27 August 2021
⇐20210826 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210828⇒

NOAA
3 Active Regions
12859
12860
12861

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 W01S01
(12",-139") 		E36-W42
(78) 		6.2 -0.0 -3.4e19
2 W00N68
(3",832") 		E91-W92
(183) 		3.8 1.1 1.3e21
3 E37S03
(-577",-148") 		E43-E31
(12) 		0.4 0.6 4.5e19
4 W11N42
(130",541") 		W09-W12
(3) 		0.1 -0.8 -8.1e18

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 27-Aug-2021 23:30 UT .