23 May 2021
⇐20210522 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210524⇒

NOAA
1 Active Region
12824

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 W26N55
(238",787") 		E08-W33
(41) 		2.8 0.9 7.5e20
2 E41S05
(-616",-64") 		E44-E37
(7) 		0.1 1.4 2.2e19
3 W23N27
(333",458") 		W21-W26
(5) 		0.1 1.7 2.1e19
4 W26N23
(380",399") 		W23-W28
(5) 		0.0 -0.7 -6.2e18

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-May-2021 23:30 UT .