21 March 2012
⇐20120320 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120322⇒

NOAA
7 Active Regions
11432
11433
11434
11435
11438
11439
11440

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E20N46
(-229",763") 		E32-W04
(36) 		0.8 2.3 1.7e33
2 E39S77
(-135",-911") 		E72-E07
(65) 		0.4 0.6 9.3e32
3 W28N06
(445",211") 		W19-W34
(15) 		0.2 -0.9 -5.8e31
4 E50N07
(-734",196") 		E53-E47
(6) 		0.1 -7.7 -3.9e32

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-2012 22:00 UT .