18 April 2015
⇐20150417 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150419⇒

NOAA
6 Active Regions
12321
12324
12325
12326
12327
12322

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W48S67
(274",-855") 		E51-W60
(111) 		2.1 -0.8 -4.4e33
2 E02S21
(-27",-251") 		E11-W11
(22) 		1.9 6.3 2.4e33

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-Apr-2015 23:35 UT .