STAR-E

I joined the Japan Geoscience Union (JpGU) Meeting 2025 , held at the Makuhari Messe in Chiba, JP, from 25 to 30 May 2025. I made an oral and a poster presentations.

• [SSS12-18] “Intraslab reverse faulting adjacent to the hypocenter of the 1923 Kanto earthquake: The Mw 5.0 western Kanagawa earthquake on 9 August 2024” by Sawaki, Y., T. Shiina, and T. Uchide
• [SSS06-P01] “Mutsu Bay Seismic Cluster along the Volcanic Front in November 2024” by Sawaki, Y., K. Sagae, T. Shiina, K. Imanishi, and T. Uchide

We have posted a new preprint on the fault geometry for the Mw 5.0 western Kanagawa earthquake in eastern Japan on 9 August 2024. This is a preprint (peer-review not completed), but feel free to check it out!

Sawaki, Y., T. Shiina, and T. Uchide. Intraslab reverse faulting adjacent to the hypocenter of the 1923 Kanto earthquake: The Mw 5.0 western Kanagawa earthquake in eastern Japan on 9 August 2024 [Preprint v1]. Research Square. https://doi.org/10.21203/rs.3.rs-6353744/v1

We have estimated the fault geometry of the 2024 Noto Peninsula Earthquake in central Japan on 1 January 2024. Our analysis reveals major and minor fault planes aligned along the coastline beneath the peninsula. Notably, we identified a more counter-clockwise rotated plane in eastern Wajima and an east-dipping plane along the west coast. These localized structural complexities suggest intricate fault slip behavior and exhibit a strong correlation with gravity anomalies and geological structures. This research contributes to a deeper understanding of the formation and seismotectonics of the Noto Peninsula.

We also won the AIST President Award 2024 related to Contribution to National Earthquake Disaster Prevention Measures: Response to the 2024 Noto Peninsula Earthquake (in Japanese)!

Check the paper and software below!

• Sawaki, Y., T. Shiina, K. Sagae, Y. Sato, H. Horikawa, A. Miyakawa, K. Imanishi, and T. Uchide (2025). Fault Geometries of the 2024 Mw 7.5 Noto Peninsula Earthquake from Hypocenter-Based Hierarchical Clustering of Point-Cloud Normal Vectors. Journal of Geophysical Research: Solid Earth, 130, e2024JB030233. doi: 10.1029/2024JB030233 (Open Access)
• Sawaki, Y., Y. Sato, and T. Uchide (2025). FaultNVC: Earthquake Fault Plane Extractor through Point-Cloud Normal Vector Clustering for Hypocenter Distributions [Software]. Open-File Report of Geological Survey of Japan, AIST, no. 759. https://www.gsj.jp/publications/pub/openfile/openfile0759.html

I participated in American Geophysics Union Annual Meeting 2024 held in Washington D.C. during 9–13 December 2024 and gave an oral talk about the fault geometry of the 2024 Mw 7.5 Noto Peninsula Earthquake. Interactions with researchers and students ignited my passion for further research.

I participated in the 2024 Seismological Society of Japan (SSJ) Fall Meeting , held at the Toki Messe in Niigata City, JP, from Oct. 21 to 23. I made a following oral presentation.

• S22-03 “Fault Geometries of the 2024 Mw 7.5 Noto Peninsula Earthquake from Hypocenter-Based Hierarchical Clustering” Sawaki et al.

I participated in the Japan Geoscience Union (JpGU) Meeting 2024 , held at the Makuhari Messe in Chiba, JP, from May 26 to 31. I made two presentations: one for oral and the other for poster.

• [SCG50-02] Multiscale Fault Estimation in California and Oklahoma. Sawaki, Y., D. Shelly, T. Uchide, K. Sagae, T. Shiina, Y. Sato, and H. Horikawa
• [U15-P09] Fault geometries of the 2024 Noto Peninsula earthquake estimated by hypocenter clustering. Sawaki, Y., T. Uchide, T. Shiina, K. Sagae, H. Horikawa, and K. Imanishi

I participated in the AGU Fall Meeting 2023 held at San Francisco during December 11–15. We had a good poster presentation with lively discussions with worldwide researchers. I can’t wait the next opportunity to interact with you all!

I visited the United States Geological Survey in Golden, CO for a month and conducted collaborative studies with Dr. David Shelly. It was a fantastic stay and a good opportunity to proceed my research.

I’m going to San Francisco for the upcoming meeting of American Geophysical Union. I have a poster presentation related to my current study .

I start a new research life as a postdoc in the Geological Survey of Japan (AIST) in April. My job is to participate in the STAR-E (Seismology TowArd Research innovation with data of Earthquake) project organized by the Ministry of Education, Culture, Sports, Science and Technology in Japan.