MICROSEISM
Source: 567
Mi″cro‐seism (?), n. [[Micro- + Gr. � an earthquake, fr. � to shake.]] A feeble earth tremor not directly perceptible, but detected only by means of specially constructed apparatus. — Mi′cro‐seis″mic (#), ‐seis″mic‐al (#), a.
Source: 567
Mi″cro‐seism (?), n. [[Micro- + Gr. � an earthquake, fr. � to shake.]] A feeble earth tremor not directly perceptible, but detected only by means of specially constructed apparatus. — Mi′cro‐seis″mic (#), ‐seis″mic‐al (#), a.