22 April 2012
⇐20120421 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120423⇒

NOAA
7 Active Regions
11459
11460
11461
11462
11463
11465
11466

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E10N23
(-150",451") 		E16-E01
(15) 		0.7 -13.2 -2.7e33
2 E53S70
(-255",-879") 		E74-E23
(51) 		0.4 0.6 8.8e32
3 W15N47
(169",750") 		W09-W21
(12) 		0.2 2.9 4.2e32
4 E13S01
(-217",71") 		E15-E11
(4) 		0.1 -2.7 -3.8e31

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 22-Apr-2012 23:00 UT .