Seismic velocity structure in and around the Naruko volcano, NE Japan, and its implications for volcanic and seismic activities Geofluid processes in subduction zones and mantle dynamics 4. Seismology

Tomomi Okada, Toru Matsuzawa, Junichi Nakajima, Naoki Uchida, Mare Yamamoto, Shuichiro Hori, Toshio Kono, Takashi Nakayama, Satoshi Hirahara, Akira Hasegawa

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Geofluids is important for understanding volcanic and earthquake generation processes. In this study, we obtained a detailed seismic velocity structure in and around the Naruko volcano, northeastern Japan, using data from a dense seismic observation network. We found a distinct seismic low-velocity zone (LVZ) beneath the Naruko volcano, with a diameter of nearly 10 to 20 km in the lower crust. This LVZ could correspond to a magma chamber. We also found a seismic low-velocity zone beneath the aftershock region of the 2008 Iwate-Miyagi Nairiku earthquake. This LVZ could correspond to an area with overpressurized fluid, which promoted the occurrence of the 2008 Iwate-Miyagi Nairiku earthquake.

Original languageEnglish
Article number114
Journalearth, planets and space
Volume66
Issue number1
DOIs
Publication statusPublished - 2014 Dec 1

Keywords

  • 2008 Iwate-Miyagi Nairiku earthquake
  • Geofluids
  • Naruko volcano
  • Seismic velocity structure
  • Seismicity

ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science

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