17 February 2012
⇐20120216 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120218⇒

NOAA
4 Active Regions
11416
11418
11419
11420

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W20S11
(326",-78") 		E01-W34
(35) 		2.8 -1.7 -1.1e33
2 W37S39
(448",-541") 		W22-W62
(40) 		1.2 -2.5 -1.7e33
3 E62S26
(-774",-373") 		E70-E47
(23) 		0.6 5.5 4.7e33
4 W21N12
(339",306") 		W20-W22
(2) 		0.0 -3.1 -4.0e31

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 17-Feb-2012 22:00 UT .