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Investigating the Türkiye-Syria and Afghanistan 2023 Seismic Sequences

Description: 

We present our results for the strong earthquakes in Türkiye-Syria and Afghanistan that occurred in 2023. For the former, our analysis incorporates InSAR results derived from the SAOCOM-1, Sentinel-1 and ALOS-2 satellites. We applied both conventional interferometry and the Pixel Offset tracking technique to quantify surface deformations caused by the impactful earthquakes, resulting in substantial structural failures and multiple fatalities. Employing a combination of non-linear and linear inversions, we utilised high-resolution Synthetic Aperture Radar (SAR)-based datasets as input. This facilitated the creation of two meticulously segmented variable slip fault models for the M 7.8 and M 7.5 events, employing a multiscale sampling approach to fully harness the potential of the high-resolution radar data. This approach allowed for a detailed examination and definition of the specific characteristics of each segment of the extensive tectonic structures that triggered the events on the 6th of February 2023. Subsequently, this model was employed to examine the distribution of the intensity of ground motions in the affected region. In the context of the northwestern Afghanistan sequence, we processed Sentinel-1 SAR data from both Ascending and Descending orbits to estimate surface displacement using the InSAR technique. Through a sequential application of non-linear and linear optimization, we identified the causative faults for the sequence of three M 6.4 events occurring on 7, 11, and 15 October.

Session: Illuminating Complex, Multiplet Earthquake Sequences at Kahramanmaras (Turkiye), Herat (Afghanistan), and Beyond [Poster Session]

Type: Poster

Date: 5/2/2024

Presentation Time: 08:00 AM (local time)

Presenting Author: Nikos

Student Presenter: No

Invited Presentation: 

Authors