Seismotectonic Deformation of Active Segments of the Junction Zone of the Kolyma–Omolon Superterrane and South Anui Suture (Southeastern Russia)

Crustal Stresses in the East Arctic Region From New Data on Earthquake Focal Mechanisms

“…Seismic moment tensors in a double-couple approximation and source depths are calculated for 103 earthquakes occurred in East Arctic in 1990-2021 (Figure 1, Table S1) applying the method by Bukchin (1990), described in detail in Lasserre et al (2001) and Filippova et al (2022) and presented in Text S1 of Supporting Information S1. Source parameters for 22 earthquakes, located in the Laptev Sea and its framework, have been determined in our previous studies (Imaeva et al, 2021;Seredkina & Kozmin, 2017;Seredkina & Melnikova, 2018), but, they are also considered as they are essential for stress tensor calculations and discussion.…”

“…(2022) and presented in Text S1 of Supporting Information S1. Source parameters for 22 earthquakes, located in the Laptev Sea and its framework, have been determined in our previous studies (Imaeva et al., 2021; Imaeva, Imaev, et al., 2017; Seredkina & Kozmin, 2017; Seredkina & Melnikova, 2018), but, they are also considered as they are essential for stress tensor calculations and discussion.…”

“…same method (Imaeva et al, 2021;Seredkina & Kozmin, 2017;Seredkina & Melnikova, 2018). Possible geodynamic insights of the results (both stress tensors and individual focal mechanisms) are discussed.…”

“…Source parameters are calculated from surface wave amplitude spectra for the first time for 81 seismic events with Mw ≥ 4.2 (1990–2021) (Table S1). We aslo use the data for 22 earthquakes (Mw ≥ 4.2, 1990–2015) considered in our previous studies with the same method (Imaeva et al., 2021; Imaeva, Imaev, et al., 2017; Seredkina & Kozmin, 2017; Seredkina & Melnikova, 2018). Possible geodynamic insights of the results (both stress tensors and individual focal mechanisms) are discussed.…”