29 April 2017
⇐20170428 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170430⇒

NOAA
4 Active Regions
12651
12653
12654
12652

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 E27S66
(-173",-845") 		E63-W42
(105) 		3.8 -1.1 -6.7e33
2 E26S05
(-411",-13") 		E39-E13
(26) 		2.5 0.0 1.2e31
3 W22N63
(160",876") 		E40-W41
(81) 		1.3 0.6 1.9e33
4 W33N17
(490",339") 		W27-W38
(11) 		0.2 3.2 2.9e32
5 E34S48
(-351",-670") 		E40-E28
(12) 		0.1 -0.7 -4.4e31
6 W50S44
(523",-630") 		W42-W56
(14) 		0.1 -1.9 -1.7e32
7 E15N47
(-166",742") 		E18-E11
(7) 		0.0 -1.8 -4.9e31

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-2017 19:30 UT .