4 May 2021
⇐20210503 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210505⇒

NOAA
0 Active Regions

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 W07N09
(117",218") 		E36-W42
(78) 		20.7 0.1 3.1e20
2 E10S41
(-126",-584") 		E23-W15
(38) 		2.7 -0.4 -2.2e20
3 E36S64
(-243",-835") 		E44-E06
(38) 		1.8 -1.1 -7.4e20
4 W52S36
(607",-528") 		W41-W62
(21) 		0.5 1.2 1.6e20
5 E33N28
(-460",495") 		E40-E28
(12) 		0.4 0.7 5.8e19
6 W22N35
(294",591") 		W18-W26
(8) 		0.1 -0.6 -1.2e19
7 W15S23
(231",-311") 		W12-W18
(6) 		0.1 -2.1 -3.3e19
8 W46N04
(679",112") 		W42-W50
(8) 		0.1 -1.3 -2.5e19

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-May-2021 23:30 UT .