9 April 2023
⇐20230408 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20230410⇒

NOAA
4 Active Regions
13270
13272
13269
13271

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 E28S50
(-288",-673") 		E39-E19
(20) 		0.5 1.2 1.3e20
2 E36N31
(-487",559") 		E45-E33
(12) 		0.3 5.9 4.0e20
3 W00N22
(3",445") 		E05-W05
(10) 		0.2 9.0 2.7e20
4 E04S43
(-53",-583") 		E06-E02
(4) 		0.0 5.4 3.8e19

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 9-Apr-2023 23:30 UT .