21 October 2021
⇐20211020 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211022⇒

NOAA
1 Active Region
12886

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 E33N67
(-199",858") 		E62-W87
(149) 		2.9 0.7 8.0e20
2 W35S66
(226",-905") 		E04-W56
(60) 		0.6 -0.7 -2.5e20
3 E01S29
(-16",-541") 		E06-W06
(12) 		0.4 -3.7 -2.7e20
4 W64S25
(789",-434") 		W55-W67
(12) 		0.3 -1.6 -2.2e20
5 W39N04
(610",-6") 		W35-W44
(9) 		0.2 -0.5 -2.2e19
6 E38N41
(-441",582") 		E41-E35
(6) 		0.0 -1.1 -1.3e19

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 21-Oct-2021 23:30 UT .