Earthquake in Japan

Hi,

It was a major quacke and there are many casualties...

The roads and railways were closed for a while, but no reports of damages so far. I guess because they are basically two dimensional (they have no hight, unlike buildings), if they're not too close to the nucleous they can stay intact.

One track was buried under a mud slide 

The epicenter of the earthquake was in the middle of the Sea of Japan, and sometimes the places that affected the worst are the places that are the most unstable, not the places underground.  Sure, there was some damage underground and some things that had to be repaired, but most of the terrible damage was from buildings that weren't built to withstand that much shaking.