18 January 2015
⇐20150117 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150119⇒

NOAA
5 Active Regions
12259
12261
12263
12258
12264

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E35N45
(-391",741") 		E60-E02
(58) 		3.7 0.7 3.0e33
2 E45S64
(-307",-845") 		E84-W11
(95) 		3.2 -0.5 -3.0e33
3 W45N09
(678",203") 		W36-W54
(18) 		1.0 -4.4 -2.5e33
4 W30S26
(440",-355") 		W22-W37
(15) 		0.5 -9.6 -1.9e33

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 18-Jan-2015 22:35 UT .