SEISMICITY AND SEISMOLOGICAL OBSERVATIONS OF EXCURSION GUIDE BALTIC SEA REGION AND ADJACENT TERRITORIES International Workshop SS S EEEIIISSSMMMIIICCCIIITTTYYY AND SEISMOLOGICAL OBSERVATIONS OF THE BALTIC SEA REGION AND ADJACENT TERRITORIES September 10–12, 2007 Vilnius, Lithuania VOLUME OF ABSTRACTS VVOOLLUUMMEE OOFF AABBSSTTRRAACCTTSS Vilnius, 2007 AND SEISMOLOGICAL OBSERVATIONS OF THE BALTIC SEA REGION SEISMICITY VVVOOOLLLUUUMMMEEE OOOFFF AAABBBSSSTTTRRRAAACCCTTTSSS SEISMICITY AND ADJACENT TERRITORIES September 10–12, 2007, Lithuania International Workshop “Seismicity and seismological observations of the Baltic Sea region and adjacent territories”, September 10–12, 2007, Vilnius, Lithuania: Volume of abstracts / Compiled by. J. Lazauskienė, J. Satkūnas; International Union of Geological Sciences (IUGS), International Borders – Geoenvironmental Concerns (IBC), Lithuanian Geological Survey. – Vilnius: LGT, 2007. – 80 p.: iliustr. Workshop is held under auspice of IUGS–GEM working group – International Borders – Geoenvironmental Concerns (IBC) Organising Committee Chairman: Dr. Jonas Satkūnas, Lithuanian Geological Survey Secretary: Dr. Jurga Lazauskienė, Lithuanian Geological Survey Members: Dr. Jolanta Čyžienė, Lithuanian Geological Survey M. Sc. Andrius Pačėsa, Lithuanian Geological Survey Advisory board Valērijs Ņikuļins, Latvian Environmental, Geological and Meteorological Agency, Riga, Latvia Prof. Dr. Habil. Saulius Šliaupa, Vilnius University, Vilnius, Lithuania Structure and aims of the workshop The workshop is devoted to the seismicity and seismological observations of the Baltic Sea region and adjacent territories: historical and present situation, installation of new seismic stations, processing and analysis of seismic data, seismic hazard assessment and risk mitigation. The major aim of the workshop is to disseminate and discuss the major seismicity related issues over the whole Baltic Sea region and the wide range of issues related to the low seismicity regions, focusing on networking, monitoring, assessment of seismicity, data management and scientific co‐operation. Compiled by: J. Lazauskienė, J. Satkūnas Layout: R. Norvaišienė Cover design: I. Virbickienė Circulation: 50 copies © Lietuvos geologijos tarnyba, 2007 222 AND SEISMOLOGICAL OBSERVATIONS OF THE BALTIC SEA REGION SEISMICITY VVVOOOLLLUUUMMMEEE OOOFFF AAABBBSSSTTTRRRAAACCCTTTSSS SEISMICITY AND ADJACENT TERRITORIES September 10–12, 2007, Lithuania CONTENT DISCREPANCY IN LOCATION OF MACROSEISMICALLY AND INSTRUMENTALLY DERIVED EPICENTERS OF KALININGRAD, SEPTEMBER 21, 2004, EARTHQUAKE – FACTUAL DATA AND POSSIBLE EXPLANATIONS........................................................................................ 5 Aleshin A. S., Aptikaev F. F., Nikonov A. A., Pogrebchenko V. V. SEISMOLOGICAL OBSERVATIONS IN ESTONIA ................................................................ 8 All T. MODERN MICROSEISMIC OBSERVATIONS IN KALININGRAD REGION (TRACKING CONSEQUENCES OF 2004 EARTHQUAK) ...................................................................... 10 Ambrosimov A.K., Kovachev S.A., Sivkov V.V. SEISMICITY AND SEISMIC OBSERVATIONS IN BELARUS ............................................... 