1 April 2017
⇐20170331 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170402⇒

NOAA
4 Active Regions
12644
12645
12647
12643

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 W15S58
(131",-751") 		E65-W74
(139) 		10.8 -1.1 -8.9e33
2 W19N06
(318",195") 		W06-W30
(24) 		1.8 0.9 4.2e32
3 E24S00
(-387",95") 		E38-E09
(29) 		1.6 -0.0 -4.6e30
4 E41S25
(-567",-330") 		E44-E37
(7) 		0.1 -1.1 -3.2e31
5 E47S27
(-631",-362") 		E50-E45
(5) 		0.0 -1.2 -3.5e31

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 1-Apr-2017 19:30 UT .