Looks like the Raytheon Interceptor to me
https://www.raytheon.com/capabilities/products/sm-3
This reeks of desperation
http://www.foxnews.com/tech/2018/04/26/could-insane-russian-nuclear-torpedo-cause-300-foot-tidal-waves.html
BTW this isnt the question & answer forum
Thats what jewgle is for
https://thediplomat.com/2017/08/us-successfully-tests-sm-6-missile-interceptor-in-pacific/
see—→>>1720033
An eruption would show on seismographs