21 May 2021
⇐20210520 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210522⇒

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 W01N56
(8",804") 		E48-W63
(111) 		3.6 0.8 7.8e20
2 W04N14
(72",258") 		E07-W16
(23) 		2.4 0.5 1.8e20
3 W09S74
(40",-903") 		E58-W56
(114) 		0.8 -1.2 -5.0e20
4 W32S05
(496",-54") 		W28-W36
(8) 		0.2 -0.7 -2.4e19
5 E29S01
(-466",12") 		E32-E26
(6) 		0.1 -1.2 -1.3e19
6 W53N05
(755",96") 		W50-W56
(6) 		0.1 -0.8 -1.1e19

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 21-May-2021 23:30 UT .