25 October 2021
⇐20211024 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211026⇒

NOAA
3 Active Regions
12886
12887
12888

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 W02N67
(12",853") 		E74-W85
(159) 		4.0 0.9 1.2e21
2 E24N13
(-381",142") 		E37-E05
(32) 		3.6 -0.0 -2.1e19

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 25-Oct-2021 23:30 UT .