23 April 2019
⇐20190422 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190424⇒

NOAA
1 Active Region
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 E15N15
(-234",317") 		E26-W08
(34) 		5.3 -0.5 -6.8e20
2 W24S28
(340",-379") 		W01-W39
(38) 		3.2 -0.7 -6.8e20
3 E10S69
(-56",-861") 		E56-W55
(111) 		2.6 -1.0 -4.0e21
4 W06N64
(41",893") 		E51-W33
(84) 		1.4 0.9 2.8e21
5 W55S29
(690",-418") 		W51-W61
(10) 		0.1 -1.2 -1.6e20
6 E11N33
(-153",583") 		E13-E09
(4) 		0.1 -0.7 -1.7e19
7 W34S39
(411",-549") 		W32-W36
(4) 		0.0 -0.9 -2.0e19
8 W43S35
(539",-497") 		W43-W46
(3) 		0.0 -1.1 -2.6e19

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 23-Apr-2019 22:00 UT .