2 May 2021
⇐20210501 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210503⇒

NOAA
2 Active Regions
12818
12820

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 E03N08
(-48",204") 		E47-W43
(90) 		18.4 -0.0 -7.8e18
2 W31S32
(420",-456") 		W17-W41
(24) 		1.0 1.7 3.5e20
3 W18N71
(97",919") 		E42-W58
(100) 		0.5 0.8 2.4e20
4 E43S32
(-556",-463") 		E46-E39
(7) 		0.1 -2.4 -7.1e19
5 E39S25
(-549",-354") 		E42-E37
(5) 		0.1 -1.2 -1.8e19
6 E51S74
(-200",-903") 		E67-E50
(17) 		0.1 -0.4 -1.5e19
7 W09S20
(136",-259") 		W07-W11
(4) 		0.1 -1.4 -1.2e19
8 E49S05
(-718",-34") 		E51-E47
(4) 		0.0 -1.1 -1.2e19
9 W37S09
(567",-94") 		W35-W39
(4) 		0.0 -0.9 -6.7e18
10 W23N21
(343",392") 		W21-W24
(3) 		0.0 -0.7 -5.1e18

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 2-May-2021 23:30 UT .