Shear‐wave polarization anisotropy beneath the north‐eastern part of Honshu, Japan

Tomomi Okada, Toru Matsuzawa, Akira Hasegawa

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

We have investigated the shear‐wave polarization anisotropy in the north‐eastern Japan arc by using waveforms from many local earthquakes at various depths. We used a cross‐correlation method to detect the shear‐wave splitting. For intermediate‐depth and deep events, the observed fast shear‐wave oscillation directions (FSODs) are oriented parallel to the dip direction of the slab at the western stations, while they are oriented perpendicular to the dip direction at the eastern stations. These observations indicate that significant anisotropy exists in the mantle wedge, and that its nature is quite different between the eastern and the western parts.

Original languageEnglish
Pages (from-to)781-797
Number of pages17
JournalGeophysical Journal International
Volume123
Issue number3
DOIs
Publication statusPublished - 1995 Dec

Keywords

  • anisotropy
  • low‐velocity zone
  • mantle wedge
  • north‐eastern Japan arc
  • shear‐wave splitting
  • subduction zone

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Fingerprint Dive into the research topics of 'Shear‐wave polarization anisotropy beneath the north‐eastern part of Honshu, Japan'. Together they form a unique fingerprint.

Cite this