19 January 2021
⇐20210118 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210120⇒

NOAA
2 Active Regions
12797
12796

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 W36N43
(420",709") 		E47-W50
(97) 		7.5 0.7 1.6e21
2 W18S68
(115",-872") 		E54-W62
(116) 		3.4 -1.0 -1.2e21
3 W25S04
(412",7") 		W08-W40
(32) 		2.4 -0.2 -1.0e20
4 E30S17
(-475",-208") 		E37-E20
(17) 		1.0 -3.1 -5.9e20
5 E01N17
(-8",367") 		E03-W02
(5) 		0.1 -1.7 -2.6e19
6 E34S29
(-475",-408") 		E34-E33
(1) 		0.1 -5.7 -7.9e19
7 E04S34
(-58",-474") 		E06-E01
(5) 		0.0 -0.7 -4.7e18

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 19-Jan-2021 20:30 UT .