27 January 2021
⇐20210126 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210128⇒

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 E06N54
(-61",844") 		E46-W50
(96) 		3.3 0.5 5.5e20
2 E21S21
(-327",-268") 		E37-E05
(32) 		2.1 -2.6 -9.3e20
3 E07N05
(-127",178") 		E18-W08
(26) 		1.4 -0.5 -1.2e20
4 E40S55
(-361",-751") 		E45-E54
(-9) 		1.0 -0.5 -1.5e20
5 W14N06
(237",192") 		W10-W18
(8) 		0.1 -1.5 -2.4e19
6 W03N41
(44",713") 		W01-W06
(5) 		0.0 -1.9 -2.1e19

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 27-Jan-2021 20:30 UT .