18 April 2019
⇐20190417 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190419⇒

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 E21S26
(-312",-336") 		E35-E02
(33) 		5.9 -0.5 -7.7e20
2 E43S29
(-576",-399") 		E62-E33
(29) 		1.8 -0.6 -5.9e20
3 E33S69
(-181",-865") 		E67-W43
(110) 		1.8 -0.9 -3.5e21
4 W39N63
(273",879") 		E18-W44
(62) 		1.2 0.7 3.3e21
5 W51S75
(189",-907") 		W28-W63
(35) 		0.1 -0.9 -4.0e20
6 W12S52
(127",-696") 		W07-W16
(9) 		0.1 -0.8 -3.3e19

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-Apr-2019 22:00 UT .