25 October 2017
⇐20171024 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171026⇒

NOAA
2 Active Regions
12685
12686

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 W15N65
(106",841") 		E85-W54
(139) 		4.3 1.0 5.5e33
2 W55N18
(750",256") 		W44-W70
(26) 		0.8 1.3 8.7e32
3 W44N32
(568",454") 		W34-W53
(19) 		0.6 0.5 1.6e32
4 E22S70
(-126",-930") 		E41-E12
(29) 		0.1 -0.8 -5.6e32
5 E18N47
(-199",655") 		E21-E15
(6) 		0.1 -0.5 -1.4e31

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 25-Oct-2017 23:30 UT .