17 May 2021
⇐20210516 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210518⇒

NOAA
2 Active Regions
12822
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 W23S40
(283",-578") 		E57-W46
(103) 		20.6 -0.6 -2.6e21
2 E25N27
(-363",457") 		E31-E19
(12) 		0.3 1.1 6.2e19

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 17-May-2021 19:30 UT .