noun
tsunami earthquake
A seismological term for an earthquake that generates a disproportionately large tsunami relative to its magnitude, often due to slow rupture or shallow depth.
津波地震は、マグニチュードの割に大きな津波を引き起こす。
A tsunami earthquake generates a large tsunami relative to its magnitude.
Compound of 津波 (tsunami) and 地震 (earthquake). The term is a direct calque from English 'tsunami earthquake', coined in seismology.