Seismographs in A Sentence

    1

    From August 1994 until May 1997, a network of 8 three-component digital seismographs operated at the Acu reservoir.

    2

    Instruments largely employed for this purpose in Italy are ordinary pendulum seismographs as in fig.

    3

    The essential feature in these seismographs is a fairly heavy mass of metal, so suspended that although its supports are moved, some point in the mass remains practically at rest.

    4

    The next class of instruments to be considered are seismometers or earthquake measurers, and seismographs or instruments which Se give diagrams of earthquake motion.

    5

    The value of these records, as is the case with other forms of seismographs, is impaired by pronounced tiltings of the ground.

    6

    This type of apparatus has been replaced in Japan by what are called duplex pendulum seismographs.