20 August 2018
⇐20180819 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180821⇒

NOAA
2 Active Regions
12719
12718

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 W24S26
(342",-514") 		W07-W36
(29) 		2.8 -0.5 -6.4e20
2 W01S28
(21",-547") 		E13-W12
(25) 		2.4 -0.3 -2.4e20
3 E43N61
(-310",786") 		E84-E49
(35) 		2.2 1.2 3.6e21
4 W45S02
(673",-116") 		W37-W57
(20) 		1.0 -0.8 -4.1e20
5 E14N34
(-187",435") 		E22-W01
(23) 		0.7 2.3 4.9e20
6 E24S40
(-301",-681") 		E29-E18
(11) 		0.3 -0.6 -1.2e20
7 W32N20
(475",239") 		W27-W38
(11) 		0.3 -5.1 -4.6e20
8 E43S61
(-314",-864") 		E47-E33
(14) 		0.2 -0.5 -6.0e20
9 E16S23
(-247",-472") 		E23-E11
(12) 		0.2 -0.7 -4.6e19
10 E21S68
(-130",-913") 		E28-E12
(16) 		0.2 -1.3 -1.2e21
11 W38S63
(264",-880") 		W26-W44
(18) 		0.1 -0.8 -5.6e20

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-Aug-2018 23:10 UT .