異常 いじょう震域 しんいきではありませんでした
ijōshin ikidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 異常震域

1. It was not an unusual seismic zone.; It wasn't an abnormal seismic area.

Past/Perfective
Negative
Polite
Formal Register