First Advisor

Shripad Tuljapurkar

Date of Publication

1983

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Physics

Department

Physics

Language

English

Subjects

Earth movements, Tiltmeter, Strain gages

DOI

10.15760/etd.5006

Physical Description

1 online resource (88 p.)

Abstract

Tilt and strain meters were installed on the Portland State University campus in the summer of 1982 and data was collected for 4 months. Instrument selection, operation, installation and performance are discussed.

Suggestions that could enhance data quality and data collection efficiency are presented.

An analysis procedure is suggested and an example of this procedure for an interval of data is discussed. The influence of the temperature, pressure, rainfall and solid earth tides on the signal is investigated, as well as the correlation between similar channels of the different tilt instruments. The temperature, rainfall and solid earth tides were all determined to have an influence on the instruments. A statistical test of the influence of the barometric pressure on the signal revealed no significant influence. A very low correlation between similar components of the different tilt instruments was observed aside from their thermal dependence. It was concluded that in order to obtain high quality data for the use in quantitative calculations, the temperature influence on the raw record must be minimized.

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Comments

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Persistent Identifier

http://archives.pdx.edu/ds/psu/19040

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