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The Doupov volcanic complex forms the Doupovské hory Mts. in the western part of the Bohemian Massif, Czech Republic. Its creation in the Tertiary was closely related to the opening of the nearby Ohre Rift (Eger Rift). The diameter of the complex is about 30 km. Based on borehole and xenoliths data, relatively small thickness of the volcanic rocks, probably less than about 1 km, is indicated. On the contrary, previous geophysical measurements indicate much thicker surface volcanic structure. For several reasons, detailed geological and geophysical studies of this interesting region are still lacking. The situation improves as seismic measurements were performed there in June 2008. Refraction profiles were deployed between four blasts in quarries, which are situated at the edge of the volcanic complex. Preliminary interpretation of observed data includes P-wave seismic tomography giving the 3D velocity distribution down to a depth of three kilometres and, in particular, resolving the form of the bottom boundary of volcanic rocks. The first results suggest
that beneath the whole volcanic complex the basaltic rocks form flat approximately 1.5 kilometre thick body in the depth of about 2 kilometres.
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