The macroscopic earth sound and the earthquakesound are discussed briefly.
对宏观震声和地声也作简要讨论。
2
The earthquake began with a deep [low] rumbling sound.
地震开始时发出低沉的隆隆声。
《新英汉大辞典》
3
The sound is an emergency earthquake warning from an iPhone app that lets subscribers know when the quake will come, where the epicenterwill be located and how strong the shaking will be.