17 April 2018
⇐20180416 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180418⇒

NOAA
2 Active Regions
12704
12705

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 W21S24
(312",-318") 		E20-W42
(62) 		13.5 -0.5 -1.9e33
2 E30S68
(-173",-857") 		E84-W81
(165) 		2.3 -1.0 -4.2e33
3 E22S04
(-360",19") 		E27-E16
(11) 		0.2 -0.8 -4.4e31
4 E10S21
(-153",-253") 		E12-E08
(4) 		0.1 -1.6 -2.5e31
5 E35S22
(-505",-289") 		E37-E31
(6) 		0.1 -1.6 -3.5e31

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-Apr-2018 15:30 UT .