Abstract
The shallow medieval Jeroným Mine is located at a distance of about 25 km southeast of the Nový Kostel focal zone where the most intensive seismic activity in West Bohemia (Czech Republic) has been documented. Permanent seismological monitoring has been carried out since 2004 in this mine. During the 2011 and 2014 seismic swarms, more than 1000 triggered records comprising almost 1500 earthquakes were recorded at the permanent station in the mine. Three short-term seismological experiments were accomplished during these swarms. Several temporary seismic stations were simultaneously placed in different parts of underground spaces which enabled comparison of vibration effect caused by near earthquakes in different parts of the mine. Although the depth of the lowest parts of mine is only about 60 m, a vibration effect generated by earthquakes from the Nový Kostel focal zone is not the same for the whole underground complex.
Highlights
The Jeroným (Jerome) Mine is located near ýistá in the Sokolov Region, West Bohemia
Vibration effect was measured in different parts of shallow medieval Jeroným Mine, which is located in West Bohemia, Czech Republic
During the 2011 and 2014 seismic swarms in the Nový Kostel focal zone, more than 250 earthquakes with local magnitude ML 3.6 were recorded in the underground spaces during performed shortterm seismic measurements
Summary
The Jeroným (Jerome) Mine is located near ýistá in the Sokolov Region, West Bohemia. This medieval mine was declared the National Cultural Heritage Site in 2008 and it represents a part of the European Mining Heritage. Based on the measured data and information about local magnitude of recorded earthquakes (according to database of WEBNET network; IG CAS 1991), maximum space component of vibration velocity in the mine of 13 mmsí was extrapolated for an expected earthquake with local magnitude ML 5.0 As it is mentioned in the performed studies, maximum vibration velocity expected in the Jeroným Mine should not reach limit values for the first damage underground, as stated in the literature (e.g., Dowding and Rozen 1978). Based on the remarks resulting from the measurement in 2011, experimental measurement was performed during 2014 seismic swarm with temporary seismic station (signed ST6) located in the highest accessible part of K1 chamber near collapsed roof and cracked pillar
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