21 March 2015
⇐20150320 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150322⇒

NOAA
4 Active Regions
12303
12304
12299
12301

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W31S70
(168",-866") 		E87-W77
(164) 		2.9 -0.8 -4.2e33
2 W04S19
(70",-205") 		E13-W14
(27) 		1.4 5.5 1.5e33
3 E16S05
(-267",27") 		E20-E11
(9) 		0.7 5.0 7.0e32
4 W71S40
(699",-580") 		W66-W77
(11) 		0.0 -2.9 -3.7e32

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 21-Mar-2015 22:35 UT .