18 February 2012
⇐20120217 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120219⇒

NOAA
5 Active Regions
11416
11418
11419
11420
11421

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E53S32
(-657",-448") 		E65-E31
(34) 		2.0 4.1 6.9e33
2 E23S09
(-380",-52") 		E36-E08
(28) 		1.4 -0.2 -7.0e31
3 W42S40
(501",-558") 		W24-W65
(41) 		1.2 -1.9 -1.5e33
4 W32S10
(511",-66") 		W21-W41
(20) 		1.1 -0.9 -3.5e32
5 E21S42
(-261",-559") 		E26-E17
(9) 		0.1 -0.7 -4.1e31

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 18-Feb-2012 22:00 UT .