18 February 2019
⇐20190217 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190219⇒

NOAA
0 Active Regions

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 W19S03
(324",65") 		W03-W35
(32) 		5.0 0.5 6.5e20
2 W37S71
(190",-881") 		E66-W56
(122) 		2.0 -1.3 -5.5e21
3 W29N63
(219",903") 		E31-W57
(88) 		1.3 0.8 3.7e21
4 W33S06
(534",-3") 		W27-W40
(13) 		0.6 0.9 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 18-Feb-2019 20:30 UT .