31 January 2018
⇐20180130 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180201⇒

NOAA
1 Active Region
12697

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 E15N48
(-169",790") 		E63-W62
(125) 		6.8 0.6 3.7e33
2 W31S69
(179",-873") 		E77-W64
(141) 		2.7 -1.1 -5.2e33
3 W22S07
(362",-25") 		W19-W26
(7) 		0.1 2.0 6.0e31

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 31-Jan-2018 20:30 UT .