18 September 2012
⇐20120917 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120919⇒

NOAA
5 Active Regions
11569
11571
11573
11574
11575

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E05N07
(-90",3") 		E18-W09
(27) 		2.0 -1.7 -5.8e32
2 W26N34
(354",435") 		W20-W32
(12) 		0.6 -0.7 -1.6e32
3 W23S40
(287",-699") 		W09-W32
(23) 		0.5 1.5 5.5e32
4 W16N18
(255",187") 		W14-W20
(6) 		0.1 -7.0 -1.6e32
5 W64S17
(817",-333") 		W59-W68
(9) 		0.1 2.4 3.1e32

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-Sep-2012 21:00 UT .