[O-09] Mechanism of the 2024 Noto Peninsula Earthquake and its disaster

[O09-07] Submarine active faults around the northern part of Noto Peninsula

★Invited Papers

*Takahiko Inoue¹, Yukinobu Okamura², Tomoyuki SATO¹, Takashi OGAMI² (1.Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology, 2.Research Institute of Earthquake and Volcano Geology, National Institute of Advanced Industrial Science and Technology)

Keywords:Noto Peninsula Earthquake, submarine active fault, seismic profiling survey

The Noto Peninsula is located in a tectonic contraction zone, and many earthquakes have recently occurred in the region, including the 1993 Off Noto Peninsula Offshore Earthquake and the 2007 Noto Peninsula Earthquake. Among them, the Noto Peninsula earthquake on 1st, January 2024 (the 2024 Noto Peninsula earthquake) was the largest seismic event with a 7.5 magnitude (Mw) mainshock.
AIST had conducted seismic reflection profiling surveys using an air gun system in the sea area around the Noto Peninsula to construct of marine geological maps around Japan (Okamura, 2002, 2007). In response to the 2007 Noto Peninsula earthquake, high-resolution reflection surveys using a boomer source were conducted in the coastal area around the northern Noto Peninsula in 2007 and 2008, and the distribution of active faults in shallow marine area around the northern part of Noto Peninsula has been clarified (Inoue & Okamura, 2010). In this presentation, we introduce survey methods of offshore active faults, distribution of the active faults in the sea area around the Northern part of Noto Peninsula, and surveys results around the Noto Peninsula after the 2024 earthquake.

Inoue and Okamura (2010) https://www.gsj.jp/researches/project/coastal-geology/results/s-1.html.
Okamura (2002) Geological Map East of Noto Peninsula, Marine Geology Map Series 59, AIST.
Okamura (2007) Geological Map West of Noto Peninsula, Marine Geology Map Series 61, AIST