The strongest of dozens of tremors Monday was a magnitude 3.3 quake shortly after noon. All the quakes were centered beneath the northwest end of Yellowstone Lake.

• 在数十次震动中最强烈的就是发生在午后不久的里氏3.；3级地震。所有的地震的中心都位于黄石湖畔西北方的地下。