18 September 2018
⇐20180917 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180919⇒

NOAA
1 Active Region
12722

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 E27N56
(-243",726") 		E80-W10
(90) 		5.1 0.8 3.1e21
2 E28N03
(-455",-54") 		39
(1.0e05) 		-0.3 5.4 5.4e21
3 E08S64
(-60",-904") 		E47-W34
(81) 		0.8 -0.8 -1.9e21
4 W46S12
(677",-284") 		W33-W58
(25) 		0.7 -0.6 -3.0e20
5 W38S20
(550",-411") 		W29-W50
(21) 		0.7 -0.9 -3.1e20
6 W21S47
(236",-774") 		W09-W34
(25) 		0.6 -0.3 -1.9e20
7 W52S27
(676",-489") 		W46-W56
(10) 		0.3 -0.6 -2.0e20
8 E35S16
(-530",-352") 		E37-E33
(4) 		0.0 -0.9 -2.1e19
9 E53N14
(-744",155") 		E55-E51
(4) 		0.0 -1.2 -4.0e19

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-Sep-2018 23:10 UT .