ゆっくり地じ震しん

noun

slow earthquake; low-frequency earthquake; silent earthquake

Seismological term for an earthquake that releases energy gradually over hours to months, often without noticeable shaking. Contrasts with ordinary fast earthquakes.

• ゆっくり地じ震しんは、通つう常じょうの地じ震しんと違ちがって、揺ゆれをほとんど感かんじさせない。

  Unlike ordinary earthquakes, slow earthquakes produce almost no perceptible shaking.