4 January 2021
⇐20210103 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210105⇒

NOAA
1 Active Region
12795

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 E11N22
(-178",413") 		E30-W13
(43) 		4.9 -0.0 -3.2e19
2 W13S74
(60",-919") 		E31-W50
(81) 		0.9 -0.9 -3.8e20
3 W28N22
(423",409") 		W21-W33
(12) 		0.5 -1.8 -1.8e20
4 W20N38
(265",640") 		W17-W23
(6) 		0.1 -3.3 -5.6e19
5 W41S15
(625",-214") 		W39-W44
(5) 		0.1 -3.2 -3.5e19
6 E51N22
(-700",402") 		E54-E48
(6) 		0.0 -0.3 -3.9e18
7 E45S04
(-692",-31") 		E47-E43
(4) 		0.0 -1.1 -9.9e18
8 W40S20
(591",-284") 		W38-W42
(4) 		0.0 -7.6 -5.6e19

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-Jan-2021 20:30 UT .