Physics – Geophysics
Scientific paper
1999-11-11
Physics
Geophysics
14 pages, 3 figures
Scientific paper
Researchers of seismic waves may construct a new seismographic recording adding one seismometer to each component of a conventional seismic station. The two identical conventional seismometers are set up in position of perpendicular and are connected in parallel feeding one recording device (digital or analog). This use of the seismometers (which they may be both horizontal or, one is vertical) is called "two seismometers seismograph" or simply "2S-S". 2S-seismograph performs new capabilities: 1.-it cause to a higher gain which is based on directly ground motion energy from the two orthogonal components of signals, 2.-it has a much smoother response curve than that of the single use of seismometer,3.-because of this smoothing, we are able to apply a higher level of static magnification which cause to widening the response at its both ends, therefore, 2S-System enable to work with a larger dynamic range frequency, 4.- it has a directional and motional filtering property which may be used in some cases advantageously, The contribution of "1", "2", "3" and "4" correspond to unique instrumental improvements for which seismography are ever needed. Data which are obtained from the 2S-Ss have also more advantageous properties comparing with even that of ARRAY's: 5.-it is possible to record signals with their larger plane components all the time by a second 2S-S connected with the opposite ends, 6.-seismic wave types (P,S,R,L) can often be recorded separately on a separated 2S-seismogram since researchers usually deal with a known area of research, 7.-some implicit weak signals, which can not be readable as a phase on the conventional seismograms, become recorded newly and readably by the 2S-Ss
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