27 February 2017
⇐20170226 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170228⇒

NOAA
4 Active Regions
12638
12639
12640
12637

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 E21S47
(-234",-622") 		E83-W25
(108) 		15.4 -1.4 -1.0e34
2 E58S02
(-820",26") 		E70-E47
(23) 		0.5 1.0 5.0e32
3 E36S05
(-569",7") 		E43-E26
(17) 		0.3 1.2 1.4e32

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-Feb-2017 20:30 UT .