Volcanomagnetic variations related to the seismic crisis that occurred from December 1985 through May 1986 on the Montagne Pelee, Martinique (Lesser Antilles).

Zlotnicki, J.; Moreau, Marie-Gabrielle; Viodé, J. P.

doi:10.5636/jgg.39.487

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…Electrical and magnetic variations have been clearly measured and have been correlated with the volcanic activity on several volcanoes such as Mount Ruapehu (New Zealand) [ Johnson and Stacey , 1969], La Soufrière (Guadeloupe, Lesser Antilles.) [ Pozzi et al , 1979], Montagne Pelée (Martinique, Lesser Antilles) [ Zlotnicki et al , 1986, 1987, 1998], Piton de la Fournaise (Réunion, France) [ Zlotnicki and Le Mouël , 1988, 1990; Zlotnicki et al , 1993; Malengrau et al , 1994], Izu‐Oshima (Japan) [ Sasai et al , 1990], Unzen (Japan) [ Hashimoto and Tanaka , 1995], Etna (Italy) [ Del Negro et al , 1997]. These variations are presently monitored on various volcanoes and, in particular, on the three main French active volcanoes (La Soufrière, Montagne Pelée, Piton de la Fournaise).…”

Section: Introductionmentioning

confidence: 99%

Transport properties of pyroclastic rocks from Montagne Pelée volcano (Martinique, Lesser Antilles)

et al. 2007

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[1] The hydraulic and electrical properties of pyroclastic rocks have been investigated in laboratory on a representative sampling of Montagne Pelée (Martinique, France) deposits with renewed interest in geophysical applications. This sampling covers all the lithologic units of this volcano: lava dome and lava flows, pumices from ash-andpumice fall and flow deposits, lava blocks from block-and-ash flow and Peléean ''nuées ardentes'' deposits, scoriae from scoria flow deposits. The connected porosity varies over a wide range from 3 to 62%. The unconnected porosity is important only on pumices where it can reach 15%. The permeability covers more than 5 orders of magnitude, ranging from 10 À16 to 35 Â 10 À12 m 2 . The higher values are obtained on lava blocks and the scoriae, even if these rocks are less porous than the pumices. The formation factor ranges from 7 to 1139. The transport properties of these rocks are slightly correlated with porosity. This indicates that these properties are not only controlled by the connected porosity. To connect the transport properties to the textural characteristics of the pore network of pyroclastic rocks, different models, based on geometrical considerations or percolation theory, were tested. The pore access radius distribution and the tortuosity control the transport properties of pyroclastic rocks. Consequently, the models (electric and hydraulic) based on the concept of percolation (e.g., the models of Katz and Thompson), apply better than the equivalent channel model of Kozeny-Carman. In addition, the difference in transport properties observed on lava blocks and pumices confirms that the mechanisms of degassing and vesiculation are different for these two types of rock.

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Section: Introductionmentioning

confidence: 99%

Transport properties of pyroclastic rocks from Montagne Pelée volcano (Martinique, Lesser Antilles)

et al. 2007

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“…Changes in the local magnetic field of up to a few tens of nanoteslas (nT) have been reported during volcanic activity (Rikitake, 1951;Johnston and Stacey, 1969a, b;Pozzi et al, 1979;Johnston et al, 1981;Zlotnicki and Le Mouël, 1988;Honkura et al, 1995;Sasai et al, 1990;Zlotnicki et al, 1993;Tanaka, 1993Tanaka, , 1995. The available data indicate that small-amplitude magnetic signals of a few nT can occur at the most dangerous volcanoes, such as explosive andesitic volcanoes (Johnston et al, 1981;Davis et al, 1984;Zlotnicki, 1986;Zlotnicki et al, 1987;Tanaka, 1995;Zlotnicki and Bof, 1998), including Merapi Volcano, the most intensively monitored volcano in Indonesia.…”

Section: Higuchi's Fractal Dimension Methodsmentioning

confidence: 99%

Fractal dimension analysis of the magnetic time series associated with the volcanic activity of Popocatépetl

Márquez

Gálvez-Coyt

Nava

2012

Nonlin. Processes Geophys.

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Abstract. Fractal analysis of the total magnetic field (TMF) time series from 1997 to 2003 at Popocatépetl Volcano is performed and compared with the TMF-series of the Teoloyucan Magnetic Observatory, 100 km away. Using Higuchi's fractal dimension method (D). The D changes over time for both series were computed. It was observed, when the time windows used to compute D increase in length, both series show nearly the same behavior. Some criteria of comparison were employed to discriminate the local effects inherent to volcano-magnetism. The simultaneous maximum in D (1.8) of the TMF series at Popocatépetl Volcano and the recovered volcanic activity indicates a scaling relation of the TMF at Popocatépetl Volcano and demonstrates a link between the magnetic field and volcanic activity.

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Volcanomagnetic signals associated with the quasi-continuous activity of the andesitic Merapi volcano, Indonesia: 1990–1995

Zlotnicki

Bof

1998

Physics of the Earth and Planetary Interiors

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Volcanomagnetic variations related to the seismic crisis that occurred from December 1985 through May 1986 on the Montagne Pelee, Martinique (Lesser Antilles).

Cited by 5 publications

References 16 publications

Transport properties of pyroclastic rocks from Montagne Pelée volcano (Martinique, Lesser Antilles)

Transport properties of pyroclastic rocks from Montagne Pelée volcano (Martinique, Lesser Antilles)

Fractal dimension analysis of the magnetic time series associated with the volcanic activity of Popocatépetl

Volcanomagnetic signals associated with the quasi-continuous activity of the andesitic Merapi volcano, Indonesia: 1990–1995

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