1 September 2021
⇐20210831 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210902⇒

NOAA
3 Active Regions
12859
12860
12861

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 W02N43
(30",559") 		E51-W53
(104) 		19.9 -0.1 -3.4e20
2 E59S36
(-654",-610") 		E66-E51
(15) 		0.3 -1.0 -1.5e20
3 E31S11
(-476",-289") 		E35-E26
(9) 		0.1 -1.0 -1.5e19
4 E12N32
(-172",402") 		E15-E10
(5) 		0.0 -0.7 -4.4e18

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 1-Sep-2021 19:30 UT .