5 February 2021
⇐20210204 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210206⇒

NOAA
1 Active Region
12801

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 W08S02
(137",78") 		E42-W50
(92) 		16.1 0.4 9.8e20
2 E55S69
(-287",-880") 		E76-E41
(35) 		0.5 -0.6 -1.6e20
3 W34N17
(525",361") 		W26-W44
(18) 		0.5 -0.4 -4.5e19
4 W19N19
(298",411") 		W11-W25
(14) 		0.4 0.7 5.8e19
5 E39S81
(-93",-943") 		E72-E19
(53) 		0.1 -0.4 -2.5e19
6 W62S72
(270",-902") 		W60-W60
(3.5e03) 		-0.3 3.6 1.3e20
7 W42N26
(592",495") 		W39-W46
(7) 		0.1 0.6 9.0e18
8 E28N18
(-433",398") 		E30-E26
(4) 		0.0 -1.6 -1.5e19
9 W12S20
(186",-229") 		W10-W14
(4) 		0.0 -1.8 -1.4e19

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 5-Feb-2021 20:30 UT .