1 January 2021
⇐20201231 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210102⇒

NOAA
2 Active Regions
12794
12795

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 E15N18
(-235",354") 		E27-E02
(25) 		1.7 -0.2 -5.3e19
2 E03S18
(-50",-246") 		E08-W05
(13) 		0.9 -4.7 -7.0e20
3 E38S70
(-210",-900") 		54
(4.3e04) 		-0.8 3.3 1.4e21
4 W36N68
(216",918") 		W14-W66
(52) 		0.5 0.9 2.5e20
5 E32N25
(-473",452") 		E34-E30
(4) 		0.0 -2.0 -2.0e19
6 E18N26
(-276",469") 		E20-E16
(4) 		0.0 -2.1 -1.6e19

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 1-Jan-2021 20:30 UT .