20 April 2017
⇐20170419 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170421⇒

NOAA
2 Active Regions
12651
12650

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 E29S16
(-448",-196") 		E54-E01
(53) 		8.1 -0.6 -1.4e33
2 W54S18
(739",-244") 		W44-W62
(18) 		1.1 1.2 1.1e33
3 W41N65
(265",888") 		E05-W64
(69) 		0.9 0.8 3.9e33
4 E59S38
(-645",-548") 		E74-E44
(30) 		0.8 -0.6 -6.4e32
5 W53S70
(256",-879") 		W37-W82
(45) 		0.3 -1.0 -1.0e33
6 W05S31
(70",-423") 		E00-W08
(8) 		0.1 -0.9 -2.6e31

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 20-Apr-2017 13:30 UT .