4 June 2020
⇐20200603 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200605⇒

NOAA
2 Active Regions
12765
12764

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 W15S01
(241",-20") 		E27-W42
(69) 		10.0 0.1 2.3e20
2 W18N58
(160",801") 		E18-W72
(90) 		2.0 0.9 1.9e21
3 W21S67
(130",-871") 		E53-W50
(103) 		1.8 -0.8 -3.1e21
4 W45S20
(626",-329") 		W39-W51
(12) 		0.3 -1.0 -1.8e20
5 W53S60
(373",-822") 		W61-W55
(-6) 		0.1 -0.7 -2.8e20
6 E32S17
(-480",-270") 		E35-E28
(7) 		0.1 -0.6 -2.1e19
7 E33N14
(-498",239") 		E35-E31
(4) 		0.1 -1.1 -2.6e19

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 4-Jun-2020 19:00 UT .