14 September 2021
⇐20210913 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210915⇒

NOAA
4 Active Regions
12866
12868
12869
12870

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 W06S07
(105",-227") 		E34-W35
(69) 		7.3 -0.0 -4.1e19
2 W12N26
(174",308") 		E15-W32
(47) 		2.6 -1.2 -5.2e20
3 E30S30
(-417",-559") 		E49-E15
(34) 		1.3 -0.5 -1.4e20
4 E49N72
(-228",874") 		E63-W00
(63) 		1.0 1.0 4.7e20
5 W68N73
(256",893") 		E109-W85
(194) 		0.5 0.6 2.3e20
6 E27S65
(-178",-906") 		E48-E13
(35) 		0.3 -0.6 -9.7e19
7 E04N36
(-55",457") 		E06-E02
(4) 		0.1 -0.8 -7.8e18
8 E04N14
(-72",108") 		E06-E03
(3) 		0.1 -2.3 -2.0e19
9 E10N39
(-131",507") 		E12-E08
(4) 		0.0 -0.7 -6.3e18
10 E51S29
(-650",-523") 		E53-E48
(5) 		0.0 -0.8 -9.0e18

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 14-Sep-2021 19:30 UT .