Sent_en: 2zh If an earthquake happens at such a low depth, the waves move along low layers, practically the mantle, but weaken significantly before reaching the earth surface.
Sent_yy: 如果地震发生在如此浅的深度，地震波就会沿较浅的层移动，实际上是沿地幔移动，但在到达地表之前会明显减弱。