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.
