Improved signal discrimination in tectonomagnetism: Discovery of a volcanomagnetic effect at Kilauea, Hawaii

Davis, Paul M.; Stacey, Frank D.; Zablocki, Charles J.; Olson, John V.

doi:10.1016/0031-9201(79)90005-0

Cited by 40 publications

(21 citation statements)

References 11 publications

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“…Significant correlation between volcanic activity and changes in the geomagnetic field were observed on several volcanos (e .g., Zlotnicki and Mouel, 1988;Sasai et al, 1990;Davis et al, 1979;Johnston et al, 1981). Such a volcanomagnetic effect will be interpreted from the following two kinds of terms: (a) the effect of mechanical stress changes on magnetic susceptibility and/or remanent magnetization of rocks in the crust (e.g., Suzuki and Oshiman, 1990;Sasai, 1991) and (b) thermal demagnetization or magnetization (e.g., Rikitake, 1951).…”

Section: Introductionmentioning

confidence: 99%

Magnetometer Array Observation in the North-Eastern Izu Region after the Teisi Knoll Seafloor Eruption in 1989.

Oshiman¹,

Honkura²,

Sasai³

et al. 1991

J,Phys,Earth

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Section: Introductionmentioning

confidence: 99%

Magnetometer Array Observation in the North-Eastern Izu Region after the Teisi Knoll Seafloor Eruption in 1989.

Oshiman¹,

Honkura²,

Sasai³

et al. 1991

J,Phys,Earth

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“…1) and analyzed to avoid as much as possible contamination from external magnetic fields. Reduction of these disturbances by taking simple differences between total field readings at space stations is unsatisfactory, because total field differences are dependent on the direction of the disturbing field (Davis et al, 1979). It is known that improvement is possible when three component observatory data are available from a station in the vicinity, but not necessarily immediate, of the total field array (Davis et al, 1981).…”

Section: Figmentioning

confidence: 99%

“…Differences in underground conductivity between two close (order of 10 km apart) sites will make the time variable fields different, even if the primary field from the magnetosphere is the same (Parkinson, 1983). On the other hand, variable induced magnetization, due to large susceptibility contrasts, could locally modify a magnetic disturbance field by an amount up to 5 nT (Davis et al, 1979).…”

Section: Introductionmentioning

confidence: 99%

Non-linear analysis of geomagnetic time series from Etna volcano

Currenti

Negro

Fortuna

et al. 2004

Nonlin. Processes Geophys.

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Abstract. An intensive nonlinear analysis of geomagnetic time series from the magnetic network on Etna volcano was carried out to investigate the dynamical behavior of magnetic anomalies in volcanic areas. The short-term predictability of the geomagnetic time series was evaluated to establish a possible low-dimensional deterministic dynamics. We estimated the predictive ability of both a nonlinear forecasting technique and a global autoregressive model by comparing the prediction errors. Our findings highlight that volcanomagnetic signals are the result of complex processes that cannot easily be predicted. There is slight evidence based on nonlinear predictions, that the geomagnetic time series are to be governed by many variables, whose time evolution could be better regarded as arising from complex high dimensional processes.

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“…Apparent tectonomagnetic effects have been obtained as a result of dam loading STACEY, 1972), volcanic eruptions (JOHNSTON andSTACEY, 1969;DAVIS et al, 1979) and crustal uplift (JOHNSTON et al, 1979;OHSHIMAN et al ., 1983). Table 2 shows a summary of these various results, including those from this study .…”

Section: Observationsmentioning

confidence: 99%

Local Magnetic Fields, Uplift, Gravity, and Dilational Strain Changes in Southern California

Johnston

1986

J. geomagn. geoelec

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Measurements of regional magnetic field during gravity, strain and leveling surveys near the San Andreas fault at Cajon, Palmdale and Tejon are strongly correlated with changes in gravity, areal strain, and uplift in these regions during the period 1977-1984. This correlation principally depends on data taken during 1978-79 and 1981-82 when episodes of the 'Palmdale Uplift' occurred in this general region. Because the inferred relationships between these parameters are in approximate agreement with those obtained from simple deformation models, the preferred explanation appeals to short-term strain episodes independently detected in each data set. Transfer functions from magnetic to strain, gravity, and uplift perturbations, and 9.1 nT/m respectively. Tectonomagnetic model calculations underestimate the observed changes and those reported previously for dam loading and volcanomagnetic observations. A less likely alternative explanation of the observed data appeals to a common source of meteorologically generated crustal or instrumental noise in the strain, gravity, magnetic, and uplift data.

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Improved signal discrimination in tectonomagnetism: Discovery of a volcanomagnetic effect at Kilauea, Hawaii

Cited by 40 publications

References 11 publications

Magnetometer Array Observation in the North-Eastern Izu Region after the Teisi Knoll Seafloor Eruption in 1989.

Magnetometer Array Observation in the North-Eastern Izu Region after the Teisi Knoll Seafloor Eruption in 1989.

Non-linear analysis of geomagnetic time series from Etna volcano

Local Magnetic Fields, Uplift, Gravity, and Dilational Strain Changes in Southern California

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