21 October 2018
⇐20181020 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20181022⇒

NOAA
2 Active Regions
12724
12725

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 W12S08
(192",-225") 		E24-W39
(63) 		17.8 -0.2 -9.5e20
2 W22N66
(147",846") 		E40-W57
(97) 		3.5 1.2 6.0e21
3 W27S70
(155",-927") 		W04-W54
(50) 		0.2 -0.6 -9.9e20
4 W45S48
(458",-752") 		W38-W54
(16) 		0.2 -0.2 -9.1e19
5 E11S71
(-58",-936") 		E16-W03
(19) 		0.1 -1.1 -7.0e20

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 21-Oct-2018 23:10 UT .