4 October 2017
⇐20171003 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171005⇒

NOAA
2 Active Regions
12682
12683

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 W25S23
(381",-463") 		W15-W33
(18) 		1.6 -2.1 -1.4e33
2 E56N31
(-682",432") 		E72-E41
(31) 		1.0 2.9 2.9e33
3 W21S70
(118",-931") 		54
(1.8e05) 		-0.3 14.5 2.7e34

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 4-Oct-2017 23:30 UT .