3 February 2021
⇐20210202 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210204⇒

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 E20S00
(-341",97") 		E44-W19
(63) 		12.9 0.5 1.1e21
2 W45S73
(206",-901") 		E05-W86
(91) 		0.8 -0.7 -2.6e20
3 E45S22
(-646",-287") 		E56-E37
(19) 		0.3 0.5 3.6e19
4 W35N08
(555",218") 		W32-W38
(6) 		0.1 -0.6 -1.2e19
5 W14N31
(207",585") 		W12-W17
(5) 		0.1 -1.2 -1.4e19
6 W51N18
(719",358") 		W48-W53
(5) 		0.0 -1.3 -1.7e19

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 3-Feb-2021 20:30 UT .