28 April 2021
⇐20210427 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210429⇒

NOAA
4 Active Regions
12818
12820
12821
12819

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's/Yesterday's NOAA Active Regions
NOAA Number
Latest
Position
Hale
Class
McIntosh Class
Sunspot Area
[millionths]
Number of Spots
Recent
Flares
12818 S17W34
(511",-220") 		α/α Hsx/Hsx 0010/0040 01/01 -
12820 S21W39
(561",-288") 		β/β Esi/Dsi 0070/0110 11/15 -
12821 S23W50
(673",-328") 		β/β Dai/Dsi 0060/0070 05/08 -
12819 N24W75
(841",403") 		/ / / / -

Class (HH:MM) -Today
Class (HH:MM) -Yesterday

Events not associated with currently named NOAA regions: None

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 28-Apr-2021 00:30 UT . The greyed out and light-blue entries are values from the previous day. Slashed cells indicate that the active region has no spots. The latest positions of the active regions are given in both heliographic and heliocentric co-ordinates. The region positions are valid on 28-Apr-2021 11:30 UT .