27 February 2021
⇐20210226 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210228⇒

NOAA
3 Active Regions
12804
12803
12805

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 E05S51
(-48",-672") 		E88-W15
(103) 		5.7 -1.5 -1.8e21
2 E46S17
(-670",-198") 		E61-E29
(32) 		2.8 0.9 5.3e20
3 E21N09
(-349",263") 		E35-E07
(28) 		1.6 -0.1 -2.8e19
4 W17N57
(156",873") 		E21-W53
(74) 		1.2 0.7 2.9e20
5 W29S07
(473",-19") 		W22-W35
(13) 		0.5 -0.9 -6.9e19
6 E07N04
(-115",189") 		E11-E03
(8) 		0.2 -1.7 -4.5e19
7 E60N08
(-835",198") 		E64-E56
(8) 		0.1 -0.4 -9.0e18

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 27-Feb-2021 02:30 UT .