21 January 2013
⇐20130120 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20130122⇒

NOAA
3 Active Regions
11654
11658
11660

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E27S44
(-316",-617") 		E55-E00
(55) 		3.0 -3.4 -5.3e33
2 E12S20
(-190",-261") 		E18-E06
(12) 		0.7 -4.8 -7.7e32
3 E31N35
(-418",615") 		E35-E27
(8) 		0.1 -0.9 -6.7e31
4 E35N04
(-562",136") 		E39-E32
(7) 		0.1 -2.0 -7.8e31

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 21-Jan-2013 22:00 UT .