Active seismotectonics of the East Anatolian Fault
نویسندگان
چکیده
SUMMARY The East Anatolian Fault (EAF) is a 700-km-long left-lateral transform fault located between the and Arabian plates. proximity of Euler Pole to Arabia–Anatolia Plate boundary leads rapid changes in plate velocity along boundary, which manifested by decreasing slip rates from east (10 mm yr–1) west (?1–4 yr–1). EAF displays heterogeneous seismicity patterns with seismic gaps, localized clusters broad diffuse zones. In this study, order understand origin these complexities quantify hazard EAF, we present an improved catalogue more than 26 000 earthquakes 160 focal mechanisms regional moment tensor inversion 2007 2020. show that dips towards north forms well-defined Palu Çelikhan almost pure motion. Further west, becomes broader activity subparallel faults. Focal stress orientations consistence geodetically determined strain rate field. transition strike-slip extension Çelikhan. Amongst all segments Pütürge segment, holds near-repeating vicinity nucleation 2020 Mw 6.8 earthquake, distinguished its steady high seismicity. east, neighbouring segment characterized several distinct moderate earthquakes. We do not observe any change on following large calculate recurrence time maximum magnitude for each using extended 150 yr including historical geodetic rate. results ?150 Mmax?6.7–7.0 seismically active while relatively silent western yield longer times; 237–772 Pazarc?k 414–917 Amanos slightly larger magnitudes (Mmax ?7–7.4). infer strain-rate field are shaped factors such as strong geometrical irregularities, coupling complex motion leading
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2022
ISSN: ['1365-246X', '0956-540X']
DOI: https://doi.org/10.1093/gji/ggac045