18 November 2021
⇐20211117 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211119⇒

NOAA
4 Active Regions
12894
12896
12897
12895

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 W02S46
(19",-732") 		E50-W34
(84) 		7.2 -1.3 -2.3e21
2 E16N06
(-267",70") 		E25-W05
(30) 		3.1 0.2 1.1e20
3 W18S10
(295",-211") 		W02-W29
(27) 		2.7 0.3 1.4e20
4 W49S37
(583",-604") 		W34-W62
(28) 		0.9 -0.9 -2.5e20
5 W35S02
(564",-72") 		W26-W42
(16) 		0.4 0.7 4.6e19
6 W61S21
(792",-372") 		W56-W66
(10) 		0.2 -1.4 -1.1e20
7 E54N51
(-493",742") 		E60-E47
(13) 		0.1 0.7 3.0e19
8 W09S22
(141",-400") 		W07-W11
(4) 		0.1 -1.3 -2.0e19
9 W28S12
(444",-240") 		W26-W30
(4) 		0.0 -1.1 -8.2e18

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 18-Nov-2021 20:30 UT .