4 August 2018
⇐20180803 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180805⇒

NOAA
1 Active Region
12717

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 W08N67
(48",832") 		E63-W76
(139) 		4.3 1.1 5.9e21
2 W24N27
(345",340") 		E02-W47
(49) 		3.7 0.1 1.6e20
3 E49S06
(-706",-172") 		E62-E36
(26) 		0.7 -1.0 -4.8e20
4 W50S20
(678",-387") 		W37-W58
(21) 		0.3 -1.2 -3.0e20

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 4-Aug-2018 23:10 UT .