A review of shallow slow earthquakes along the Nankai Trough

S Takemura, Y Hamada, H Okuda, Y Okada… - Earth, Planets and …, 2023 - Springer
Slow earthquakes occur at deep and shallow plate boundaries along the Nankai Trough.
Deep slow earthquakes are continuously distributed along the 30–40 km depth contours of …

Spatiotemporal variations of shallow very low frequency earthquake activity southeast off the Kii Peninsula, along the Nankai Trough, Japan

S Takemura, K Obara, K Shiomi… - Journal of Geophysical …, 2022 - Wiley Online Library
Cross‐correlation analysis was applied to long‐term onshore broadband records from April
2004 to March 2021 to detect and relocate shallow very low frequency earthquakes (VLFEs) …

Energy‐based scenarios for great thrust‐type earthquakes in the Nankai trough subduction zone, southwest Japan, using an interseismic slip‐deficit model

A Noda, T Saito, E Fukuyama… - Journal of Geophysical …, 2021 - Wiley Online Library
We propose a new energy‐based method to construct rupture scenarios for anticipated
megathrust earthquakes by using an interseismic slip‐deficit model. Our method bridges the …

Impact of the offshore seismograph network and 3‐D seismic velocity structure model on centroid moment tensor analysis for offshore earthquakes: Application to the …

L Yamaya, H Kubo, K Shiomi… - Journal of Geophysical …, 2024 - Wiley Online Library
Recently, a widespread and densely continuous‐recording ocean‐bottom seismograph
network has been deployed in the Japan Trench subduction zone. Utilizing the offshore …

Revisiting seismic energy of shallow tremors: Amplifications due to site and propagation path effects near the Nankai Trough

S Takemura, K Emoto, S Yabe - Journal of Geophysical …, 2024 - Wiley Online Library
We investigated the effects of the propagation path and site amplification of shallow tremors
along the Nankai Trough. Using far‐field S‐wave propagation from intraslab earthquake …

Mechanically coupled areas on the plate interface in the Nankai Trough, Japan and a possible seismic and aseismic rupture scenario for megathrust earthquakes

T Saito, A Noda - Journal of Geophysical Research: Solid Earth, 2022 - Wiley Online Library
Quantifying the stress distribution or finding mechanically coupled areas on the plate
interface is fundamentally important for conjecturing megathrust earthquakes that may occur …

Bayesian Seismic Source Inversion With a 3‐D Earth Model of the Japanese Islands

S Simutė, C Boehm, L Krischer… - Journal of …, 2023 - Wiley Online Library
We present probabilistic centroid‐moment tensor solutions inferred from the combination of
Hamiltonian Monte Carlo sampling and a 3‐D full‐waveform inversion Earth model of the …

Modelling high-frequency seismograms at ocean bottom seismometers: effects of heterogeneous structures on source parameter estimation for small offshore …

S Takemura, S Yabe, K Emoto - Geophysical Journal …, 2020 - academic.oup.com
The source characteristics of offshore seismic events, especially regular (or fast) and slow
earthquakes, can provide key information on their source physics and frictional conditions at …

Source characteristics and along‐strike variations of shallow very low frequency earthquake swarms on the Nankai Trough shallow plate boundary

S Takemura, S Baba, S Yabe, K Emoto… - Geophysical …, 2022 - Wiley Online Library
We detected shallow very low frequency earthquakes (VLFEs) off the Cape Muroto and Kii
Channel in the Nankai subduction zone and estimated their moment rate functions …

High-frequency S and S-coda waves at ocean-bottom seismometers

S Takemura, K Emoto, L Yamaya - earth, planets and space, 2023 - Springer
To clarify the characteristics of high-frequency (> 1 Hz) S and S-coda waves at ocean-bottom
seismometers (OBSs), we analyzed seismograms observed at permanent OBSs and inland …