略語大辞典 [Geo] 31 NDC non-double-couple (mechanism) (地震の)非二重結合(機構).non-double-couple (mechanism); a mechanism of earthquakes; ref. CLVD(compensated linear vector dipole), an earthquake mechanism in which motion toward (or away from) the focalregion along a polar axis compensatesfor motion away(or towar 丸善「略語大辞典」JLogosID : 11862623