4 February 2013
⇐20130203 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20130205⇒

NOAA
5 Active Regions
11662
11663
11665
11667
11668

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W06N32
(93",598") 		E24-W28
(52) 		3.5 -2.9 -4.1e33
2 E39S37
(-486",-519") 		E59-E22
(37) 		2.1 3.9 4.7e33
3 E38S74
(-160",-910") 		E84-W16
(100) 		0.7 0.9 2.0e33
4 W39S15
(594",-174") 		W34-W46
(12) 		0.4 2.0 3.3e32
5 W08S28
(120",-369") 		W05-W11
(6) 		0.3 13.1 9.4e32
6 E16S18
(-251",-197") 		E20-E11
(9) 		0.2 17.3 7.9e32
7 W04N50
(49",807") 		E01-W08
(9) 		0.1 -0.9 -1.1e32
8 W31N03
(500",147") 		W29-W33
(4) 		0.0 -2.2 -2.8e31

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 4-Feb-2013 22:00 UT .