11 Aronov A.G., Aronova T.I., Kulich O.N. KALININGRAD EARTHQUAKE SEPTEMBER 21 2004 – TECTONIC MODEL...................... 14 Assinovskaya B., Ovsov M., Zhamoida V., Shcherbakova N. THE NEW SWEDISH NATIONAL SEISMOLOGICAL NETWORK ......................................... 15 Bödvarsson R. NEW PERSPECTIVES OF MONITORING OF THE SEISMICITY OF GULF OF GDANSK AND ADJACENT AREAS......................................................................................................... 16 Dębski W., Wiejacz P., Suchcicki J., Wiszniowski J. SOURCE PARAMETERS OF KALININGRAD EARTHQUAKES ............................................ 17 Domański B., Dębski W. RECONSTRUCTION OF STRESS FIELDS IN ADJACENT REGIONS SEPARATED BY SEISMICALLY-ACTIVE FAULTS ...................................................................................... 18 Galybin A. N., Mukhamediev Sh. A. CORRELATIONS OF MAGNITUDE AND FELT-AREA FOR EARTHQUAKES IN THE FENNOSCANDIAN SHIELD/EAST EUROPEAN PLATFORM ............................................... 22 Gregersen S., Husebye E., Mantyniemi P. NORWEGIAN NATIONAL SEISMIC NETWORK RECORDING EVENTS IN THE BALTIC COUNTRIES.................................................................................................................. 24 Havskov J. LITHUANIAN SEISMIC NETWORK – CURRENT STATUS AND PERSPECTIVES ................. 28 Lazauskienė J. SELENA; A SOFTWARE FOR NEAR REAL-TIME DAMAGE ESTIMATION AND DAMAGE SCENARIOS .................................................................................................................. 31 Lindholm, C. D., Molina S., Bungum H., Oye V. A 2-D SEISMIC SIGNAL DETECTOR FOR STAND ALONE 3-COMPONENT STATIONS ........ 38 Matveeva T., Fedorenko Yu.V., Husebye E.S. THE KARELIAN REGIONAL SEISMIC NETWORK – THE COSSACK RANGER II SEISMOGRAPH 43 Matveeva T., Fedorenko YU. V., Husebye E. S. AUTOMATIC P-CODA PHASES IDENTIFICATION USING BAYESIAN APPROACH............... 47 Matveeva T., Fedorenko Yu. V., Fedorenko M., Husebye E. S. SEISMIC RESISTANCE OF SYSTEMS AND ELEMENTS OF EXISTING IGNALINA NPP ON THE BASIS OF PERFORMED INVESTIGATIONS ..................................................................... 51 Mereznikov A. 333 AND SEISMOLOGICAL OBSERVATIONS OF THE BALTIC SEA REGION SEISMICITY VVVOOOLLLUUUMMMEEE OOOFFF AAABBBSSSTTTRRRAAACCCTTTSSS SEISMICITY AND ADJACENT TERRITORIES September 10–12, 2007, Lithuania SEISMIC HAZARD OF TERRITORY OF LOCATION OF THE IGNALINA NUCLEAR POWER PLANT BY RESULTS OF COMPLEX RESEARCHES 1987–1988 OF THE LAST CENTURY... 53 Mindel I.G., Trifonov B.A. APPROACH TO PARAMETRIZATION OF TECTONIC EARTHQUAKES WITHIN THE KALININGRAD DISTRICT, RUSSIA, BY MACROSEISMIC DATA ........................................ 57 Nikonov A. A. KALININGRAD, SEPTEMBER 21, 2004, EARTHQUAKE IN THE EASTERN BALTIC AREA – BASIC MACROSEISMIC MAPS FOR THREE MAIN SHOCKS ............................................. 60 Nikonov A.A., Pačėsa A., Aptikaev F.F., Nikulin V.G., Puura V., Aronov A.G. REGIONAL FEATURES OF SEISMOTECTONICS AND DEFORMATION OF EARTH CRUST OF BALTIC REGION............................................................................................................ 