Procjena seizmičkog hazarda na području Hrvatske primjenom programskog paketa OHAZ

master's thesis

• Title (english): Seizmic hazard assessment in the area of Croatia using OHAZ software
• Author: Nikolina Matušić
• Mentor: Snježana Markušić (mentor)
• Committee member: Snježana Markušić (predsjednik povjerenstva)
• Committee member: Josip Stipčević (član povjerenstva)
• Committee member: Antun Marki (član povjerenstva)
• Committee member: Ivica Sović (član povjerenstva)
• Committee member: Zoran Pasarić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geophysics); Zagreb
• Defense date and country: 2018-10-15, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geophysics; Seismology and Physics of the Earth's Interior

Abstract

U ovom radu provedena je procjena seizmičkog hazarda na širem prostoru Hrvatske. Proračunu se pristupilo probabilističkom metodom i korištenjem programskog paketa za proračun hazarda OHAZ. Softverom OHAZ moguće je uz dobro definirane ulazne parametre izračunati sve faze proračuna hazarda. Za potrebe proračuna preuzeti su i pripremljeni katalog glavnih potresa, seizmotektonika područja i atenuacijske relacije prikladne za istraživano područje. Procjena sadrži sve potrebne elemente proračuna hazarda: seizmičku aktivnost, godišnje stope premašivanja niza referentnih vrijednosti površinskog gibanja, te vršne akceleracije tla pri povratnim periodima od 95, 475 i 1000 godina, tj. vjerojatnosti premašivanja površinskog gibanja od 10% u razdoblju od 10, 50 i 100 godina. Dobivena prostorna raspodjela PGA odgovara raspodjeli jakih potresa (𝑀 > 4) na istraživanom području, a vrijednosti su unutar očekivanih. Rezultati PGA usporedivi su s rezultatima dobivenim u projektu BSHAP u kojem je analiziran seizmički hazard na prostoru zapadnog Balkana: područja pojačanog potresnog djelovanja se podudaraju, a vrijednosti su istog reda veličine, iako su u ovom radu nešto veće od onih dobivenih projektom BSHAP.

Abstract (english)

A probabilistic seismic hazard assessment was carried out for the territory of Croatia and parts of neighbouring countries using OHAZ software. Given well-defined input parameters, all stages of the hazard assessment can be calculated using OHAZ software. For that purpose, a catalogue of main events was specified, along with the seismotectonic setting of the area and the attenuation relationships best suited for the observed area. The analysis contains all the necessary steps of the hazard assessment: seismic activity, annual rate of exceedance for a range of reference ground motion levels and peak ground acceleration for the return periods of 95, 475 and 1000 years, i.e. the 10% probability of exceedance in 10, 50 and 100 years. The obtained spatial PGA distribution corresponds well to the distribution of strong earthquakes (𝑀 > 4) in the observed area, and the output values fall within the expected range. The results of the assessment are comparable to the PGA obtained in the BSHAP project, which analysed seismic hazard in the Western Balkan Region - the values, although somewhat higher here than in the BSHAP project, are of the same order of magnitude, and the areas of higher seismic activity match as well.

• Keywords: seizmički hazard; seizmička aktivnost; godišnja stopa premašivanja
• Keywords (english): seismic hazard; seismic activity; annual exceedance rate
• Language: croatian
• URN:NBN: urn:nbn:hr:217:071699
• Study programme: Title: Graduate university study pf Physics - Geophysics; specializations in: Seismology and Physics of the Earth's Interior, Meteorology and Physical Oceanography; Course: Seismology and Physics of the Earth's Interior; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra fizike – geofizike (magistar/magistra fizike – geofizike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-11-05 08:51:00