2 September 2021
⇐20210901 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210903⇒

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 W08N39
(98",497") 		E90-W58
(148) 		19.8 -0.1 -5.2e20
2 E45S39
(-531",-655") 		E67-E34
(33) 		0.8 -1.0 -2.8e20
3 E21N39
(-270",502") 		E24-E19
(5) 		0.1 -0.8 -9.3e18

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 2-Sep-2021 23:30 UT .