4 October 2015
⇐20151003 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20151005⇒

NOAA
4 Active Regions
12420
12422
12427
12426

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W34N56
(302",741") 		E22-W57
(79) 		5.7 0.6 2.9e33
2 E21N05
(-350",-23") 		E34-W00
(34) 		5.6 3.1 4.1e33
3 E56N38
(-628",535") 		E72-E35
(37) 		0.9 1.0 1.0e33
4 E27N41
(-336",548") 		E31-E22
(9) 		0.2 -0.7 -5.3e31

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 4-Oct-2015 18:30 UT .