Ambient Seismic Noise Image of the Structurally Controlled Heat and Fluid Feeder Pathway at Campi Flegrei Caldera

L. De Siena, C. Sammarco, D. G. Cornwell, M. La Rocca, F. Bianco, L. Zaccarelli, H. Nakahara

研究成果: Article査読

12 被引用数 (Scopus)

抄録

Earthquakes at Campi Flegrei have been low magnitude and sparse since 1985, denying onshore monitoring observations of their usual source for structural constraint: seismic tomography. Here we used continuous seismic records from 2011–2013 to reconstruct period-dependent Rayleigh wave group velocity maps of the volcano. The Neapolitan Yellow Tuff rim faults bound high-velocity intracrater products of historical eruptions, which act as a barrier for deep fluid migration. The anomaly with lowest group velocity is aseismic and corresponds to the portion of a fluid storage zone that was fractured during the 1984 volcanic unrest under Pozzuoli town. Earthquake locations show that fluids migrate from this area toward the Solfatara and Pisciarelli fumaroles along shallower low-velocity fractures. The aseismic anomaly is likely fed by a deep-seated offshore magmatic source. Its spatial relation with regional dynamics and observations from historical unrests mark the area as the most likely feeder pathway for fluid and magmatic inputs from depth.

本文言語English
ページ(範囲)6428-6436
ページ数9
ジャーナルGeophysical Research Letters
45
13
DOI
出版ステータスPublished - 2018 7月 16

ASJC Scopus subject areas

  • 地球物理学
  • 地球惑星科学(全般)

フィンガープリント

「Ambient Seismic Noise Image of the Structurally Controlled Heat and Fluid Feeder Pathway at Campi Flegrei Caldera」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル