4 February 2021
⇐20210203 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210205⇒

NOAA
1 Active Region
12801

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 E10N00
(-163",110") 		E50-W35
(85) 		15.3 0.4 8.8e20
2 W53S72
(243",-900") 		W37-W71
(34) 		0.4 -1.0 -2.0e20
3 E23S19
(-357",-220") 		E27-E20
(7) 		0.2 1.6 5.6e19
4 E64S66
(-351",-867") 		E76-E64
(12) 		0.1 -0.3 -2.3e19
5 W25N29
(363",551") 		W22-W29
(7) 		0.1 -0.7 -1.1e19
6 E47S81
(-115",-943") 		E82-E57
(25) 		0.1 -0.4 -1.7e19
7 W47S82
(103",-946") 		W25-W66
(41) 		0.0 -0.6 -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 4-Feb-2021 20:30 UT .