20 May 2021
⇐20210519 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210521⇒

NOAA
3 Active Regions
12822
12824
12823

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 W18N09
(291",180") 		E07-W33
(40) 		3.5 -0.2 -1.4e20
2 W50S58
(388",-790") 		E61-W60
(121) 		3.2 -0.8 -1.0e21
3 E21N53
(-201",776") 		E30-W12
(42) 		3.1 0.6 5.7e20
4 E21N17
(-325",307") 		E33-E07
(26) 		2.2 0.3 1.0e20
5 W51S02
(743",-7") 		W41-W64
(23) 		1.5 -0.3 -1.0e20
6 W20N75
(85",922") 		1.0e04
(0.1) 		3.4 -3.3 -3.3e20

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 20-May-2021 19:30 UT .