23 January 2021
⇐20210122 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210124⇒

NOAA
3 Active Regions
12797
12798
12799

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 W43S66
(271",-860") 		E52-W62
(114) 		2.8 -1.1 -1.2e21
2 W24S22
(369",-286") 		W13-W32
(19) 		1.3 -6.0 -1.4e21
3 W19N65
(136",918") 		E08-W53
(61) 		0.6 0.8 2.5e20
4 W23N06
(381",189") 		W20-W26
(6) 		0.1 -1.6 -2.8e19
5 E08N24
(-121",474") 		E10-E05
(5) 		0.1 -1.5 -1.8e19

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 23-Jan-2021 20:30 UT .