15 April 2021
⇐20210414 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210416⇒

NOAA
1 Active Region
12814

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 E12S54
(-120",-718") 		E59-W46
(105) 		11.2 -1.2 -3.1e21
2 E55S13
(-765",-162") 		E65-E45
(20) 		0.5 -0.7 -1.0e20
3 W37S13
(564",-139") 		W32-W44
(12) 		0.4 -2.4 -1.8e20
4 W08N72
(43",933") 		E11-W20
(31) 		0.1 1.2 1.2e20
5 W25N03
(399",136") 		W20-W28
(8) 		0.1 -0.9 -1.6e19
6 W30N02
(474",116") 		W27-W33
(6) 		0.1 -1.0 -1.5e19
7 W17N01
(285",111") 		W16-W19
(3) 		0.0 4.4 2.7e19

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 15-Apr-2021 23:30 UT .