22 January 2021
⇐20210121 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210123⇒

NOAA
3 Active Regions
12797
12798
12796

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 W15S68
(97",-867") 		E80-W81
(161) 		2.9 -1.3 -1.3e21
2 W13S21
(210",-268") 		W04-W23
(19) 		1.5 -5.1 -1.2e21
3 W16N67
(102",930") 		E33-W51
(84) 		0.7 0.8 3.2e20
4 E00S24
(-2",-308") 		E02-W02
(4) 		0.1 -7.0 -6.0e19
5 W13N11
(222",272") 		W12-W15
(3) 		0.0 -3.3 -1.9e19

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 22-Jan-2021 20:30 UT .