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Solar, geomagnetic and seismic activity

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Il Nuovo Cimento C

Summary

An 11-y modulation of large Italian earthquakes has been successfully identified and found to be positively linked to sunspot activity. The seismic activity appears to be modulated by the 11-y sunspot cycle through the coherent variation of geomagnetic activity. It is proposed that the two phenomena are linked by the influence of a magnetostriction process on stresses in the crust. An implication of this model is that geomagnetic storms may directly trigger large earthquakes.

Riassunto

L'analisi dei valori annuali delle macchie solari, della variazione geomagnetica interdiurna e dei grossi terremoti italiani ha permesso di identificare una significativa diretta modulazione undecennale dell'attività sismica da parte dell'attività solare attraverso la coerente variazione dell'attività geomagnetica con un relativo effetto magnetostrittivo sulle rocce crostali. Il modello proposto si rivela di pratica importanza per la previsione dei terremoti innescati da tempeste magnetiche.

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Authors and Affiliations

  1. Dipartimento di Geofisica e Vulcanologica dell'Università, Largo S. Marcellino 10, 80138, Napoli

    A. Mazzarella & A. Palumbo

Authors
  1. A. Mazzarella
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  2. A. Palumbo
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Mazzarella, A., Palumbo, A. Solar, geomagnetic and seismic activity. Il Nuovo Cimento C 11, 353–364 (1988). https://doi.org/10.1007/BF02533129

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  • DOI: https://doi.org/10.1007/BF02533129

PACS 91.30

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