19 December 2020
⇐20201218 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20201220⇒

NOAA
2 Active Regions
12792
12793

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 E04N48
(-41",741") 		E47-W35
(82) 		11.2 0.9 2.4e21
2 E28N07
(-458",145") 		E56-W11
(67) 		7.2 0.1 8.2e19
3 W42S67
(248",-894") 		E42-W57
(99) 		1.5 -1.0 -7.0e20
4 W46N05
(699",107") 		W41-W52
(11) 		0.2 0.5 2.6e19
5 W15N11
(248",205") 		W11-W20
(9) 		0.2 -0.9 -2.5e19
6 W32S47
(357",-694") 		W30-W35
(5) 		0.1 -1.4 -2.9e19
7 W31N08
(493",165") 		W27-W34
(7) 		0.1 -0.7 -9.2e18
8 W46N23
(645",396") 		W43-W48
(5) 		0.0 -1.3 -1.1e19

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 19-Dec-2020 20:30 UT .