4 June 2021
⇐20210603 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210605⇒

NOAA
3 Active Regions
12827
12829
12828

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 W08S37
(111",-566") 		E27-W47
(74) 		10.4 -0.8 -1.6e21
2 E06N66
(-42",864") 		E72-W43
(115) 		2.2 1.0 7.9e20
3 W47S22
(648",-348") 		W42-W54
(12) 		0.2 -1.1 -5.5e19
4 E18N13
(-285",209") 		E22-E14
(8) 		0.1 -1.0 -2.3e19
5 E34S04
(-531",-57") 		E36-E32
(4) 		0.1 2.0 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 4-Jun-2021 23:30 UT .