2 February 2017
⇐20170201 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170203⇒

NOAA
4 Active Regions
12629
12632
12630
12631

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 W28S52
(280",-705") 		E72-W53
(125) 		14.6 -1.3 -1.3e34
2 E37S01
(-589",70") 		E54-E21
(33) 		1.2 1.1 5.1e32
3 W14N24
(213",482") 		W12-W16
(4) 		0.1 -6.1 -1.8e32

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 2-Feb-2017 14:02 UT .