地震 じしん前兆 ぜんちょう現象 げんしょうではありませんでした
jishinzenchōgenshōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 地震前兆現象

1. It was not a pre-earthquake anomaly.; It wasn't a sign of an impending earthquake.

Past/Perfective
Negative
Polite
Formal Register