28 February 2021
⇐20210227 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210301⇒

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 E28S03
(-459",51") 		E52-W09
(61) 		7.9 0.5 6.3e20
2 W27S54
(259",-714") 		E20-W38
(58) 		3.8 -1.8 -1.7e21
3 E35S27
(-497",-354") 		E51-E24
(27) 		0.8 1.2 1.9e20
4 E53N03
(-769",118") 		E55-E50
(5) 		0.1 -0.8 -1.1e19
5 W18N10
(298",277") 		W16-W21
(5) 		0.0 -2.3 -1.8e19
6 E02S04
(-37",49") 		E03-E01
(2) 		0.0 -2.2 -1.4e19
7 E02N03
(-36",170") 		E04-W00
(4) 		0.0 -1.2 -7.0e18
8 W28N09
(450",252") 		W26-W30
(4) 		0.0 -2.2 -1.5e19

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 28-Feb-2021 20:30 UT .