28 January 2021
⇐20210127 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210129⇒

NOAA
4 Active Regions
12797
12800
12798
12799

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 E04S18
(-58",-214") 		E28-W22
(50) 		5.0 -1.9 -1.5e21
2 W11N55
(106",852") 		E31-W40
(71) 		3.1 0.6 6.0e20
3 E33S58
(-286",-778") 		E39-E43
(-4) 		1.6 -0.7 -3.1e20
4 E34N04
(-550",155") 		E39-E31
(8) 		0.1 -0.6 -1.5e19

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 28-Jan-2021 12:30 UT .