Naslov
Seismic Analysis of Moderate Size Earthquakes Recorded on Stations at Close Epicentral Distances

Autori
Sinadinovski, Cvetan ; Markušić, Snježana ; Stanko, Davor ; McCue, Kevin F. ; Prkevski, Lazo

Izvornik
Applied Sciences-Basel (2076-3417) 12 (2022), 1; 470, 14

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
earthquake records ; strong motion (SM) analysis ; response spectra ; Nakamura method

Sažetak
In this study, we analyzed the near-field seismic records of two moderate sized earthquakes in the Western Balkan region: the September 2016 Skopje earthquake, magnitude ML5.3 and the March 2020 Zagreb earthquake, magnitude ML5.5. Such recordings at close epicentral distances are rare and are thus very useful for testing some of the theoretical assumptions used in model-ing earthquake risk. Firstly, response spectra were computed using the digital time histories for the three closest stations to the Skopje 2016 earthquake and the two closest stations to the Zagreb 2020 earthquake. Their characteristics were examined in terms of frequency and peak amplitude ranges. Secondly, the Nakamura method was applied to the records from the selected five sta-tions coded SKO, FCE, IZIIS, QUHS, and QARH. The results of the spectral analysis were com-pared with interpretations from the geological and geotechnical maps at each location. Our findings support the idea that these combined methods can be used to categorize the underlying structural profile to a first approximation and can be used to derive velocity models.

Izvorni jezik
Engleski

Znanstvena područja
Geofizika

POVEZANOST RADA