After every major tsunami, deep-sea fauna and flora, as well as those commonly seen in the most majorly-impacted areas, are often found thousands of miles away upon foreign shores. That is what I mean by biological remnants - I'm talking about the originating seismic event and its aftermath, not the veracity of claims of radiation poisoning or environmental effect.
Ah, ok. In that case it's just the 2011 TÅhoku earthquake and tsunami then, since it hit that part of Japan. Fukushima was a specific nuclear facility.
