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Tilt observations in the normal mode frequency band at the Geodynamic Observatory Cueva de los Verdes, Lanzarote

Kalinina, A.V. and Volkov, VA and Gorbatikov , AV and Arnoso, J. and Vieira, R. and Benavent Merchán, María Teresa (2004) Tilt observations in the normal mode frequency band at the Geodynamic Observatory Cueva de los Verdes, Lanzarote. Pure and Applied Geophysics, 161 (7). pp. 1597-1611. ISSN 0033-4553

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Abstract

We have conducted observations with the aid of a seismo-tiltmeter station, which is based
on the Ostrovsky pendulum and installed at the Geodynamic Observatory Cueva de los Verdes at
Lanzarote Island since 1995. In this station the signal is separated into two frequency bands – tidal tilts
(from 0 to 5 mHz) and ground oscillations in the frequency range of free Earth’s normal modes (from 0.2
to 5 mHz). The later band, called accelerometer channel, has additional amplification. We analyzed the
background records in the frequency range of Earth’s free oscillations from August 2000 to September
2001, as well as, Earth’s normal modes after strong earthquakes. We found several distinctive persistent
peaks in the spectra of background oscillations. Both amplitudes of distinguished peaks and noises have
seasonal variations. We found that spectra of background oscillations are different in the frequency
interval between 1.4 and 2.5 mHz for North- South and East-West components.

Item Type:Article
Additional Information:International Complutense Seminar on Geodetic and Geophysical Effects Associated with Seismic and Volcanic Hazards, Oct 08-11, 2001, Madrid, Spain
Uncontrolled Keywords:Earths Free Oscillations; Canary-Islands; Crustal Structure; Incessant Excitation; Gravity; background Earth's oscillations; Earth's normal modes; seismo-tiltmeter; tidal tilts; Lanzarote; Canary; Geochemistry & Geophysics
Subjects:Sciences > Physics > Geophysics
ID Code:14808
References:

ALSOP, L., SUTTON, G., and EWING, M. (1961), Free Oscillations of the Earth Observed on Strain and

Pendulum Seismographs, J. Geophys. Res. 66, 631.

ANGUITA, F. and HERNAN, F. (1975), A Propagating Fracture Model versus a Hot Spot Origin for the

Canary Islands, Earth Planet. Sci. Lett. 27, 11–19.

ARNOSO, J., FERNANDEZ, J., and VIEIRA, R. (2001a), Interpretation of Tidal Gravity Anomalies in

Lanzarote, Canary Islands, J. Geodynamics 31(4), 341–354.

ARNOSO, J., VIEIRA, R., VELEZ, E., VAN RUYMBEKE, M., and VENEDIKOV, A. (2001b), Studies of Tides and

Instrumental Performance of Three Gravimeters at Cueva De Los Verdes (Lanzarote, Spain), J. Geodetic

Soc. Japan 47(1), 70–75.

ARNOSO, J., VIEIRA, R., VELEZ, E., WEIXIN, C., SHILING, T., JUN, J., and VENEDIKOV, A. (2001c),

Monitoring Tidal and Non-tidal Tilt Variations in Lanzarote Island (Spain), J. Geodetic Soc. Japan 47(1),

456–462.

BANDA, E., DANOBEITIA, J. J., SURINACH, E., and ANSORGE, J. (1981), Features of Crustal Structure under

Canary Islands, Earth Planet. Sci. Lett. 55, 11–24.

BOSSHARD, E. and MACFARLANE, D. J. (1970), Crustal Structure of the W Canary Islands from Seismic

Refraction and Gravity Data, J. Geophys. Res. 75, 4901–4918.

CANALES, J. P. and DANOBEITIA, J. J. (1998), The Canary Islands Swell: A Coherence Analysis of

Bathymetry and Gravity, Geophys. J. Inst. 132, 479–488.

DANOBEITIA, J. J., CANALES, J. P., andDEHGHANI,G. A. (1994), An Estimation of the Elastic Thickness of the

Lithosphere in the Canary Archipelago Using Admittance Functions, Geophys. Res. Lett. 21, 2649–2652.

