:
The geomagnetic field was quiet to active. The ACE spacecraft
detected an interplanetary shock passage at 04/1958Z. Solar winds
jumped from around 325 km/s to 455 km/s, density increased, and the
IMF Bt went from 5nT to 20 nT. A geomagnetic sudden impulse was
observed at 04/2045Z (54 nT) on the Boulder USGS magnetometer. This
signature is consistent with the arrival of a CME. The greater than
2 MeV electron flux at geosynchronous orbit was at high levels
throughout the period.

IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be mostly active with isolated minor storm conditions,
and isolated major storming at high-latitudes, for day one (05
June). The source for the activity is a combination of continued
CME effects, and the arrival of a geoeffective coronal hole
high-speed stream. For day two (06 June) the geomagnetic field is
expected to be quiet to unsettled with isolated active conditions.
By day three (07 June) mostly quiet to unsettled levels are expected
as the activity subsides.

III. Event Probabilities 05 Jun-07 Jun
Class M 10/10/10
Class X 05/05/05
Proton 01/01/01
PCAF green

NADA DE MUITO IMPORTANTE!!!

 

Esta foi uma semana que o Sol voltou com uma actividade magnetica bastante expressiva. Nada de espetacular, nehuma tempestade nehuma ECM, e o mes  de maio  esteve  na sua actividade abaixo de março e abril com o SN do SIDC a 41,6 e uma media mensal do solar flux a 97,79. Assim  actividade do Sol no mes de maio foi mais fraco seja como SN que como SF. Só no fim do mes passado o Sol deu uma acelerada e apareceram manchas de uma certa importancia seja no hemisferio norte que no hemisferio sul do Sol. E asssim o Solar Flux que era descido até um valor de profundo minimo (82!) voltou a subir em cima de 100.


Enfim as imagens do sol em continuum e o magnetogramma.

Um bom fim de semana a todos e queria advertir que por falta de tempo alguns artigos nas proximas semanas serão sem a correcção na tradução do ingles para o portugues.

SAND-RIO

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