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The Effects of the Atmospheric Pressure Changes on Seismic Signals or How to Improve the Quality of a Station

Beauduin, R. and Lognonné, P. and Montagner, J. P. and Cacho, S. and Karczewski, J. F. and Morand, M. (1996) The Effects of the Atmospheric Pressure Changes on Seismic Signals or How to Improve the Quality of a Station. Bulletin of the Seismological Society of America, 86 (6). pp. 1760-1769. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140807-074345381

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Abstract

Seismic investigations are mainly limited by seismic noise. Two microbarometers have been installed in the seismic vault of two different GEOSCOPE stations, one at SSB and the other at TAM. All vertical components and most of the horizontal components show a significant correlation with pressure. In order to correct the seismic signals from the atmospheric pressure noise, a transfer function between the pressure data and the seismic data is inverted. Results show that, after correction, the noise levels reached on the horizontal components are similar between the two stations, and the vertical components display noise levels below the low-noise model as defined by Peterson (1993). This technique reduces part of the noise and allows detection of small earthquakes and a better extraction of normal modes. The analysis of the lowest normal modes of the Earth excited by the M_S = 8.2 Macquarie Island earthquake is given to illustrate the perspectives of the method.


Item Type:Article
Related URLs:
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http://bssa.geoscienceworld.org/content/86/6/1760.abstractPublisherArticle
Additional Information:© 1996, by the Seismological Society of America. Manuscript received 12 May 1995. We wish to thank G. Roult, R. Nawab, P. Ihmlr, P. Bernard, E. Wielandt, and the GEOSCOPE team for the fruitful discussion we had during this work, W. Ztirn for sending us the data of BFO, and two anonymous reviewers for their suggestions. Many thanks to the GEOSCOPE operators for the high quality of seismic data. This is IPGP Contribution Number 1444 and Contribution Number 5596 of the Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California.
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Other Numbering System NameOther Numbering System ID
IPGP1444
Caltech Division of Geological and Planetary Sciences5596
Issue or Number:6
Record Number:CaltechAUTHORS:20140807-074345381
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140807-074345381
Official Citation:R. Beauduin, P. Lognonné, J. P. Montagner, S. Cacho, J. F. Karczewski, and M. Morand The effects of the atmospheric pressure changes on seismic signals or how to improve the quality of a station Bulletin of the Seismological Society of America, December 1996, v. 86, p. 1760-1769
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48157
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:07 Aug 2014 16:09
Last Modified:03 Oct 2019 07:00

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