21 December 2020
⇐20201220 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20201222⇒

NOAA
3 Active Regions
12794
12792
12793

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 W15N42
(188",679") 		E26-W38
(64) 		14.8 0.5 1.7e21
2 E23N12
(-377",228") 		E33-E08
(25) 		1.6 -0.0 -2.4e18
3 W53N41
(595",648") 		W43-W68
(25) 		0.6 0.2 4.9e19
4 E17S76
(-70",-939") 		E43-W17
(60) 		0.3 -0.9 -1.5e20
5 W52S73
(228",-926") 		W45-W58
(13) 		0.1 -1.6 -1.3e20
6 W33S77
(115",-946") 		W19-W58
(39) 		0.1 -0.8 -3.7e19
7 E19S01
(-321",19") 		3
(5.9e02) 		-1.0 3.7 2.2e19

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 21-Dec-2020 20:30 UT .