29 August 2018
⇐20180828 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180830⇒

NOAA
2 Active Regions
12720
12719

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 W25S25
(370",-492") 		W03-W43
(40) 		5.9 -0.2 -5.9e20
2 E04N67
(-28",823") 		E70-W74
(144) 		5.2 1.2 7.3e21
3 W26S67
(161",-909") 		W10-W43
(33) 		0.2 -1.3 -1.4e21
4 W40N04
(611",-24") 		W35-W43
(8) 		0.1 -0.5 -1.8e19
5 W52N12
(738",123") 		W50-W55
(5) 		0.0 -1.0 -2.8e19

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 29-Aug-2018 23:10 UT .