26 January 2021
⇐20210125 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210127⇒

NOAA
3 Active Regions
12797
12799
12798

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 E21N54
(-202",841") 		E60-W35
(95) 		3.1 0.8 7.9e20
2 E27S16
(-423",-183") 		E43-E07
(36) 		2.6 -1.4 -6.3e20
3 E49S47
(-500",-672") 		E54-E40
(14) 		0.3 -0.3 -2.5e19
4 W45N60
(343",874") 		W34-W62
(28) 		0.1 0.9 8.0e19
5 W20N18
(322",388") 		W16-W24
(8) 		0.1 -1.1 -2.4e19
6 E46S40
(-534",-573") 		E48-E42
(6) 		0.1 -0.5 -1.1e19
7 E00N37
(-1",666") 		E04-W04
(8) 		0.1 -2.3 -2.9e19
8 E42S82
(-93",-950") 		E58-E22
(36) 		0.0 -0.5 -2.1e19
9 W09N31
(133",582") 		W08-W11
(3) 		0.0 -1.3 -9.5e18

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 26-Jan-2021 20:30 UT .