中源地震

zhōngyuándìzhèn
medium depth earthquake (with epicenter 70-300 km deep)

CEDICT

震源的深度在地下七十至三百公里的地震，稱為「中源地震」。

重編國語辭典

Entry Composition

1 中 zhōng
  1. within; among; in
  2. middle; center
  3. while (doing sth); during
  4. (dialect) OK; all right
2 源地 yuándì source area; where something has come from
3 震 zhèn
  1. to shake
  2. to vibrate
  3. to jolt
  4. to quake
  5. excited
  6. shocked
  7. one of the Eight Trigrams 八卦 bāguà, symbolizing thunder
  8. ☳