29 April 2018
⇐20180428 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180430⇒

NOAA
2 Active Regions
12706
12707

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 E01N49
(-9",770") 		E66-W44
(110) 		6.9 0.6 3.1e33
2 W17S66
(116",-838") 		E62-W83
(145) 		4.1 -1.1 -6.0e33
3 W16N14
(252",302") 		W02-W23
(21) 		1.5 0.2 6.1e31
4 E51S06
(-734",-60") 		E63-E41
(22) 		0.7 -2.4 -1.2e33

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 29-Apr-2018 15:30 UT .