What question did this study set out to answer?

Investigate how historical land classifications and local geotechnical soil characteristics influenced ground deformation and structural damage patterns following major earthquake shaking.

August 15, 2026Geoenvironmental DisastersOpen Access

Geotechnical field measurements and structural damage in Iskenderun following the 2023 Turkey-Kahramanmaras earthquake sequence

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Authors

MSMasataka ShigaTokyo Metropolitan University TKTakashi KiyotaThe University of Tokyo TTTetsuo TobitaKansai University

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Field investigation reveals land-class-dependent geotechnical ground failures and structural damage across coastal zones, indicating strong correlations between soil history and earthquake...

Key Points

Investigate how historical land classifications and local geotechnical soil characteristics influenced ground deformation and structural damage patterns following major earthquake shaking.
Categorized urban terrain using an 1896 historical map into old city center, reclaimed coastal land, former marshland, and canal channels.
Conducted post-earthquake visual damage inspections and in-situ geotechnical testing, including portable dynamic cone penetration testing (PDCPT), multi-channel analysis of surface waves (MASW), and microtremor horizontal-to-vertical spectral ratio (HVSR) measurements.
Recorded a peak ground acceleration of 290 cm/s², with response spectra exceeding the Turkish Building Earthquake Code DD-2 design level.
Identified low near-surface shear wave velocities of 100–140 m/s (increasing to 185 m/s at 10 m depth) and HVSR predominant frequencies below 1 Hz on reclaimed land, where lateral spreading and inundation occurred.
Observed severe structural building damage concentrated in former marshlands, while geotechnical ground failure spatially overlapped with a low-amplitude HVSR zone on reclaimed soils.

Cite This Study

Shiga et al. (2026) studied this question.

synapsesocial.com/papers/6a8019ce75c2e31742c85e90 https://doi.org/10.1186/s40677-026-00403-6

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Implication

Field investigation reveals land-class-dependent geotechnical ground failures and structural damage across coastal zones, indicating strong correlations between soil history and earthquake...

Geotechnical field measurements and structural damage in Iskenderun following the 2023 Turkey-Kahramanmaras earthquake sequence

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Implication

Key Points

Cite This Study

Geotechnical field measurements and structural damage in Iskenderun following the 2023 Turkey-Kahramanmaras earthquake sequence

Discussion

Member takes

Implication

Key Points

Cite This Study

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