24 January 2021
⇐20210123 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210125⇒

NOAA
3 Active Regions
12797
12798
12799

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 W53S68
(288",-882") 		E50-W76
(126) 		1.3 -1.2 -8.0e20
2 W38S22
(557",-292") 		W29-W43
(14) 		0.8 -5.7 -8.6e20
3 W26N64
(183",912") 		W08-W44
(36) 		0.5 0.9 2.6e20
4 E10N17
(-155",375") 		E14-E01
(13) 		0.3 -1.4 -7.6e19
5 E59S20
(-784",-281") 		E68-E51
(17) 		0.3 -1.5 -1.2e20
6 E18N69
(-109",939") 		E33-W01
(34) 		0.3 1.3 2.0e20
7 E03N07
(-57",211") 		E05-W01
(6) 		0.1 1.7 3.7e19
8 E20S03
(-330",33") 		E22-E17
(5) 		0.1 -2.5 -2.7e19
9 E22N48
(-246",776") 		E26-E18
(8) 		0.1 0.3 4.9e18

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 24-Jan-2021 20:30 UT .