24 April 2021
⇐20210423 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210425⇒

NOAA
2 Active Regions
12816
12818

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 W19N55
(180",820") 		E58-W54
(112) 		4.4 0.4 6.0e20
2 E40N11
(-600",238") 		E60-E14
(46) 		4.3 0.4 3.3e20
3 E08N09
(-136",223") 		E14-W03
(17) 		1.6 0.0 1.0e18
4 E36S71
(-178",-880") 		E73-W14
(87) 		1.0 -1.4 -6.2e20
5 E12S56
(-112",-748") 		E17-E04
(13) 		0.1 -1.2 -1.5e19

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 24-Apr-2021 23:30 UT .