OBSERVED NOISE IN THE STANDARD SEISMOGRAPHS OF TOLEDO OBSERVATORY.
Abstract
The correlation between the velocity of the wind in the area of Toledo Observatory and the noise observed on the long period records of Standard seismographs has been studied. This correlation shows a clear dependence between the observed noise amplitudes on the horizontal components and the velocity and direction of the wind. The maximal amplitudes are produced for the wind coming from the East and we thought it is due to that E-wall of the seismology vault is the side of the building most exposed to the free action of the wind. We suggest the modification of the vault or even better the construction of a new one, in order to avoid these disturbances which masks, specially in winter time, many of recorded seismic events. Also we have studied the noise produced by the traffic through the highroad nearest to the Observatory. Changes in the atmospheric pressure, appearance of convection currents in the air of the vault or isolated effects of resonance in the spring of the vertical seismometer LP have been also related to some isolated disturbances. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1963
- Accession Number
- AD0665418
Entities
People
- G. Payo