23 February 2012
⇐20120222 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120224⇒

NOAA
4 Active Regions
11420
11421
11422
11423

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E31S58
(-266",-766") 		E65-W10
(75) 		4.4 0.6 2.6e33
2 W22S26
(329",-326") 		W08-W36
(28) 		2.2 7.8 4.9e33
3 E18N45
(-216",764") 		E36-W30
(66) 		2.1 1.1 2.0e33
4 E57N13
(-798",277") 		E61-E53
(8) 		0.1 -10.3 -1.1e33

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 23-Feb-2012 22:00 UT .