19 September 2017
⇐20170918 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170920⇒

NOAA
1 Active Region
12680

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 E21S42
(-251",-722") 		E61-W23
(84) 		4.7 -0.5 -1.8e33
2 W38N64
(261",812") 		E76-W59
(135) 		4.3 0.9 5.5e33
3 E06S17
(-96",-384") 		E10-E02
(8) 		0.3 -0.9 -7.1e31

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 19-Sep-2017 19:30 UT .