31 May 2021
⇐20210530 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210601⇒

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 W08N12
(127",204") 		E32-W34
(66) 		14.5 0.1 2.6e20
2 W10N66
(67",870") 		E63-W45
(108) 		1.9 0.7 5.4e20
3 W19S39
(233",-594") 		W13-W26
(13) 		0.3 1.8 1.2e20
4 E14N44
(-166",661") 		E18-E09
(9) 		0.3 -0.6 -3.0e19
5 W42N02
(639",35") 		W39-W45
(6) 		0.1 -0.5 -1.1e19
6 W30S26
(430",-403") 		W28-W34
(6) 		0.1 -1.8 -2.4e19
7 W09N41
(115",627") 		W06-W12
(6) 		0.1 -0.6 -7.2e18
8 E05N19
(-78",320") 		E06-E03
(3) 		0.1 -0.8 -7.5e18
9 E57S43
(-579",-643") 		E59-E54
(5) 		0.0 -0.9 -1.3e19
10 W07S13
(116",-207") 		W06-W09
(3) 		0.0 -2.3 -1.4e19
11 W10N51
(100",742") 		W06-W13
(7) 		0.0 -0.8 -7.1e18

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 31-May-2021 19:30 UT .