| Area = area in tens of millionths of the solar hemisphere
Z = sunspot group classification
|
Catania sunspot group
|
Zurich sunspot class |
penumbrae of largest spot |
relative importance of the leading spot and density
of the sunspot population |
|
NOAA region
|
McIntosh
|
| modified Zurich class |
penumbrae of largest spot |
sunspot distribution (compactness of central spot) |
N = number of spots
L = longitudinal extent in degrees |
Catania sunspot
group
history plot:
-Probabilities (in %) for the occurence of C-, M- and X-flares, based
on statistics of McIntosh classification (reported in the plot for X-flares)
-Schematic of time history of flaring, represented by blue pikes
of magnitude scaled in the respective C-, M- and X-flare class (e.g. a C9.5 flare
is represented as a blue pike of ordinate 95 in the diagram for C-flares).
-Area and number of spots in the group.
NOAA region
images of the region from BBSO website
NOAA plage
BBSO activity report
expected returning NOAA region
IPS
summary |