17 December 2017
⇐20171216 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171218⇒

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 E07N13
(-120",234") 		E17-W10
(27) 		2.2 -0.2 -6.9e31
2 W28N22
(430",390") 		W10-W41
(31) 		1.4 0.7 3.7e32
3 W48N63
(327",876") 		W08-W76
(68) 		0.8 0.9 2.8e33
4 W57N13
(802",228") 		W50-W67
(17) 		0.5 1.3 6.3e32
5 E48N11
(-713",204") 		E57-E38
(19) 		0.4 -2.7 -7.8e32
6 E19S75
(-85",-936") 		E46-W37
(83) 		0.4 -0.8 -1.5e33
7 W50S70
(253",-912") 		W35-W57
(22) 		0.2 -1.1 -9.0e32
8 E32N04
(-512",87") 		E35-E28
(7) 		0.1 -2.3 -6.5e31
9 E21S03
(-349",-32") 		E23-E19
(4) 		0.1 -2.1 -3.1e31

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 17-Dec-2017 20:30 UT .