31 January 2017
⇐20170130 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170201⇒

NOAA
3 Active Regions
12629
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 E06S48
(-70",-656") 		E72-W29
(101) 		17.7 -1.4 -1.2e34
2 W08N68
(51",934") 		E14-W24
(38) 		0.4 0.6 8.2e32
3 W25N06
(406",190") 		W20-W29
(9) 		0.3 -1.4 -1.1e32
4 E14N22
(-219",456") 		E17-E12
(5) 		0.2 -2.9 -2.0e32
5 E07N19
(-120",410") 		E10-E05
(5) 		0.1 -3.6 -1.2e32
6 E55S03
(-802",7") 		E58-E52
(6) 		0.1 2.9 1.4e32
7 W24S13
(387",-131") 		W22-W26
(4) 		0.1 -1.6 -2.1e31

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-Jan-2017 20:30 UT .