21 February 2012
⇐20120220 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120222⇒

NOAA
4 Active Regions
11419
11420
11421
11422

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E26S45
(-298",-611") 		E55-W10
(65) 		5.5 2.8 8.0e33
2 E37N46
(-413",756") 		E56-W05
(61) 		1.5 1.4 2.8e33
3 W22S06
(358",8") 		W17-W26
(9) 		0.3 -1.3 -8.2e31
4 W17S35
(237",-458") 		W14-W21
(7) 		0.1 -3.1 -8.3e31
5 W14S11
(226",-63") 		W11-W15
(4) 		0.0 -3.1 -2.5e31
6 W24S24
(359",-287") 		W22-W26
(4) 		0.0 4.1 4.3e31

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-Feb-2012 22:00 UT .