This is an artificial earthquake experiment footage by atomic bomb held in Alaska.
An earthquake with a magnitude of 6.8 was observed.
5 Megaton Nuclear Device Amchitka, Alaska
In this experiment, the atomic bombs were installed from the estimated basement one mile to two miles.
Mind you, the footage is directly above the epicenter, whereas the epicenter of most earthquakes (like the one in Japan) are like a mile or more below the ground and a few miles off-shore.