24 August 2021
⇐20210823 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210825⇒

NOAA
2 Active Regions
12859
12858

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 E07N71
(-37",855") 		E91-W61
(152) 		2.7 1.1 1.0e21
2 W17N15
(271",139") 		W12-W21
(9) 		0.9 -2.3 -3.2e20
3 W20S30
(282",-564") 		W12-W27
(15) 		0.4 -7.1 -6.4e20
4 W56N50
(508",678") 		W53-W60
(7) 		0.0 2.1 2.5e19

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-Aug-2021 23:30 UT .