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Precise, NLL-SSST-coherence earthquake relocations for the 2023 Mw7.8 and Mw7.6, Kahramanmaraş-Gaziantep, Turkey earthquake sequence (including 2020 Mw 6.8 Elazığ, Turkey sequence). Seismic arrival data from afad.gov.tr. Details & catalog available at: doi.org/10.5281/zenodo.7699881

Image shows 16,762 events 2020-01-01 to 2023-03-04 with err ≤ 9km

Cyan: before 2023-01-01; includes 2020 Mw6.8 Elazığ, Turkey sequence
Green-Yellow: before 2023-02-06 M7.8 event
Red: from 2023-02-06 01h17 UTC M7.8 through 10h24 UTC M7.6
Magenta: after 2023-02-06 10h24 UTC M 7.6

NLL-SSST-coherence (doi.org/10.1029/2021JB023190) is an enhanced, absolute-timing earthquake location procedure which 1) iteratively generates spatially varying travel-time corrections to improve multi-scale precision and 2) uses waveform similarity to improve fine-scale precision.

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