XXIX ESC General Assembly, Sept. 12-17, 2004 - GFZ

7.2 Developments in Jena from 1900 to 1969
In response to the recommendations made by G. GERLAND at the German
Geographer Day 1897 in Jena and his publication on the establishment of an
earthquake monitoring system sent in 1898 to the curator of the Jena University:
1900 Rudolph STRAUBEL (1864-1964) installs at the Physical Institute
of the University of Jena
• a REBEUR-EHLERT pendulum and
• his own Z-component seismograph
1904 Opening of JENA Seismol. Main Station
at the Astronomical Observatory in Jena.
The observatory is equipped with:
• STRAUBEL Z-comp. seismograph
(T = 6.6 s, V = 2030), improved by
Otto EPPENSTEIN. →
• WIECHERT 1200 kg (N, E) astatic
pendulum ( T ≈ 10 ± 2 s; V ≈ 200 ± 30
Peter Bormann XXIX ESC General Assembly, Sept. 12-17, 2004