27 April 2020
⇐20200426 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200428⇒

NOAA
1 Active Region
12760

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 W23N07
(372",180") 		E04-W41
(45) 		6.2 0.2 4.2e20
2 E04S68
(-24",-852") 		E82-W82
(164) 		3.3 -0.9 -4.2e21
3 E53S57
(-413",-772") 		E60-E35
(25) 		0.4 -0.6 -4.7e20
4 W37S50
(371",-686") 		W32-W38
(6) 		0.1 -1.2 -1.2e20
5 W41N15
(600",308") 		W37-W44
(7) 		0.1 1.5 7.0e19
6 E36N04
(-556",118") 		E39-E33
(6) 		0.1 -0.9 -2.3e19
7 E25N16
(-386",334") 		E28-E22
(6) 		0.1 -1.1 -2.4e19

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 27-Apr-2020 19:30 UT .