17 April 2015
⇐20150416 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150418⇒

NOAA
5 Active Regions
12321
12322
12324
12325
12326

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W37S66
(234",-840") 		E81-W57
(138) 		3.0 -0.9 -4.8e33
2 E17S21
(-264",-254") 		E26-E01
(25) 		2.0 6.1 3.0e33
3 W67S35
(716",-520") 		W54-W76
(22) 		0.4 -1.4 -1.1e33

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-Apr-2015 23:35 UT .