(Habro el topic) Abro el tema para tener una referencia del estado y actividad solar, las imágenes son del SOHO, de la salida del Solar Data Analysis Center at NASA Goddard Space Flight Center in Greenbelt, Maryland USA, http://umbra.nascom.nasa.gov/images/latest.html
las que he puesto corresponden a diferentes frecuencias de ultravioleta, además de ser coloridas son bastante representativas

2006/11/20 19:00:13 - 171A

2006/11/20 20:00:09 - 195A

2006/11/20 19:06:07 - 284A

2006/11/20 19:19:36 - 304A

Como las imágenes del sol no cambian tanto, pongo otros datos, (21/11/2006)

AREAS ACTIVAS

NMBR   NOAA active region number.
LOCATION   Location on the visible disk.
LO   Longitude in the Carrington system.
AREA   Area of spots in millionths of the visible hemisphere
McI   Spot configuration in the McIntosh system.
LL   Length of spot group in degrees.
NN   Number of spots.
MAG TYPE   Magnetic configuration of the spots in the Mt. Wilson system.
   ALPHA = spots of only one magnetic polarity.
   BETA = spots of both polarities, separated.
   GAMMA = spots of both polarities, intermingled.
   DELTA = spots of both polarities in a single penumbra.

http://www.solar.ifa.hawaii.edu/ARMaps/armaps.html


INDICES FOTOMÉTRICOS (puntos y manchas solares)

ExpAn Explanation of Photometric Indices

Sunspot area is the total area of all sunspots on the solar disk, computed from the red (672.3 nm) images, in millionths of the solar hemisphere.

Sunspot deficit is the change, in millionths, of the total solar irradiance (TSI), formerly known as the "solar constant", due to sunspots. This value is computed from the measured contrast of all sunspots seen in the red (672.3 nm) image.

Facular area is the total area of all faculae on the K line image, in millionths of the solar hemisphere.

Facular excess is the change, in millionths, of the total solar irradiance (TSI) due to faculae. This value is computed from a model and the sizes and locations of the bright areas seen in the K line image.

K line excess (also known as Photometric Facular Index or PFIFX) is the change, in millionths, of the emission from the Sun in the Ca II K line image due to the presence of faculae.

http://www.csun.edu/sfo/dailyim.cgi

unas fotos de la corona, auroras y algún dato más,