2 January 2021
⇐20210101 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210103⇒

NOAA
2 Active Regions
12794
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 W06N19
(92",367") 		E08-W15
(23) 		1.3 -0.9 -2.0e20
2 W19S19
(294",-268") 		W07-W31
(24) 		1.2 -3.6 -6.8e20
3 E28S70
(-156",-902") 		E77-W23
(100) 		0.8 -0.6 -2.3e20
4 E08N37
(-104",633") 		E12-E03
(9) 		0.2 -2.0 -8.0e19
5 W11S61
(87",-828") 		E01-W16
(17) 		0.2 -0.5 -2.7e19
6 W35N06
(560",154") 		W33-W39
(6) 		0.0 -1.6 -1.2e19

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 2-Jan-2021 20:30 UT .