爆発 ばくはつ てき噴火 ふんかじゃなかったです
bakuhatsuteki funkajanakattadesu

Noun
Desu Copula

The polite, past negative form of 爆発的噴火

1. Wasn't explosive.; Wasn't eruptive.

Past/Perfective
Negative
Polite
Casual Register