Fault Rupture Mapping of the 6 February 2023 Kahramanmaraş, Türkiye, Earthquake Sequence from Satellite Data (ver. 1.1, February 2024)
Dates
Publication Date
2023-06-15
Start Date
2023-02-06
End Date
2023-05-25
Revision
2024-02-09
Citation
Reitman, N.G., Briggs, R.W., Barnhart, W.D., Thompson Jobe, J.A., DuRoss, C.B., Hatem, A.E., Gold, R.D., Akçiz, S., Koehler, R.D., Mejstrik, J.D., Collett, C., 2023, Fault rupture mapping of the 6 February 2023 Kahramanmaraş, Türkiye, earthquake sequence from satellite data (ver. 1.1, February 2024): U.S. Geological Survey data release, https://doi.org/10.5066/P985I7U2.
Summary
This data release contains two datasets that depict fault rupture on the East Anatolian and Çardak faults resulting from the Mw7.8 and Mw7.5 earthquakes in Turkey (Türkiye). It contains two additional datasets that describe satellite imagery coverage and observation gaps. The 6 February 2023 earthquake sequence caused >500 km of combined surface rupture on the primarily left-lateral strike-slip East Anatolian and Çardak faults. The two datasets represent (1) simplified fault traces inferred from displacement discontinuities in interferometric synthetic aperture radar (InSAR) scenes mapped at 1:750,000 scale (“simple_faults”) and (2) detailed mapping of fault surface rupture observed on high-resolution (<1.0 m/pix) optical images from [...]
Updates to version 1.1: A minor update, version 1.1 contains new “simple_fault” and “surface_rupture lines” files. The “simple_fault” linework has been updated to include the correct orientation of the northern Narlı fault, checked on WorldView images and on the ground. The “surface_rupture_lines” linework has been updated with minor additional fault traces that were overlooked in v1.0 and updated locations of some surface rupture lines to agree with on-the-ground reconnaissance.
Disclaimer: "Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government."
Simple Faults
Simplified mapping of fault traces observed from displacement discontinuities in InSAR scenes. Mapping was performed at 1:750,000 scale from Sentinel-1 range and azimuth displacements obtained from pixel correlation with ~30 m pixel resolution (Copernicus Open Access Hub, 2023). The mapped fault traces are inferred from InSAR data and not directly observed. These simplified fault traces were adjusted to be co-located with the detailed surface rupture mapping. The “earthquake” field denotes if the feature is related to the Mw7.8 or Mw7.5 earthquake. The InSAR sub-pixel offsets are available in a USGS data release (Goldberg et al., 2023). The file is called “SAR sub-pixel offsets of February 2023 Kahramanmaras, Türkiye, Earthquake Sequence”.
References
Copernicus Open Access Hub, 2023, Copernicus Sentinel-1 data. Retrieved from Copernicus SciHub and ASF DAAC February 2023, processed by ESA. https://scihub.copernicus.eu/
Goldberg, Tuncay Taymaz, William L. Yeck, William D. Barnhart, Seda Yolsal-Çevikbilen, Tahir Serkan Irmak, Taylan Öcalan, Berkan Özkan, Ceyhun Erman, Ali Hasan Doan, and Cemali Altunta, 2023, Supporting data and models for characterizing the February 2023 Kahramanmaras, Türkiye, earthquake sequence: U.S. Geological Survey data release, https://doi.org/10.5066/P9R6DSVZ
Maxar, 2023, Worldview 1, 2, and 3 data. Retrieved between 6 February and 1 May 2023.
These data were mapped rapidly following the 6 February 2023 earthquakes to support scientific and humanitarian response to the earthquakes. Initial preliminary rupture traces were released to the public via a webmap on 10 February 2023. The datasets were subsequently updated and iterated as new optical and radar satellite images became available in the days and weeks following the earthquakes. The current version of the dataset has undergone a quality control process to ensure that only tectonic features are included and that mapped traces are as accurate as possible to true locations on the ground; however, we cannot guarantee that all mapped lines correspond exactly to their locations on the ground due to the variable accuracy of georectified satellite images.
Revision 1.1 by Nadine G. Reitman on February 9, 2024. To review the changes that were made, see “V1.1 Summary of Changes.txt” in the attached files section.
