20 January 2021
⇐20210119 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210121⇒

NOAA
2 Active Regions
12797
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 W48N48
(483",766") 		E48-W61
(109) 		3.9 0.8 1.2e21
2 E18S68
(-114",-868") 		E43-W81
(124) 		2.9 -1.3 -1.3e21
3 E17S18
(-277",-215") 		E26-E07
(19) 		1.5 -3.7 -8.8e20
4 W36N11
(566",258") 		W18-W50
(32) 		1.4 -0.0 -1.0e19
5 W59S66
(337",-872") 		W48-W70
(22) 		0.3 -0.5 -7.2e19
6 W46S08
(702",-72") 		W43-W53
(10) 		0.2 -0.8 -3.8e19
7 W17N14
(285",310") 		W15-W19
(4) 		0.1 -1.3 -2.6e19
8 W48N02
(722",90") 		W45-W49
(4) 		0.0 -2.2 -1.7e19

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 20-Jan-2021 20:30 UT .