29 January 2021
⇐20210128 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210130⇒

NOAA
3 Active Regions
12797
12798
12800

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 E00S46
(-5",-631") 		E57-W28
(85) 		5.7 -1.9 -2.1e21
2 E22N03
(-360",137") 		E37-E04
(33) 		2.6 -0.0 -9.0e18
3 W27N59
(232",876") 		E18-W63
(81) 		1.8 0.8 6.3e20
4 E56S15
(-778",-199") 		E63-E49
(14) 		0.5 2.0 2.6e20
5 E19N12
(-315",292") 		E22-E16
(6) 		0.2 -1.8 -4.8e19
6 E05N15
(-85",341") 		E08-E02
(6) 		0.1 -1.5 -2.3e19

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 29-Jan-2021 20:30 UT .