地ち電でん流りゅう

noun

earth current; telluric current

Technical term in geophysics and electrical engineering for natural electric currents flowing through the Earth's crust.

• 地ち電でん流りゅうの測そく定ていは、地ち下か構こう造ぞうの調ちょう査さに役やく立だつ。

  Measuring earth currents is useful for investigating underground structures.