21 March 2021
⇐20210320 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210322⇒

NOAA
2 Active Regions
12810
12808

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 W43S52
(408",-696") 		E64-W61
(125) 		8.6 -1.8 -4.3e21
2 E31S06
(-487",-6") 		E37-E25
(12) 		0.7 -0.7 -8.1e19
3 W20S13
(329",-112") 		W16-W24
(8) 		0.5 1.0 8.6e19
4 E45S19
(-648",-238") 		E57-E38
(19) 		0.4 -1.1 -1.0e20
5 E04S06
(-72",13") 		E06-E02
(4) 		0.0 -1.2 -6.4e18

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 21-Mar-2021 20:30 UT .