15 December 2018
⇐20181214 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20181216⇒

NOAA
2 Active Regions
12731
12730

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 E13S26
(-195",-408") 		E28-W18
(46) 		8.3 -0.3 -7.4e20
2 W21S61
(164",-849") 		E70-W51
(121) 		3.5 -1.0 -4.7e21
3 W33S18
(507",-292") 		W04-W56
(52) 		2.8 -0.2 -2.0e20
4 W11N65
(80",889") 		E74-W52
(126) 		2.1 0.8 3.2e21
5 W22N06
(363",116") 		W20-W24
(4) 		0.0 -0.8 -1.0e19
6 W19N53
(196",787") 		W17-W22
(5) 		0.0 1.1 4.4e19

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 15-Dec-2018 20:30 UT .