20 February 2021
⇐20210219 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210221⇒

NOAA
2 Active Regions
12803
12802

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 W30S65
(201",-834") 		E85-W55
(140) 		4.2 -1.2 -1.7e21
2 W34S27
(484",-354") 		W02-W50
(48) 		4.0 -3.4 -2.6e21
3 E23S05
(-378",25") 		E37-E12
(25) 		1.5 0.1 2.0e19

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 20-Feb-2021 20:30 UT .