25 August 2021
⇐20210824 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210826⇒

NOAA
3 Active Regions
12859
12860
12858

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 E19N68
(-118",832") 		E60-W74
(134) 		3.6 0.9 1.0e21
2 E11N06
(-187",-9") 		E27-W13
(40) 		2.3 -0.2 -5.9e19
3 W30N15
(459",144") 		W26-W34
(8) 		0.3 -3.6 -2.0e20
4 W34S30
(462",-555") 		W31-W39
(8) 		0.2 -7.1 -3.8e20
5 E56N59
(-408",774") 		E59-E52
(7) 		0.0 1.8 3.5e19
6 E42S08
(-631",-210") 		E44-E40
(4) 		0.0 -0.5 -3.9e18
7 W11N05
(182",-40") 		W10-W12
(2) 		0.0 -1.2 -7.4e18

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 25-Aug-2021 23:30 UT .