23 October 2021
⇐20211022 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211024⇒

NOAA
2 Active Regions
12886
12887

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 E13N66
(-91",844") 		E81-W86
(167) 		3.7 1.0 1.2e21
2 W13N04
(225",-12") 		E06-W24
(30) 		1.8 0.1 2.8e19
3 W24S31
(339",-564") 		W20-W29
(9) 		0.1 -1.9 -5.8e19

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 23-Oct-2021 23:30 UT .