Where does “三陸地震” come from?

三陸地震 (Japanese) comes from Japanese 地震, from Japanese 地, from Middle Chinese 地.

三陸地震 (Japanese): A megathrust or intraplate earthquake occurring at Japan Trench off the coast of Miyagi, Iwate, and Aomori in Japan once in a few decades, especially that occurred on June 15, 1896 or on March 3, 1933

Definitions

  1. A megathrust or intraplate earthquake occurring at Japan Trench off the coast of Miyagi, Iwate, and Aomori in Japan once in a few decades, especially that occurred on June 15, 1896 or on March 3, 1933

Ancestry of “三陸地震”, step by step

三陸地震 traces back through two separate lines of ancestry.

via Japanese 地震

StepLanguageWordMeaning
1Japanese地震an earthquake
2Japanese地earth, dirt; fabric, cloth; territory
3Middle Chinese地—

via Japanese 三陸

StepLanguageWordMeaning
1Japanese三陸—
Every word from Middle Chinese 地 →Every word from Japanese 地 →Every word from Japanese 地震 →