论文部分内容阅读
地震(earthquake)就是地球表层的快速振动,在古代又称为地动。它就象刮风、下雨、闪电、山崩、火山爆发一样,是地球上经常发生的一种自然现象。它发源于地下某一点,该点称为震源(focus)。振动从震源传出,在地球中传播。地面上离震源最近的一点称为震中,它是接受振动最早的部位?
Earthquake (earthquake) is the rapid vibration of the Earth’s surface, also known as earth moving in ancient times. Like windy, rainy, lightning, landslide, volcanic eruptions, it is a natural phenomenon on Earth. It originated in a point underground, the point called the focus (focus). Vibration comes from the source and spreads in the earth. The closest point on the ground from the epicenter is called the epicenter. Is it the earliest place to receive vibrations?