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Volume 57 Supplement 10

Special Issue: Slow Slip Events at Plate Subduction Zones

Repeating short- and long-term slow slip events with deep tremor activity around the Bungo channel region, southwest Japan

Earth, Planets and Space volume 57, pages 961–972 (2005)Cite this article

Abstract

We report the repeating occurrence of short- and long-term slow slip events (SSE) which are accompanied by deep tremor activity around the Bungo channel region, southwest Japan. Both of these activities are detected by NIED Hi-net, which is composed of densely distributed observatories equipped with a set of tiltmeter and a high-sensitivity seismograph. Since the short-term SSE is small in magnitude, GPS can detect only the long-term SSE. Some of these episodes have nearly the same surface deformation pattern. This shows the existence of ‘slow slip patches’ on a plate interface, where the episodic slow slip is the characteristic slip behavior. We observe a change in periodicity and size of the short-term episode after the onset of the long-term SSE. Moreover, the long-term slow slip accelerates when the short-term activity takes place. This suggests that there is an interaction between these two types of SSEs.

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Authors and Affiliations

  1. National Research Institute for Earth Science and Disaster Prevention, 3-1 Tenno-dai, Tsukuba, Ibaraki, Japan

    Hitoshi Hirose & Kazushige Obara

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  1. Hitoshi Hirose
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  2. Kazushige Obara
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Correspondence to Hitoshi Hirose.

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Hirose, H., Obara, K. Repeating short- and long-term slow slip events with deep tremor activity around the Bungo channel region, southwest Japan. Earth Planet Sp 57, 961–972 (2005). https://doi.org/10.1186/BF03351875

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  • DOI: https://doi.org/10.1186/BF03351875

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