Earthquake Disaster
noun
An earthquake disaster is just that, an earthquake disaster. These are no good.
しんさい
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
震災にあった日のことが、今でも忘れられないトラウマになっています。
I still can't forget the trauma I experienced from the day of the earthquake disaster.
私の学校の先生は震災で帰らぬ人となりました。
A teacher at my school did not return home after the earthquake.
震災で、地面が穴ぼこだらけになってしまいました。ここでは、震災から三ヶ月たった今でも、地面にヒビが入ったままです。
The earthquake left the ground full of holes. Here, three months after the earthquake, the ground is still covered with cracks.