31 December 2017
⇐20171230 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180101⇒

NOAA
1 Active Region
12692

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 W22N49
(244",770") 		E41-W46
(87) 		5.2 1.0 4.5e33
2 W04S69
(23",-890") 		E77-W66
(143) 		2.7 -1.3 -6.1e33
3 W22S29
(316",-426") 		W05-W33
(28) 		1.5 -0.1 -5.2e31
4 W39S17
(589",-252") 		W34-W45
(11) 		0.2 -0.5 -5.9e31
5 E22S18
(-347",-255") 		E24-E20
(4) 		0.1 -0.8 -1.3e31

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-Dec-2017 20:30 UT .