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Tectonics (left) and geomorphology (right) of the 2012 Pernik earthquake region. On tectonic map: Pg – Paleogene; Ng-Q – Neogene-Quaternary. Geomorphology presented by shaded relief map from SRTM 3 arc second data (USGS) and colour overlap of Multi-resolutional river bottom index (Gallant and Dowling 2003) indicative for present-day depocenters. Blue colours show increased aggradation, and reddish colours outline area of increased degradation. Geomorphic index calculated by SAGA software. Epicenter and focal mechanism from USGS (2012). 

Tectonics (left) and geomorphology (right) of the 2012 Pernik earthquake region. On tectonic map: Pg – Paleogene; Ng-Q – Neogene-Quaternary. Geomorphology presented by shaded relief map from SRTM 3 arc second data (USGS) and colour overlap of Multi-resolutional river bottom index (Gallant and Dowling 2003) indicative for present-day depocenters. Blue colours show increased aggradation, and reddish colours outline area of increased degradation. Geomorphic index calculated by SAGA software. Epicenter and focal mechanism from USGS (2012). 

Source publication
Conference Paper
Full-text available
The earthquake of M W 5.6 on 22 May 2012 in SW Bulgaria is a shallow normal-faulting earthquake. Coseismic ground cracks along a fault-line scarp, focal mechanisms and hypocentre allocations suppose that the seismogenic source is a normal fault segment from the NW boundary fault of Pernik basin, named Meshtitsa fault, which has not been considered...

Contexts in source publication

Context 1
... Pernik basin is a continental basin filled with conglomerate, sandstone, shale, and coal of prevailing Oligocene age positioned in the Srednogorie tectonic zone (Fig. 1). The Srednogorie is a regional Upper Cretaceous- Tertiary zone that hosts main extensional loci of the northernmost area of Northern Aegean extensional ...
Context 2
... Tertiary strata of Pernik basin form a syncline. Many small-scale normal faults in the basin (Kamenov 1964) evidence post-sedimentary extensional tectonics. Bounding faults are arranged in a segmented pattern with changing strikes (Fig. 1). Reverse, normal and strike-slip kinematics have been attributed to the faults ( Bončev et al. 1960;Kamenov 1964;Kostadinov 1971). Traditional concept that the basin is an autochthonous syncline compressed between two reverse faults ( Bončev et al. 1960) is not likely because it requires fault plane rotation along the vertical ...
Context 3
... Pernik basin and the Graovo basin shape a hilly intramountain depression consisted of three Late Pleistocene -Holocene depocenters ( Fig. 1). Depocenters are relatively flatter and lower-relief areas well outlined by means of multi-resolutional river bottom index ( Gallant and Dowling 2003). Recent aggradation is confined to channel and flood alluvium, rare alluvial fans, and landslides along the mountain foothills. Limited sediment indicates prevalent erosion, which tends ...
Context 4
... refer the north-western section of the NE bounding fault to Meshtitsa fault. The fault generally separates an Upper Cretaceous volcano- sedimentary sequence in the footwall from Oligocene terrigenous sediment in the hanging wall. The middle segment from the NE bounding fault system that shifts strike almost 90° is known as Lyulin reverse fault (Fig. 1). The Lyulin reverse fault has recently been extended toward NW along the Meshtitsa fault segment ( Marinova et al. 2010) in contradiction with field observations on normal fault at that place (Kamenov 1964). The 2012 earthquake hypocenter is positioned on a normal fault plane that intersects terrain along the Meshtitsa fault trace. ...

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