25 December 2020
⇐20201224 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20201226⇒

NOAA
3 Active Regions
12794
12795
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 W12N15
(202",283") 		W03-W18
(15) 		1.5 0.0 3.3e18
2 W48N65
(304",897") 		E39-W75
(114) 		1.4 1.1 1.0e21
3 E04S73
(-18",-919") 		E66-W66
(132) 		1.0 -0.9 -4.2e20
4 W38N02
(602",61") 		W28-W50
(22) 		0.9 0.6 1.0e20
5 E02S17
(-25",-253") 		E06-W07
(13) 		0.8 -4.6 -6.0e20
6 W20S05
(339",-48") 		W19-W22
(3) 		0.0 4.3 3.0e19
7 W43N13
(644",249") 		W41-W44
(3) 		0.0 -1.9 -1.4e19

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 25-Dec-2020 20:30 UT .