19 April 2019
⇐20190418 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190420⇒

NOAA
2 Active Regions
12738
12739

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 E22S29
(-311",-387") 		E50-W14
(64) 		7.7 -0.5 -1.2e21
2 E21S70
(-119",-864") 		E74-W75
(149) 		2.3 -1.0 -4.2e21
3 E17S02
(-282",54") 		E26-W02
(28) 		2.2 -0.4 -2.1e20
4 E32N63
(-229",880") 		E58-W04
(62) 		0.8 0.8 1.9e21
5 W36N65
(234",894") 		W17-W50
(33) 		0.4 0.7 1.4e21
6 E35S08
(-547",-63") 		E41-E30
(11) 		0.4 -0.8 -1.1e20
7 W26S52
(253",-708") 		W20-W32
(12) 		0.1 -0.7 -6.6e19

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 19-Apr-2019 22:00 UT .