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WIECHERT - HORIZONTAL MECHANICAL
SEISMOGRAPH
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Constructor – Emil Wiechert |
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Proizvođač: |
G.
Bartels, Göttingen |
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Year of production: |
1909 |
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Seismometer natural period: |
8-10 s |
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Damping ratio: |
(3-7):1 |
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Pendulum mass: |
1000 kg |
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Static magnification: |
0-240 times |
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SEISMOGRAMS
(24 hours)
the window is refreshed every 10
minutes
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The last data are shown with the
red vertical line:
left - new data,
right - 24 hours old data
up: NE-SW component
down: NW-SE component
If you wish to see the
seismograms in the new window
please click
here |
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The
Wiechert horizontal seismograph arrived in
Zagreb on March 12, 1909. Mohorovičić
installed the seismograph in the basement of
the building at Grič 3, and set it in trial
operation on March 16, 1909. The
seismograph was operating at Grič until
March 27, 1984.
Seismograph (disassembled into parts) was
moved into this building on September 12,
1985, and was thoroughly reconstructed until
1988. Due to the orientation of the room in
which the seismographs were originaly
installed, horizontal axes were directed
NW–SE and NE–SW, not as standard N–S and
E–W. This setup is kept here as well.
Wiechert horizontal mechanical seismographs
are still in operation. |
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