17 May 2025
⇐20250516 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250518⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E18S39
(-225",-573") 		E75-W38
(113) 		14.4 2.9 8.4e21
2 W49N01
(718",44") 		W44-W53
(9) 		0.1 0.5 1.5e19
3 E43S31
(-555",-471") 		E48-E38
(10) 		0.1 2.9 3.8e19
4 E08S03
(-127",-7") 		E09-E06
(3) 		0.0 7.4 5.5e19
5 W04S50
(43",-700") 		W02-W06
(4) 		0.0 -0.8 -7.5e18

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-2025 23:30 UT .