Deep structure of arc volcanoes as inferred from seismic observations

A. Hasegawa, A. Yamamoto, D. Zhao, S. Hori, S. Horiuchi

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


Tomographic inversions for P-wave velocity clearly delineate low-velocity zones, which are inclined to the west and continuously distributed from the uppermost mantle to the upper crust beneath active volcanoes. Exceptionally deep (22-40km) microearthquakes are found at 10 locations around the low-velocity zones beneath active volcanoes. All these events have extremely low predominant frequencies, suggesting a closer relation to the magmatic activity in this depth range. At shallower depths (8-15km) distinct reflectors of S-waves from shallow events are found at five locations in or around the low-velocity zones. -from Authors

Original languageEnglish
Pages (from-to)167-178
Number of pages12
JournalPhilosophical transactions. Series A, Mathematical, physical, and engineering sciences
Issue number1663
Publication statusPublished - 1992


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