There was a large earthquake along the new hebrides trench, or 'New Hebrides Plate' which stretches 25,000 feet deep between New Caldeonia and Vanuatu. This event has been reviewed by USGS and NOAA and there is NO tsunami alert.
7.7
southeast of the Loyalty Islands
2021-02-10 13:19:55 (UTC)
10.0 km
6.1
southeast of the Loyalty Islands
2021-02-10 13:02:00 (UTC)
10.0 km
5.7
southeast of the Loyalty Islands
2021-02-10 12:32:11 (UTC)
10.0 km
6.0
southeast of the Loyalty Islands
2021-02-10 12:24:21 (UTC)
10.0 km
https://earthquake.usgs.gov/earthquakes/map/?currentFeatureId=us6000dg77&extent=-24.38463,-190.03601&extent=-22.04491,-185.81177&listOnlyShown=true&timeZone=utc
Here is the USGS data for the Mag7.7, however there are "89 earthquakes".
https://earthquake.usgs.gov/earthquakes/eventpage/us6000dg77/
Message: Guam/CNMI Informational #1
Issued Wed Feb 10 21:35:23 UTC 2021
No Tsunami Warning, Advisory, Watch, or Threat
https://www.tsunami.gov/?p=PHEB/2021/02/10/21041007/1/WEGM42
Take a look at
New Hebrides trench: First look at unexplored deep sea
By Rebecca Morelle - Science reporter, BBC World Service
""We're starting to find out that what happens at one trench doesn't necessarily represent what happens in all the trenches," said Dr Alan Jamieson, from Oceanlab at the University of Aberdeen, UK, who carried out the expedition with the National Institute of Water and Atmospheric Research in New Zealand."
https://www.bbc.com/news/science-environment-26373896
