17 December 2018
⇐20181216 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20181218⇒

NOAA
2 Active Regions
12730
12731

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 W21S27
(307",-432") 		E07-W43
(50) 		5.7 -0.4 -7.3e20
2 E15N66
(-103",897") 		E70-W59
(129) 		2.0 0.7 2.8e21
3 W29S68
(175",-898") 		E65-W58
(123) 		1.6 -1.1 -4.4e21
4 E35S01
(-554",-4") 		E45-E21
(24) 		0.8 -1.0 -2.9e20
5 W22S46
(253",-684") 		W15-W28
(13) 		0.3 -0.6 -1.2e20
6 W09N20
(136",350") 		W07-W10
(3) 		0.0 -1.2 -1.3e19
7 W28N25
(412",436") 		W27-W30
(3) 		0.0 -0.6 -9.9e18

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 17-Dec-2018 20:30 UT .