21 January 2021
⇐20210120 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210122⇒

NOAA
3 Active Regions
12797
12798
12796

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 E00S67
(-1",-863") 		E54-W69
(123) 		3.2 -1.1 -1.1e21
2 E04S20
(-70",-243") 		E09-W07
(16) 		1.3 -4.4 -8.8e20
3 W14N66
(97",923") 		E47-W52
(99) 		0.9 0.9 4.1e20
4 W59N34
(688",585") 		W48-W64
(16) 		0.5 0.9 2.0e20

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 21-Jan-2021 20:30 UT .