30 August 2018
⇐20180829 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180831⇒

NOAA
1 Active Region
12720

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 E02N67
(-12",820") 		E65-W87
(152) 		5.3 1.2 7.2e21
2 W38N14
(565",132") 		W28-W49
(21) 		0.9 -0.8 -2.8e20
3 W31S30
(421",-565") 		W25-W36
(11) 		0.3 0.5 9.6e19
4 W21N03
(339",-58") 		W18-W24
(6) 		0.1 -1.0 -1.9e19
5 W58S19
(765",-362") 		W55-W62
(7) 		0.1 -0.9 -8.7e19
6 W09N32
(126",400") 		W05-W12
(7) 		0.1 -0.8 -1.3e19
7 W27N26
(388",323") 		W24-W30
(6) 		0.1 -1.4 -2.7e19
8 E63N00
(-850",-51") 		E66-E61
(5) 		0.0 -2.5 -1.8e20

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 30-Aug-2018 23:10 UT .