15 December 2017
⇐20171214 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171216⇒

NOAA
1 Active Region
12691

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 W23N19
(355",333") 		E05-W36
(41) 		5.3 1.0 1.6e33
2 W36N63
(261",873") 		E59-W75
(134) 		2.7 0.7 4.6e33
3 W17S72
(88",-921") 		E68-W53
(121) 		1.1 -1.1 -3.5e33
4 W08S11
(135",-177") 		W01-W12
(11) 		0.8 1.2 1.8e32
5 E49S03
(-736",-43") 		E54-E44
(10) 		0.1 -1.6 -8.6e31
6 W28S04
(465",-60") 		W27-W30
(3) 		0.1 2.8 6.7e31
7 E45S24
(-637",-381") 		E49-E41
(8) 		0.1 -1.6 -8.2e31

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 15-Dec-2017 20:30 UT .