火か山ざん性せい地じ震しん

noun

volcanic earthquake

A technical term in seismology and volcanology referring to earthquakes caused by volcanic activity, such as magma movement or eruptions.

• 火か山ざん性せい地じ震しんの回かい数すうが増ふえると、噴ふん火かの前ぜん兆ちょうかもしれない。

  When the number of volcanic earthquakes increases, it may be a sign of an impending eruption.