28 May 2021
⇐20210527 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210529⇒

NOAA
3 Active Regions
12824
12826
12825

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 E28N12
(-429",220") 		E49-E08
(41) 		8.2 0.1 1.0e20
2 W15S13
(242",-193") 		E05-W30
(35) 		3.2 -0.1 -5.7e19
3 E08N63
(-58",850") 		E32-W17
(49) 		1.3 1.0 4.5e20
4 E19S40
(-241",-600") 		E23-E12
(11) 		0.3 1.6 1.1e20
5 W30S05
(473",-73") 		W28-W33
(5) 		0.1 0.9 1.5e19
6 W21N03
(343",73") 		W18-W25
(7) 		0.1 -0.9 -1.4e19

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 28-May-2021 23:30 UT .