The central part of the Pannonian Basin is characterised by low to medium seismicity.
North central Hungary is one of the most dangerous areas of the country in terms of
earthquakes, which also includes the area of the Mór Graben where some of the largest
earthquakes occurred in Hungary’s history. Recent activity has been observed in the
Mór Graben. It has been established that earthquake swarms occur quite frequently
in the graben. To further study these events, we deployed a temporary seismic network
that operated for 20 months. Using the temporary network stations as well as permanent
stations from the Kövesligethy Radó Seismological Observatory and the GeoRisk Ltd.
networks we registered 102 events of small magnitudes. In this paper, we demonstrate
and compare three different event detection methods based on the registered waveforms
by the permanent and temporary stations to find the optimal one to collect a complete
swarm list in the Mór Graben. After the hierarchical cluster analysis, we relocated
the hypocentres using a multiple-event algorithm. Our results demonstrate that the
most successful detector in this case is the “Subspace detector.” We managed to create
a complete list of the events. Our results indicate that the Mór Graben is still seismically
active.
