Open AccessUse of a bubble tiltmeter as a horizontal seismometer
Author(s) -
Miller Wayne F.,
Geller Robert J.,
Stein Seth
Publication year - 1978
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1978.tb05500.x
Subject(s) - tiltmeter , seismometer , bubble , geology , seismology , passband , tilt (camera) , displacement (psychology) , geodesy , acoustics , optics , physics , mechanics , mathematics , band pass filter , geometry , amplitude , psychology , psychotherapist
Summary. A bubble tiltmeter has been used as a horizontal seismometer. With the appropriate filters, the bubble system has good response for displacement over the passband of conventional seismometers (from about 10 Hz to 200 s), and for tilt from about 1 Hz to DC. The accuracy of the response is confirmed by comparing the filtered bubble output to conventional seismic instruments. The agreement between the filtered bubble records and broad band ( T 0 = 1 s, T g = 90 s) and short period ( T 0 = 1 s, T g = 0.2 s) conventional records is extremely good in every case. The small size, broad‐band response, and lack of moving parts make the bubble ideal as an instrument for remote environments. In particular, the instrument seems ideal for the ocean bottom, land and marine boreholes and planetary missions.