21[[413]](https://en.wikipedia.org/wiki/<#cite_note-413>) | ![](https://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Flag_of_Vanuatu.svg/23px-Flag_of_Vanuatu.svg.png) [Vanuatu](https://en.wikipedia.org/wiki/</wiki/Vanuatu> "Vanuatu"), [Shefa](https://en.wikipedia.org/wiki/</wiki/Shefa_Province> "Shefa Province") offshore, 30 km (19 mi) west of [Port Vila](https://en.wikipedia.org/wiki/</wiki/Port_Vila> "Port Vila") | 6.1  | 46.0  | V  | Aftershock of the 7.3 earthquake four days prior.  | -  | -
An aftershock measuring 6.1 in magnitude occurred offshore of Vanuatu, 30 km (19 mi) west of Port Vila, in the Shefa Province. This event followed a larger 7.3 magnitude earthquake that had taken place four days earlier.
What was the magnitude of the aftershock that occurred near Port Vila, Vanuatu, following the larger earthquake?
The content provides specific and informative details about an aftershock event related to a previous earthquake, including its location, magnitude, and relation to a prior seismic event. This information is valuable and relevant to understanding the seismic activity in the region.