It's a mistranslation by BSS, as mentioned on their site.Originally Posted by RyougaZell
According to them, the scale used in Japan isn't the Richter scale, but a different on where it ranges from 0(or 1?) -7.
Magnitude 8.0 means it was an earthquake of a power previously unrecorded, and never thought to be measured by the creators of the scale.
I liked the panicking Mirai. It portrays very well how relatives act when family members are in trouble.