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10 - Rocard


Made in 1958 in the CEA (France).
In operation in Welschbruch station (Bas-Rhin) from 1964 onwards.

  • a classical electromagnetic seismometer: one horizontal and one vertical component
    period 1 s
  • electronic amplification

A portable seismometer originally designed for detecting nuclear explosions, it may be equipped with a pre-amplificator, an amplificator and a paper recording system.