NOAA/SWPC ASCII Solar Disk
Issued: 2026 Jul 30 0030 UTC



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Active Regions

AR 4492  loc=N16W61 area=90   extent=4   zurich=HSX spots=3   mag=A  
AR 4494  loc=S03W42 area=40   extent=1   zurich=HSX spots=1   mag=A  
AR 4495  loc=S02W53 area=10   extent=1   zurich=CRO spots=1   mag=B  
AR 4496  loc=N05W10 area=60   extent=3   zurich=HSX spots=1   mag=A  
AR 4497  loc=S19W62 area=10   extent=1   zurich=AXX spots=1   mag=A  
AR 4498  loc=N14E50 area=140  extent=5   zurich=DAI spots=11  mag=BG   flare_risk=ELEVATED
AR 4499  loc=N04E18 area=30   extent=7   zurich=CRO spots=8   mag=BG   flare_risk=ELEVATED
AR 4500  loc=N18E58 area=10   extent=2   zurich=CRO spots=2   mag=B  
AR 4501  loc=S09E16 area=20   extent=5   zurich=DRO spots=5   mag=BG   flare_risk=ELEVATED

Flare watch

AR 4498  risk=ELEVATED  loc=N14E50 zurich=DAI mag=BG
AR 4499  risk=ELEVATED  loc=N04E18 zurich=CRO mag=BG
AR 4501  risk=ELEVATED  loc=S09E16 zurich=DRO mag=BG

Legend:
  North = up, West = right, East = left
  Numbers are NOAA active region IDs
  !NNNN  = elevated flare-risk region (beta-gamma)
  !!NNNN = high flare-risk region (beta-delta)
  !!!NNNN= very high flare-risk region (beta-gamma-delta)

Region fields:
  area   = sunspot area (millionths of solar hemisphere)
  extent = longitudinal extent (degrees)
  zurich = Zurich/McIntosh sunspot classification
  spots  = number of individual sunspots
  mag    = magnetic classification (Mount Wilson)

Zurich class (1st letter):
  A = single small spot/group without penumbra
  B = bipolar group without penumbra
  C = bipolar group; one main spot has penumbra
  D = bipolar group with penumbra on both main spots, length < 10 deg
  E = bipolar group with penumbra on both main spots, length 10-15 deg
  F = large bipolar group with penumbra on both main spots, length > 15 deg
  H = single sunspot with penumbra

Penumbra class (2nd letter):
  X = no penumbra
  R = rudimentary penumbra
  S = small symmetric penumbra
  A = small asymmetric penumbra
  H = large symmetric penumbra
  K = large asymmetric penumbra

Compactness class (3rd letter):
  X = unipolar / not applicable
  O = open
  I = intermediate
  C = compact

Magnetic classification:
  A   = alpha
  B   = beta
  BG  = beta-gamma
  BD  = beta-delta
  BGD = beta-gamma-delta

Flare watch:
  ELEVATED  = beta-gamma
  HIGH      = beta-delta
  VERY HIGH = beta-gamma-delta
  This is a simple magnetic-complexity flag, not a NOAA flare forecast.

Source: NOAA SWPC solar-regions.txt