31 January 2019
⇐20190130 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190201⇒

NOAA
1 Active Region
12733

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 W26S14
(411",-143") 		E20-W65
(85) 		14.5 -0.5 -1.9e21
2 E12S72
(-65",-889") 		E75-W85
(160) 		2.3 -0.9 -3.7e21
3 E32N05
(-515",166") 		E42-E25
(17) 		0.8 -0.8 -2.0e20
4 W54S68
(295",-877") 		W44-W69
(25) 		0.1 -1.4 -2.6e20

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-2019 20:30 UT .