19 February 2021
⇐20210218 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210220⇒

NOAA
1 Active Region
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 W23S54
(220",-717") 		E76-W39
(115) 		9.1 -2.2 -4.8e21
2 W10N25
(156",513") 		W07-W13
(6) 		0.1 -0.7 -1.8e19
3 E04N20
(-56",446") 		E05-E01
(4) 		0.0 -0.8 -6.5e18
4 W06N04
(105",186") 		W05-W07
(2) 		0.0 1.7 1.2e19
5 E02N12
(-31",324") 		E03-W01
(4) 		0.0 -1.9 -1.2e19
6 W24S07
(396",-3") 		W23-W26
(3) 		0.0 -1.3 -8.1e18

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 19-Feb-2021 20:30 UT .