DAVYDOV, A. and DOLGIKH, G. (1995), Recording of Ultra Low-frequency Oscillations by a 52.5 m Laser

Strainmeter, Izv. Acad. Sc. USSR, Physics of the Solid Earth 31(3), 248–251.DOLGIKH, G., KOPVILLEM, U., and PAVLOV, A. (1983), Observation of Periods of Free Oscillations of the

Earth with a Laser Deformometer, Izv. Acad. Sc. USSR, Physics of the Solid Earth 19, 2 79–83.

FUSTER, J. M., FERNANDEZ SANTIN, S, and SAGREDO, J. (1968), Geology and Volcanology of the Canary

Islands, Lanzarote, Instituto Lucas Mallada, CSIS, Madrid.

IMANISHI, Y. (1998), Comment on ‘‘Incessant Excitation of the Earth’s Free Oscillations’’ by Nawa et al.,

Earth Planet. Space 50, 883–885.

KALININA, A., VOLKOV, V., VIEIRA, R., ARNOSO, J., BULOSHNIKOV, A., GORBATIKOV, A., and NIKOLAEV,

A. (2000), Preliminary Results from Tiltmeter Records of Earthquakes Made at the Cueva De Los Verdes

Geodynamical Observatory on Lanzarote Island, Spain, Volc. Seis. 22, 73–86.

KOBAYASHI, N. and NISHIDA, K. (1998), Continuous Excitation of Planetary Free Oscillations by

Atmospheric Disturbances, Nature 395, 357–360.

KOBAYASHI, N., NISHIDA, K., and FUKAO, Y. (2001), Continuous Excitation of Earth’s free oscillations. In:

Proc. Int. Conf. Long-term Observations in the Oceans, Fuji, Yamanashi, Japan, pp. 30–32.

MARINONI, L. B. (1991), Evoluzione geologica e sttructurale dell’isola di Lanzarote (Islas Canarias), Ph.D.

Thesis, University of Milan, Milan.

MAZAROVICH, A. O., Geology of the Central Atlantic: Fractures, Volcanic Edifices and Oceanic Bottom

Deformations (Nauchnyi Mir, Moscow 2000).

NAWA, K., SUDA, N., FUKAO, Y., SATO, T., AOYAMA, Y., and SHIBUYA, K. (1998), Incessant Excitation of

the Earth’s Free Oscillations, Earth Planet. Space 50, 3–8.

NESTEROV, V., GOLOVIN, S., and NASOKIN, V. (1990), Measurements of Long-period Oscillations of the

Earth Using Laser Interferometer – Strainmeters, Izv. Acad.Sc. USSR, Physics of the Solid Earth 26,

326–330.

OSTROVSKY, A. E. (1961), Tiltmeter with Photo-electric Registration, BIM 25, 500 and BIM 26, 540.

PETROVA, L. and VOLKOV, V. (1996), Dynamic Features of Seismo-gravitational Oscillations of the Earth,

Report Acad. Sc. 41(12), 683–686.

RANERO, C. R., BANDA, E., and BUHL, P. (1997), The Crustal Structure of the Canary Basin: Accretion

Process at Slow Spreading Centers, J. Geophys. Res. 102, 10,185–10,201.

SUDA, N., NAWA, K., and FUKAO, Y. (1998), Earth’s Background Free Oscillations, Science 279, 2085–

2091.TANIMOTO, T., UM, J., NISHIDA, K., and KOBAYASHI, N. (1998), Earth’s Continuous Oscillations Observed

on Seismically Quiet Days, Geophys. Res. Lett., 25(10), 1553–1556.

VIEIRA, R., VAN RUYMBEKE, M., FERNANDEZ, J., ARNOSO, J., and TORO, C. (1991), The Lanzarote

Underground Laboratory, Cahiers du Centre Europeen de Geodynamique et de Seismologie 4, 71–86.

WATTS, A. B., PEIRCE, C., COLLIER, J., DALWOOD, R., CANALES, J. P., and HENSTOCK, T. J. (1997), A

Seismic Study of Lithospheric Flexure in the Vicinity of Tenerife, Canary Islands, Earth Planet. Sci. Lett.

146, 431–447.

WILSON, J. T. (1973), Mantle Plumes and Plate Motions, Tectonophysics 19, 149–164.

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