19 April 2017
⇐20170418 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170420⇒

NOAA
2 Active Regions
12651
12650

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 E39S19
(-570",-250") 		E67-E15
(52) 		5.6 -1.4 -3.4e33
2 W41S17
(606",-211") 		W29-W72
(43) 		2.8 1.2 1.6e33
3 W34N62
(250",877") 		E39-W60
(99) 		1.6 0.4 1.9e33
4 W59S70
(273",-882") 		W32-W84
(52) 		0.4 -1.1 -1.9e33
5 E46N11
(-673",235") 		E48-E43
(5) 		0.1 -0.5 -2.6e31

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 19-Apr-2017 19:30 UT .