31 May 2015
⇐20150530 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150601⇒

NOAA
3 Active Regions
12356
12357
12355

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W28N58
(237",810") 		E40-W53
(93) 		3.3 0.3 1.6e33
2 W17S70
(97",-883") 		E18-W58
(76) 		0.9 -0.9 -2.1e33
3 W26N15
(400",257") 		W21-W29
(8) 		0.2 -2.7 -2.0e32

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 31-May-2015 23:35 UT .