PILLET , R.

L'étude des capteurs inertiels construits pour l'enregistrement des mouvements à la surface de la terre, permet de faire apparaître certains fonctionnements imprévus. Les sismomètres enregistrent parfois des rotations alors que des mouvements de translation sont attendus. Les équations des sismomètres montrent que l'utilisation de capteurs à un...

Seismological Research Letters, v. 79, n. 4, p. 498-503, 2008. http://dx.doi.org/10.1785/gssrl.79.4.498

The seismic background noise observed on the OBS (ocean-bottom seismometer) recordings is well known to be strong. With the recent appearance of broadband OBS, the background noise in the extended frequency range is even more significant. By taking into account the various degrees of freedom of the seismic sensors, it has been shown that the...

The Institut de Physique du Globe in Paris (IPGP) has a solid tradition in long-period seismology and instrumentation. The IPGP Seismological Laboratory designed handmade instruments from 1952 to 1982, mainly to study the Earth tide tilt. After several attempts, the first prototype of a tiltmeter was constructed in 1957 by P.A. Blum (Blum and...