5:15 PM - 7:15 PM
[SCG44-P07] Preliminary thermoluminescence measurement of the samples collected near displacement caused by ”The 2024 Noto Peninsula Earthquake”
Keywords:luminescence, The Noto Peninsula earthquake of 2024, Thermoluminescence, fault
The Noto Peninsula earthquake of 2024 (M7.6) was a massive event that triggered a tsunami, with tremors felt across areas from Hokkaido to Kyushu. The mechanism of this earthquake is characterized by reverse faulting, with a northwest-southeast pressure axis and the multiple ruptures along active faults over a region approximately 150 km in length.
A 6.8 km-long displacement with a steep vertical cliff approximately 1-2 m in height was observed along the Wakayama River, in the inland area of Suzu City, during the field surveys (Shirahama, 2024). Since this surface deformation was not present in pre-earthquake aerial photographs, it is likely that it formed at the time of or shortly after the Noto earthquake. These faults are approximately 10 km away from the epicenter, making them unlikely to be the active seismic fault responsible for the Noto Earthquake. To investigate the cause of the surface deformation and better understand its deformation history, Kanazawa University and the University of Toyama conducted the trench survey. The survey revealed subsurface faulting displacements, which may have resulted from multiple rounds of faulting (Yasue et al., 2024).
In this study, we plan to investigate the thermoluminescence (TL) and optically stimulated luminescence (OSL) of basement rock and fault-related samples collected from this trench to examine the effects of displacement formation on the surrounding rocks. The TL glow curves of samples near the displacement differed from those of the basement rock samples, suggesting that the displacement could have caused this difference.
A 6.8 km-long displacement with a steep vertical cliff approximately 1-2 m in height was observed along the Wakayama River, in the inland area of Suzu City, during the field surveys (Shirahama, 2024). Since this surface deformation was not present in pre-earthquake aerial photographs, it is likely that it formed at the time of or shortly after the Noto earthquake. These faults are approximately 10 km away from the epicenter, making them unlikely to be the active seismic fault responsible for the Noto Earthquake. To investigate the cause of the surface deformation and better understand its deformation history, Kanazawa University and the University of Toyama conducted the trench survey. The survey revealed subsurface faulting displacements, which may have resulted from multiple rounds of faulting (Yasue et al., 2024).
In this study, we plan to investigate the thermoluminescence (TL) and optically stimulated luminescence (OSL) of basement rock and fault-related samples collected from this trench to examine the effects of displacement formation on the surrounding rocks. The TL glow curves of samples near the displacement differed from those of the basement rock samples, suggesting that the displacement could have caused this difference.