Index Geophysics

hrv Geodetsko-geološka istraživanja na širem zagrebačkom području oslonjena na Geodinamičku mrežu Grada Zagreba

eng Geodetic-Geologic Research on Wider Zagreb Area based on Geodynamic Network of City of Zagreb

hrv Geodinamička GPS mreža Grada Zagreba predstavlja najduža i najintenzivnija geodinamička istraživanja na području Republike Hrvatske. Od uspostave mreže 1997. godine provedeno je devet serija preciznih GPS mjerenja na specijalno stabiliziranim točkama Geodinamičke mreže Grada Zagreba u svrhu istraživanja pomaka odnosno tektonskih pokreta i srodnih seizmičkih aktivnosti na području istraživanja. Obrada podataka mjerenja izvedena je sa znanstvenim softverom GAMIT/GLOBK, razvijenim na MIT-u. Iz svih provedenih serija GPS mjerenja od 1997. do 2009. godine stvoren je originalni geodetski model tektonskih pomaka. U sklopu predmetnih istraživanja proveden je i cijeli niz geoloških mjerenja te je izvedena znanstvena usporedba dvaju modela realiziranih neovisnim metodama i određivanje koeficijenta njihove korelacije. Nakon sustavnih interdisciplinarnih analiza geodetskih i geoloških podataka, kao rezultat je određen jedinstveni interdisciplinarni model gibanja pripovršinskih slojeva Zemljine kore na tom području. Rezultati toga znanstvenog istraživanja koristit će se za opisivanje zona potencijalnih opasnosti od potresa i tektonski izazvanih klizišta. U radu je posebna pozornost posvećena kampanji mjerenja izvedenoj 2009. godine, jer njezini rezultati pokazuju povećanu tektonsku aktivnost u razdoblju 2008–2009. Naime, analizom rezultata utvrđeno je da povećanje tektonske aktivnosti i osobito smjerovi pomaka pojedinih točaka određenih geodetskim mjerenjima upućuju na izravne utjecaje regionalnih tektonskih pokreta. Ustanovljeni pomaci u obuhvaćenom području upućuju na početnu fazu veće tektonske aktivnosti u prostoru paralelnom Zagrebačkom rasjedu te na mogućnost da veća aktivnost tog prostora tek slijedi.

eng The Geodynamic GPS-Network of the City of Zagreb represents the longest and the most intensive research effort in the field of geodynamics in Croatia. Since the establishment of the Network in 1997, nine series of precise GPS measurements have been conducted on specially stabilized points of Geodynamical Network of City of Zagreb with purpose of investigation of tectonic movements and related seismic activity related to the research. Processing of observation data was done with scientific software GAMIT/GLOBK, developed by MIT. Using results from all series of GPS measurements conducted since 1997 till 2009 geodetic model of tectonic movements has been created. In the area of interest, independent geological investigations have been conducted through even longer period which resulted in geological model of tectonic movements. The correlation coefficient between geodetic and geologic model has been calculated. It shows a high degree of correlation thus giving credibility to both methods of research. Systematic analysis has been conducted over geodetic and geologic results giving a unique interdisciplinary model of crust movements over wider Zagreb area as a result. This interdisciplinary interpretation of obtained geodetic movements leads to a new scientific insight about geodynamics of the City of Zagreb area. The results of this scientific research will be used to delineate zones of potential earthquake hazard or tectonically caused landslides. The paper pays particular attention to the GPS series of measurements conducted in 2009, because its results show the increased tectonic activity in the period 2008-2009. The analysis of results showed that the increase in tectonic activity and in particular, direction of movements of certain points indicate the direct influence of regional tectonic movements. Determined velocities of the points in the research area point to the initial phase of increased tectonic activity in the area parallel to the Zagreb fault and to the possibility that increased tectonic activity of this area is yet to come.

Pribičević, Boško

Đapo, Almin

Medak, Damir

hrv GPS; geodinamika; korelacija; Geodinamička mreža Grada Zagreba

eng GPS; geodynamics; correlation; Geodynamic Network of City of Zagreb

Croatian geodetic society

2011

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info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion

application/pdf

https://hrcak.srce.hr/70851

hrv https://hrcak.srce.hr/file/105453

Geodetski list

ISSN 0016-710X (Print)

ISSN 1849-0611 (Online)

Volume 65 (88)

Issue 1

hrv

info:eu-repo/semantics/openAccess

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