22 February 2021
⇐20210221 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210223⇒

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 W56S65
(341",-844") 		W41-W76
(35) 		1.5 -1.0 -7.0e20
2 W54S29
(688",-399") 		W40-W68
(28) 		1.1 -3.0 -9.1e20
3 E20N64
(-145",913") 		E46-W43
(89) 		1.1 0.5 2.6e20
4 E57S32
(-688",-459") 		E71-E50
(21) 		0.7 -1.3 -2.5e20
5 E62S44
(-616",-628") 		E71-E58
(13) 		0.2 -0.6 -3.5e19
6 E02N26
(-36",533") 		E04-E00
(4) 		0.1 -1.0 -9.1e18

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 22-Feb-2021 20:30 UT .