3 August 2021
⇐20210802 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210804⇒

NOAA
1 Active Region
12850

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 E23S15
(-361",-336") 		E48-W18
(66) 		8.7 -0.7 -1.1e21
2 W04N59
(36",757") 		E79-W80
(159) 		5.9 1.0 1.5e21
3 E13S71
(-67",-922") 		E18-E04
(14) 		0.1 -0.7 -3.0e19
4 E55N12
(-765",134") 		E59-E51
(8) 		0.1 -1.1 -1.6e19

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-Aug-2021 19:30 UT .