Hiroshi Yakiwara
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View article: Non-double-couple components of the 2024 Noto earthquake aftershocks: influence on focal mechanism estimation
Non-double-couple components of the 2024 Noto earthquake aftershocks: influence on focal mechanism estimation Open
Aftershocks of the 2024 Noto earthquake exhibited a notable discrepancy between focal mechanisms estimated from P-wave polarities and those derived from routine moment tensor (MT) analyses based on waveform inversion of regional data. Whil…
View article: Shear wave splitting and seismic velocity structure in the onshore focal area of the 2024 Noto Peninsula earthquake, central Japan, as a fluid-promoted multifault rupture in a compressional inversion area
Shear wave splitting and seismic velocity structure in the onshore focal area of the 2024 Noto Peninsula earthquake, central Japan, as a fluid-promoted multifault rupture in a compressional inversion area Open
The M7.6 Noto Peninsula earthquake occurred on 1 January 2024 in the Noto region of Ishikawa Prefecture. Several faults successively ruptured during the 2024 Noto Peninsula earthquake. Seismic activity in the area has increased since appro…
View article: Spatiotemporal variation of aftershock activity in northern source region of the 2011 Tohoku-oki earthquake by long-term ocean bottom seismometers
Spatiotemporal variation of aftershock activity in northern source region of the 2011 Tohoku-oki earthquake by long-term ocean bottom seismometers Open
A huge plate boundary earthquake eventuated between the Pacific plate and the landward plate in 2011 and was named the 2011 off the Pacific coast of Tohoku earthquake. Following the mainshock, many aftershocks were generated. It is essenti…
View article: Magmatic system of the Kikai submarine caldera, SW Japan, imaged by passive seismic tomography
Magmatic system of the Kikai submarine caldera, SW Japan, imaged by passive seismic tomography Open
View article: Precise aftershock activity in the marine source region of the 2024 Noto-Hanto earthquake by rapid response observation using ocean bottom seismometers
Precise aftershock activity in the marine source region of the 2024 Noto-Hanto earthquake by rapid response observation using ocean bottom seismometers Open
The 2024 Noto-Hanto earthquake with a magnitude of 7.6 occurred in the Noto Peninsula on January 1, 2024. The mainshock had a reverse fault focal solution and direction of compression axis was the northwest–southeast. In the Noto Peninsula…
View article: Magmatic System of the Kikai Submarine Caldera, Sw Japan, Imaged by Passive Seismic Tomography
Magmatic System of the Kikai Submarine Caldera, Sw Japan, Imaged by Passive Seismic Tomography Open
View article: Stress field in northeastern Japan and its relationship with faults of recent earthquakes
Stress field in northeastern Japan and its relationship with faults of recent earthquakes Open
Inversion tectonics, in which old normal faults act as reverse faults in current stress fields, are frequently observed in northeastern Japan (Tohoku District); however, the conditions that control these fault activities remain unclear. To…
View article: Solidified magma reservoir derived from active source seismic experiments in the Aira caldera, southern Kyushu, Japan
Solidified magma reservoir derived from active source seismic experiments in the Aira caldera, southern Kyushu, Japan Open
The Aira caldera, located in southern Kyushu, Japan, originally formed 100 ka, and its current shape reflects the more recent 30 ka caldera-forming eruptions (hereafter, called the AT eruptions). This study aimed to delineate the detailed …
View article: Stress field in the northeastern Japan and its relationship with faults of recent earthquakes
Stress field in the northeastern Japan and its relationship with faults of recent earthquakes Open
Inversion tectonics, an old normal fault that acts as a reverse fault in the current stress field, is frequently observed in northeastern Japan (Tohoku District). Furthermore, new reverse faults that formed in the current stress field are …
View article: Solidified magma reservoir derived from seismic exploration in the Aira caldera, southern Kyushu, Japan
Solidified magma reservoir derived from seismic exploration in the Aira caldera, southern Kyushu, Japan Open
Seismic exploration was conducted along a profile running through the Aira caldera located in southern Kyushu, Japan. The caldera was formed by an ignimbrite eruption approximately 30 ka BP, namely, the “AT eruption,” which produced the It…
View article: QiQs_shito2020
QiQs_shito2020 Open
QiQs structures obtained by Shito et al. (2020, submitted to JGR).
View article: QiQs_shito2020
QiQs_shito2020 Open
QiQs structures obtained by Shito et al. (2020, submitted to JGR).
View article: Seismic Observations using Ocean Bottom Seismometers around Kuchierabujima Volcano
Seismic Observations using Ocean Bottom Seismometers around Kuchierabujima Volcano Open
The remarkable eruption on Kuchierabujima, which occurred on May 29, 2015, had the potential to disrupt land seismic observation if the volcanic activities had expanded. Since relatively deep-volcano-tectonic (DVT) earthquakes under the vo…
View article: A subsurface structure change associated with the eruptive activity at Sakurajima Volcano, Japan, inferred from an accurately controlled source
A subsurface structure change associated with the eruptive activity at Sakurajima Volcano, Japan, inferred from an accurately controlled source Open
Temporal variations of Green functions associated with the eruptive activity at Sakurajima Volcano, Japan, were estimated using an accurately controlled routinely operated signal system (ACROSS). We deconvolved 400 s waveforms of the ACROS…