1 April 2021
⇐20210331 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210402⇒

NOAA
2 Active Regions
12811
12812

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 W11N11
(183",280") 		E29-W39
(68) 		15.1 0.3 6.3e20
2 E25S25
(-365",-319") 		E35-E15
(20) 		1.0 1.8 3.0e20
3 W40S75
(163",-899") 		E41-W54
(95) 		0.9 -0.9 -4.1e20
4 E16S33
(-225",-427") 		E18-E14
(4) 		0.0 -0.9 -6.0e18

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 1-Apr-2021 19:30 UT .