16 December 2017
⇐20171215 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171217⇒

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 W39N17
(583",293") 		W21-W55
(34) 		2.4 1.1 1.2e33
2 W07N22
(109",390") 		E08-W16
(24) 		1.5 0.8 3.2e32
3 W39N65
(262",890") 		E37-W70
(107) 		1.5 0.9 4.1e33
4 W26S18
(412",-283") 		W19-W35
(16) 		1.2 0.9 3.4e32
5 W34S71
(180",-915") 		W17-W68
(51) 		0.5 -1.3 -2.1e33
6 E35S73
(-159",-930") 		E67-W01
(68) 		0.3 -1.0 -1.7e33
7 E31S03
(-506",-38") 		E37-E25
(12) 		0.3 -1.5 -1.4e32
8 W06N39
(81",633") 		W03-W08
(5) 		0.1 -1.9 -4.7e31

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 16-Dec-2017 20:30 UT .