22 December 2020
⇐20201221 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20201223⇒

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 W23N01
(376",39") 		E12-W49
(61) 		7.4 0.2 2.0e20
2 W35N53
(340",794") 		E64-W49
(113) 		6.2 0.9 1.8e21
3 E06N15
(-96",283") 		E16-W15
(31) 		1.5 -0.1 -1.7e19
4 W04S76
(18",-939") 		E35-W26
(61) 		0.3 -1.1 -1.9e20
5 E48S68
(-272",-896") 		E74-E34
(40) 		0.2 -0.5 -5.6e19
6 E44S15
(-660",-228") 		E46-E41
(5) 		0.1 -2.7 -5.4e19
7 W50N05
(745",111") 		W48-W52
(4) 		0.1 -1.3 -2.1e19
8 W11S13
(186",-195") 		W09-W13
(4) 		0.0 -1.2 -7.4e18

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-Dec-2020 20:30 UT .