15 September 2021
⇐20210914 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210916⇒

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 W14N10
(220",48") 		E36-W42
(78) 		13.0 -0.2 -4.3e20
2 E14N70
(-79",853") 		E63-W78
(141) 		3.0 1.3 1.3e21
3 E11S35
(-156",-638") 		E22-W12
(34) 		2.5 -0.2 -1.1e20
4 E30S63
(-217",-889") 		E53-W21
(74) 		1.0 -0.7 -4.1e20
5 E34N33
(-444",439") 		E41-E30
(11) 		0.6 3.3 3.6e20
6 W11S23
(175",-472") 		W06-W17
(11) 		0.2 -0.8 -3.2e19
7 E25N21
(-385",237") 		E30-E20
(10) 		0.2 4.1 1.7e20
8 E03N10
(-46",53") 		E04-E00
(4) 		0.2 1.1 2.8e19
9 W35N26
(493",326") 		W33-W37
(4) 		0.1 -2.9 -3.8e19
10 W06S27
(96",-544") 		W05-W08
(3) 		0.0 -1.3 -9.8e18

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 15-Sep-2021 23:30 UT .