1 February 2017
⇐20170131 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170202⇒

NOAA
4 Active Regions
12629
12631
12632
12630

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 W12S50
(132",-684") 		E60-W41
(101) 		16.3 -1.3 -1.2e34
2 E51S01
(-753",40") 		E60-E38
(22) 		0.5 1.0 3.6e32
3 W04N25
(57",509") 		E03-W07
(10) 		0.5 -1.7 -2.7e32
4 W17N22
(268",458") 		W12-W22
(10) 		0.5 -0.7 -1.0e32
5 W27N30
(388",561") 		W22-W31
(9) 		0.1 -1.0 -5.3e31
6 W39N05
(610",172") 		W36-W42
(6) 		0.1 -0.8 -3.0e31
7 W08N23
(132",472") 		W07-W10
(3) 		0.0 -2.6 -3.6e31

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-Feb-2017 20:30 UT .