Crustal Structure Beneath Carpathian-panonian Region by Ambient Noise Tomography and Teleseismic P Wave Coda Autocorrelation
Description:
The Carpathian-Pannonian region (CPR) in Central Europe has significant seismic activity, highlighting the need for detailed crustal studies. Although the region has been the object of many international research efforts, the crustal structure beneath CPR remains poorly known. Previously, there were few studies that provided the crustal structure beneath this region, but all these studies were unable to provide high resolution Moho map because of the sparse coverage of seismic station. Now, dense coverage of seismic stations is available in this region and hence the crustal structure beneath this region has been improved. Although highly resolved 3-D S -wave velocity structure of the crust and crustal thickness is poorly known in this region. This study presents a new 3-D S-wave velocity structure of the crust and high-resolution Moho map by ambient noise tomography and teleseismic P wave coda autocorrelation. In this study, we used 235 broadband stations from seven different networks. The distribution of these stations provides the unprecedented dense ray-coverage that enables us to achieve the best lateral resolution in our study area so far. The results from P wave coda autocorrelation indicate a shallow Moho beneath the Pannonian, Vienna, and Danube basins, with depths between 20 and 30 km, while the deepest Moho is observed beneath the Southern Carpathians, Apuseni Mountains, and Southeast Carpathians, where it reaches depths of 45 to 55 km. The shallower Moho beneath the basins indicates crustal thinning, while thicker Moho in neighboring mountain belts indicates orogenic thickening. The ambient noise tomography further refines the velocity structure beneath each station, enabling even more precise Moho depth determinations, which are ongoing.
Session: Earth’s Structure from the Crust to the Core [Poster]
Type: Poster
Date: 4/16/2025
Presentation Time: 08:00 AM (local time)
Presenting Author: Hari Ram
Student Presenter: No
Invited Presentation:
Poster Number: 109
Authors
Hari Ram Thapa Presenting Author Corresponding Author hthapa@nccu.edu North Carolina Central University |
Gordana Vlahovic gvlahovic@nccu.edu North Carolina Central University |
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Crustal Structure Beneath Carpathian-panonian Region by Ambient Noise Tomography and Teleseismic P Wave Coda Autocorrelation
Category
Earth’s Structure from the Crust to the Core