28 November 2021
⇐20211127 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211129⇒

NOAA
4 Active Regions
12898
12899
12900
12897

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W14N51
(144",743") 		E23-W71
(94) 		6.1 0.7 1.1e21
2 E38S13
(-583",-232") 		E57-E08
(49) 		4.6 1.4 1.3e21
3 E26N08
(-430",118") 		E29-E24
(5) 		0.1 -0.8 -1.1e19
4 E03S15
(-51",-273") 		E04-E02
(2) 		0.0 -1.4 -7.7e18

Note: Solar Monitor's coronal hole segmentations are performed by CHIMERA, a copy of which is available at: github.com/TCDSolar/CHIMERA.

The operations of the CHIMERA algorithm is described in a peer reviewed paper: arxiv.org/abs/1711.11476.

An extensive copy of coronal hole properties are available at: solarmonitor.org/data.

The latest positions of the coronal holes are given in heliocentric co-ordinates, and the region positions are valid on 28-Nov-2021 20:30 UT .