30 January 2021
⇐20210129 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210131⇒

NOAA
3 Active Regions
12797
12798
12800

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 E14N03
(-241",145") 		E29-W10
(39) 		3.9 -0.1 -5.5e19
2 W18S27
(271",-354") 		W07-W28
(21) 		1.9 -3.6 -1.2e21
3 E06S72
(-30",-894") 		E46-W84
(130) 		1.8 -1.0 -7.1e20
4 E42S18
(-626",-225") 		E48-E33
(15) 		1.0 2.2 4.3e20
5 W08S44
(93",-609") 		E02-W13
(15) 		0.7 -0.6 -7.3e19
6 W33N66
(216",919") 		E07-W55
(62) 		0.5 0.9 3.0e20

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 30-Jan-2021 20:30 UT .