Characteristics and interactions between non-volcanic tremor and related slow earthquakes in the Nankai subduction zone, southwest Japan

Obara, Kazushige

doi:10.1016/j.jog.2011.04.002

Cited by 99 publications

(138 citation statements)

References 129 publications

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“…Such a difference may reflect the variation in frictional properties that are controlled by changes in temperature, fluid content, and structural and rheological properties (Obara, 2011), providing a constraint to understand slip phenomena on the plate interface.…”

Section: Methodsmentioning

confidence: 99%

Average slip rate at the transition zone on the plate interface beneath the Kii Peninsula, Japan, estimated from deep low-frequency tremors

et al. 2013

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We investigated the average slip rate at the transition zone on the plate interface beneath the Kii Peninsula, Japan, using an empirical method based on a proportional relation of sizes between short-term slow slip events and nonvolcanic deep low-frequency tremors. The estimated average slip rates are 3.0±0.4 cm/yr, 2.6±0.4 cm/yr, and 2.4±0.4 cm/yr, in the northern, central, and southern Kii Peninsula, respectively. Values in the northern and the central areas compensate for the difference between the slip deficit rate at the transition zone and the convergence rate of the subducting Philippine Sea plate. The discrepancy among those rates is, however, large in the southern area, suggesting a lateral variation in the proportional relation or the existence of a steady, or quasi-steady, slip.

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Section: Methodsmentioning

confidence: 99%

Average slip rate at the transition zone on the plate interface beneath the Kii Peninsula, Japan, estimated from deep low-frequency tremors

et al. 2013

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“…Short-term slow slip events (SSEs) with durations on the order of days accompanied by tremors and very low frequency (VLF) earthquakes, long-term SSEs with durations on the order of years, and shallow VLF earthquakes are observed along the Nankai Trough. Long-term SSEs are a type of slow earthquake, which occurs adjacent to the locked area of the Nankai Trough subduction zone, with magnitudes larger than other slow earthquakes (Obara 2011). During 2 decades of GNSS operation along the Nankai Trough, long-term SSEs have been repeatedly observed in the Bungo Channel west of Shikoku Island and in the Tokai region (Fig.…”

Section: Introductionmentioning

confidence: 99%

Objective detection of long-term slow slip events along the Nankai Trough using GNSS data (1996–2016)

Kobayashi¹

2017

Earth Planets Space

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This paper presents a method for objective detection of long-term slow slip events with durations on the order of years, on the plate boundary along the Nankai Trough, relying on global navigation satellite system daily coordinate data. The Chugoku region of Japan was held fixed to remove common mode errors, and a displacement component was calculated relative to the direction of plate subduction. Correlations were then calculated between this displacement component and a 3-year ramp function with a 1-year slope. Nearly all periods of strong correlation coincide with periods of previously reported long-term slow slip events. A period of strong correlation around the Kii Channel in 2000-2002 is attributed to a previously undocumented long-term slow slip event beneath the Kii Channel and the eastern part of Shikoku Island with an equivalent moment magnitude of 6.6. This detection method reveals variation among long-term slow slip events along the Nankai Trough.

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“…In the Nankai Trough, SSEs with durations of several days are called short-term SSEs, and SSEs with durations of several months or years are called long-term SSEs (Obara 2011). The ETS phenomena consist of tremor episodes, deep very-low-frequency earthquakes, and shortterm SSEs in southwestern Japan (Obara 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The ETS phenomena consist of tremor episodes, deep very-low-frequency earthquakes, and shortterm SSEs in southwestern Japan (Obara 2011). The slip area for long-term SSEs lies between the slip area of ETS events and the source region of large earthquakes (Obara 2011).…”

Section: Introductionmentioning

confidence: 99%

A long-term slow slip event from 1996 to 1997 in the Kii Channel, Japan

Kobayashi

2014

Earth Planet Sp

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Characteristics and interactions between non-volcanic tremor and related slow earthquakes in the Nankai subduction zone, southwest Japan

Cited by 99 publications

References 129 publications

Average slip rate at the transition zone on the plate interface beneath the Kii Peninsula, Japan, estimated from deep low-frequency tremors

Average slip rate at the transition zone on the plate interface beneath the Kii Peninsula, Japan, estimated from deep low-frequency tremors

Objective detection of long-term slow slip events along the Nankai Trough using GNSS data (1996–2016)

A long-term slow slip event from 1996 to 1997 in the Kii Channel, Japan

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