18 April 2017
⇐20170417 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170419⇒

NOAA
1 Active Region
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 W32S20
(478",-250") 		W13-W61
(48) 		4.8 1.5 2.4e33
2 W17N60
(137",868") 		E53-W54
(107) 		2.4 0.5 2.2e33
3 E42S07
(-639",-52") 		E55-E29
(26) 		2.2 -1.6 -1.7e33
4 W54S71
(255",-882") 		W21-W85
(64) 		0.6 -0.6 -1.4e33
5 E59S20
(-774",-285") 		E65-E53
(12) 		0.2 -0.8 -2.0e32
6 E43N14
(-631",290") 		E45-E42
(3) 		0.0 -2.4 -5.4e31

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-2017 19:30 UT .