18 April 2012
⇐20120417 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120419⇒

NOAA
6 Active Regions
11455
11459
11460
11461
11462
11463

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E25N45
(-287",735") 		E40-E17
(23) 		0.5 2.9 1.2e33
2 E23S10
(-364",-78") 		E27-E19
(8) 		0.2 -0.9 -5.2e31
3 E46N10
(-673",229") 		E51-E39
(12) 		0.2 -25.7 -3.5e33

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-Apr-2012 23:00 UT .