18 December 2020
⇐20201217 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20201219⇒

NOAA
2 Active Regions
12793
12792

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 E24N47
(-271",729") 		E61-W20
(81) 		10.6 0.8 2.3e21
2 W28N14
(440",256") 		W20-W38
(18) 		2.6 -0.2 -8.3e19
3 E33N11
(-525",213") 		E50-E12
(38) 		2.3 0.1 6.4e19
4 W21S66
(143",-885") 		E53-W47
(100) 		2.3 -1.2 -1.1e21
5 W43N08
(658",157") 		W38-W50
(12) 		0.3 0.8 5.7e19
6 W54N08
(778",154") 		W49-W60
(11) 		0.1 0.4 1.2e19
7 W12S44
(148",-666") 		W11-W14
(3) 		0.0 -0.5 -4.2e18

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 18-Dec-2020 20:30 UT .