17 September 2017
⇐20170916 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170918⇒

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 W37N59
(297",764") 		E91-W83
(174) 		7.3 1.1 8.4e33
2 E45S07
(-673",-196") 		E50-E40
(10) 		0.5 -0.8 -2.2e32
3 E39S65
(-251",-898") 		E58-E05
(53) 		0.4 -0.7 -1.9e33
4 E46S17
(-661",-363") 		E52-E41
(11) 		0.3 -0.6 -1.1e32
5 E47S30
(-607",-549") 		E51-E43
(8) 		0.1 -1.0 -1.6e32

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-Sep-2017 19:30 UT .