Those seismic waves would converge at the impact's antipodal point, off the coastline of Africa's Madagascar.
这些地震波将汇聚于撞击处相对立的地方位于马达加斯加的海岸。
美国历史频道纪录片《宇宙》
Moments after impact, seismic waves converged at the antipodal point, the spot on the exact opposite side of the planet.
撞击后瞬间产生的地震波汇聚于相反的一点刚好在水星背面的对应点上。
英语百科
Antipodal point
In mathematics, the antipodal point of a point on the surface of a sphere is the point which is diametrically opposite to it — so situated that a line drawn from the one to the other passes through the center of the sphere and forms a true diameter.
This term applies to opposite points on a circle or any n-sphere.