19 May 2018
⇐20180518 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180520⇒

NOAA
1 Active Region
12709

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 W01N45
(15",694") 		E61-W27
(88) 		7.9 0.6 2.9e33
2 E18S69
(-107",-871") 		E72-W63
(135) 		2.2 -1.0 -4.5e33
3 E25N46
(-274",711") 		E33-E20
(13) 		0.1 -0.6 -6.8e31
4 W02S20
(39",-285") 		E02-W04
(6) 		0.1 1.9 3.5e31
5 E13S30
(-184",-441") 		E15-E09
(6) 		0.1 -1.1 -2.1e31
6 W24S12
(384",-172") 		W23-W26
(3) 		0.0 -1.0 -1.2e31

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 19-May-2018 15:30 UT .