Results 211 to 220 of about 14,357 (245)
A new look at South African seismicity using a temporary network of seismometers : research article
, 2002 E. Kgaswane +4 more
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SPIE Proceedings, 1987
This paper reviews the present state of seismometry and discusses a seismometer based on fiber-optic technology. In addition, some actual data taken by a portable laboratory-grade fiber-optic seismometer is presented.
C M. Davis +3 more
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This paper reviews the present state of seismometry and discusses a seismometer based on fiber-optic technology. In addition, some actual data taken by a portable laboratory-grade fiber-optic seismometer is presented.
C M. Davis +3 more
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The Journal of the Acoustical Society of America, 1961
By time-compressing the output of a seismometer, it is possible to present seismographic data in an auditory display. Preliminary data suggest that the seismic sounds due to natural earthquakes may be distinguishable from those due to underground explosions.
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By time-compressing the output of a seismometer, it is possible to present seismographic data in an auditory display. Preliminary data suggest that the seismic sounds due to natural earthquakes may be distinguishable from those due to underground explosions.
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Universal Piezoelectric Seismometer
Seismic Instruments, 2020A universal piezoelectric seismometer is proposed that can simultaneously record linear and angular accelerations through two separate channels. The operational principle of the seismometer and the features of its design are described; the mechanical and electric circuits are considered.
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Seismic Instruments, 2011
We have developed an autonomous portable digital seismometer for measurements in the field, in engineering constructions, and in hard-to-reach places. The seismometer is a monoblock including an SM-6 seismic receiver and digital seismic recorder. The SM-6 seismic receiver is a highly effective device for field work on investigating a microseismic wave ...
I. P. Bashilov +3 more
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We have developed an autonomous portable digital seismometer for measurements in the field, in engineering constructions, and in hard-to-reach places. The seismometer is a monoblock including an SM-6 seismic receiver and digital seismic recorder. The SM-6 seismic receiver is a highly effective device for field work on investigating a microseismic wave ...
I. P. Bashilov +3 more
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Bulletin of the Seismological Society of America, 1948
Abstract Theory and description are given of sensitive capacity-type seismometers having small size, eddy-current damping, and an undamped period of 0.23 second. The voltage output is taken to the grid of a cathode-follower tube within the instrument and is thereafter amplified.
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Abstract Theory and description are given of sensitive capacity-type seismometers having small size, eddy-current damping, and an undamped period of 0.23 second. The voltage output is taken to the grid of a cathode-follower tube within the instrument and is thereafter amplified.
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Astronomy & Astrophysics, 1993
We present the design of a new type of instrument to measure small doppler shifts in spectral lines. Our instrument is a form of Heterodyned, Holographic Spectrometer, here optimized for high photon efficiency. It should be suitable for the measurement of solar or stellar oscillations, which is our primary goal, or in the search for stellar-planetary ...
FRANDSEN, S, DOUGLAS, NG, BUTCHER, HR
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We present the design of a new type of instrument to measure small doppler shifts in spectral lines. Our instrument is a form of Heterodyned, Holographic Spectrometer, here optimized for high photon efficiency. It should be suitable for the measurement of solar or stellar oscillations, which is our primary goal, or in the search for stellar-planetary ...
FRANDSEN, S, DOUGLAS, NG, BUTCHER, HR
openaire +1 more source