Creating and analyzing the seismomectonic model of Hungary

1. New neotectonic map of Hungary

2. Earthquake focal mechanism in Hungary

New neotectonic map of Hungary

One of the main goals of the project in 2019 (1ts milestone) was the construction of the new neotectonic map of Hungary completed by the colleagues of Geomega Ltd. The new map is based on the integrated interpretation of the available country-wide 2D-3D seismic dataset, as well as on the critical (re-)evaluation of the results of many published/unpublished neotectonic studies. The new 1:500 000 scale map introduces in a detailed way all important deformation structures (faults and folds) of various origin (tectonic and atectonic) formed during the neotectonic evolutionary phase (<6–8 Ma) of the Pannonian basin. The new map — Wórum, G., Koroknai, B., Koroknai, Zs., Fekete-Németh, V., Kovács, G., Tóth, T., 2020. Young geological deformations in Hungary. Geomega Ltd., Budapest. DOI: 10.17632/dnjt9cmj87.1 — is available for all interested researchers without any limitations using the DOI:
https://doi.org/10.17632/dnjt9cmj87.1

The background and methods of the mapping, as well as its main results are summarized in a new scientific paper published in the journal Earth Science Review (ESR) in November 2020. The paper — Koroknai, B., Wórum, G., Tóth, T., Koroknai, Zs., Fekete-Németh, V., Kovács, G., 2020. Geological deformations in the Pannonian Basin during the neotectonic phase: New insights from the latest regional mapping in Hungary. Earth-Science Reviews 211, 103411; https://doi.org/10.1016/j.earscirev.2020.103411 — is available (pdf) to any interested researcher for request from the authors.
Both the new map and the related paper are dedicated to the memory of our Colleague, late Prof. Dr. Ferenc Horváth, who initiated the project and the new mapping, and who played an outstanding role in the neotectonic research of Hungary and the surrounding Pannonian basin.

Earthquake focal mechanisms in Hungary

Knowledge of the crustal stress field is essential for understanding tectonics and earthquake generation. One approach for estimating the crustal stress field is based on the focal mechanisms of earthquakes. The focal mechanisms, which indicate the fault plane and slip directions, can be used to infer the structure and kinematics of faults at depth and to constrain the crustal stress field in which the earthquakes occur. One of the main goals of the present project is to construct a reliable focal mechanism database for Hungary and the Pannonian basin.
We use probabilistic non-linear waveform inversion methods to retrieve both the centroids and the moment tensors of local and near-regional earthquakes. The uncertainties of the resulting source parameters are estimated as well. The retrieved moment tensor solutions are robust and of sufficient quality to draw  conclusions on the neotectonic features of the epicentral regions.
You can download our regularly updated focal mechanism catalog in PDF form.