28 May 2018
⇐20180527 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180529⇒

NOAA
3 Active Regions
12711
12712
12710

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 E17S18
(-261",-276") 		E40-W24
(64) 		7.2 -1.0 -1.8e33
2 W13S59
(111",-807") 		E61-W77
(138) 		4.3 -0.9 -4.2e33
3 W38N65
(249",862") 		E46-W63
(109) 		1.8 0.9 4.7e33
4 W41S31
(526",-481") 		W36-W46
(10) 		0.1 -0.6 -5.4e31

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 28-May-2018 15:30 UT .