Earthquake Intensity
Seismic Intensity, Seismic Scale
noun
The earthquake degrees is how you measure an earthquake. The 震度 is the earthquake intensity, AKA earthquake magnitude, seismic intensity, or seismic scale.
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.
マグニチュードと震度って、何がちがうの？
What’s the difference between the magnitude and seismic scale?
あの地震では、最大震度が７強もあったらしいよ。
I heard that the maximum intensity of that earthquake was over seven.
うちの魚は震度３くらいの地震だと、ピクリとも動きません。
My fish don't even twitch when the earthquake is about a three on the Japanese seismic scale.