2011 Sendai Earthquake And Tsunami, Tōhoku Region, Pacific Ocean

Shinmoedake, a volcano in Kyushu, erupted two days after the earthquake. Although previous eruptions of the volcano occurred in January 2011, it is not known if the earthquake had triggered a renewed eruption.
Tsunami
The earthquake triggered tsunami warnings and evacuations for Japan's Pacific coast and at least 20 countries, including the entire Pacific coast of North and South America from Alaska to Chile. Most of the damage and destruction occurred along the Pacific coastline of Japan's northern islands, with relatively minor effects elsewhere around the Pacific.