1 June 2021
⇐20210531 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210602⇒

NOAA
3 Active Regions
12827
12828
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 W28S06
(438",-99") 		W02-W49
(47) 		7.7 0.1 1.2e20
2 W21N29
(303",463") 		W01-W34
(33) 		3.2 0.1 8.7e19
3 W08N67
(54",875") 		E62-W57
(119) 		1.9 0.8 5.8e20
4 E08S10
(-135",-154") 		21
(2.7e04) 		-0.3 3.2 8.7e20
5 E44S16
(-634",-257") 		E52-E33
(19) 		1.0 -1.4 -3.2e20
6 E43S54
(-382",-762") 		E49-E40
(9) 		0.3 -0.8 -8.4e19
7 E50S27
(-643",-424") 		E52-E47
(5) 		0.1 -1.1 -1.7e19
8 W34N26
(483",419") 		W32-W37
(5) 		0.0 -1.1 -1.1e19
9 W38S16
(564",-262") 		W36-W41
(5) 		0.0 -1.3 -9.8e18

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-Jun-2021 19:30 UT .