25 January 2021
⇐20210124 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210126⇒

NOAA
3 Active Regions
12797
12799
12798

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 E34N64
(-239",907") 		E50-W15
(65) 		1.1 1.0 5.9e20
2 E45S20
(-651",-270") 		E55-E34
(21) 		0.7 -2.0 -3.0e20
3 W61S69
(312",-886") 		W30-W85
(55) 		0.7 -1.0 -3.8e20
4 W35N64
(244",906") 		W14-W61
(47) 		0.4 0.8 2.1e20
5 E36N41
(-431",697") 		E42-E28
(14) 		0.4 0.6 6.7e19
6 W52S23
(704",-326") 		W44-W55
(11) 		0.3 -5.4 -4.1e20
7 E37S08
(-588",-60") 		E41-E33
(8) 		0.2 -1.2 -5.1e19
8 E15N37
(-196",656") 		E22-E07
(15) 		0.2 -0.8 -3.7e19
9 W05N17
(88",375") 		W02-W08
(6) 		0.1 -1.3 -3.1e19
10 E05N05
(-88",186") 		E09-E02
(7) 		0.1 -1.0 -1.6e19
11 W17N40
(221",692") 		W15-W20
(5) 		0.1 0.4 1.1e19
12 W18N11
(298",280") 		W16-W21
(5) 		0.1 -1.0 -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 25-Jan-2021 20:30 UT .