18 May 2018
⇐20180517 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180519⇒

NOAA
1 Active Region
12709

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 E12N42
(-148",664") 		E68-W16
(84) 		7.4 0.8 3.1e33
2 E01S69
(-6",-874") 		E74-W51
(125) 		1.9 -1.2 -4.4e33

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 18-May-2018 15:30 UT .