63 Nikulin V. G. SEISMOLOGICAL OBSERVATIONS IN LITHUANIA........................................................... 66 Pačėsa A. APPLICATION OF THE PROBABILISTIC APPROACH IN ASSESSMENT OF THE SEISMIC HAZARD OF THE BALTIC REGION ................................................................................. 69 Pačėsa A., Šliaupa S. INSTRUMENTATION OF THE SEISMIC ALARM AND MONITORING SYSTEMS OF IGNALINA NUCLEAR POWER PLANT ............................................................................................. 71 Razinkov O., Epp M., Kündig C., Davidiuk O., Narbuntas J. SEISMIC MONITORING OF AN UNDERGROUND NUCLEAR WASTE REPOSITORY AT OLKILUOTO, FINLAND .................................................................................................. 74 Saari J. THE ROUTINE MICROEARTHQUAKE ANALYSIS PACKAGE IMPLEMENTED IN ICELAND (IMO) SND SWEDEN (SNSN, UU)................................................................................... 76 Slunga R. REASSESSMENT OF THE DESIGN BASIS EARTHQUAKE FOR IGNALINA NPP, NE LITHUANIA 77 Šliaupa S., Kačianauskas R., Markauskas D., Dundulis G. NORWEGIAN NATIONAL SEISMIC NETWORK REAL TIME MONITORING......................... 79 Utheim T., Havskov J. THE SEISMOLOGICAL NETWORK IN DENMARK AND IN GREENLAND, EARTHQUAKE MONITORING AND APPLIED RESEARCH ....................................................................... 80 Voss P. 444 AND SEISMOLOGICAL OBSERVATIONS OF THE BALTIC SEA REGION SEISMICITY VVVOOOLLLUUUMMMEEE OOOFFF AAABBBSSSTTTRRRAAACCCTTTSSS SEISMICITY AND ADJACENT TERRITORIES September 10–12, 2007, Lithuania DDDIIISSSCCCRRREEEPPPAAANNNCCCYYY IIINNN LLLOOOCCCAAATTTIIIOOONNN OOOFFF MMMAAACCCRRROOOSSSEEIIISSSMMMIIICCCAAALLLLLLYYY AAANNNDDD IIINNNSSSTTTRRRUUUMMMEEENNNTTTAAALLLLLLYYY DDDEEERRRIIIVVVEEEDDD EEEPPPIIICCCEEENNNTTTEEERRRSSS OOOFFF KKKAAALLLIIINNNIIINNNGGGRRRAAADDD,,, SSSEEEPPPTTTEEEMMMBBBEEERRR 222111,,, 222000000444,,, EEEAAARRRTTTHHHQQQUUUAAAKKKEEE ––– FFFAAACCCTTUUUAAALLL DDDAAATTTAAA AAANNNDDD PPPOOOSSSSSSIIIBBBLLLEEE EEEXXXPPPLLLAAANNNAAATTTIIIOOONNNSSS Aleshin A. S., Aptikaev F. F., Nikonov A. A., Pogrebchenko V. V. IFZ RAS, Bol. Gruzinskaya, 10, Moscow, Russia; [email protected] A great number of articles [1–4 and others] are dedicated to examination of peculiarities of Kaliningrad earthquakes on September 21, 2004. At the same time some problems required more clarity. The most important of them to our opinion is discrepancy in focal locations by macroseismic and instrumental data. This problem is important from the point of view of connection of tectonic structures with the focal zones of recent earthquake and also the determination of potential earthquakes zones. Examination of these discrepancies and their possible causes are the subject of this report. Macroseismic evaluations Macroseismic evaluations of focal zones of each of main shocks of Kaliningrad earthquakes 21.09.2004 may be made by the following collection maps analysis: – maps of intensity and isoseismals; – maps of sensitive oscillations directions; maps of directions and power sound; – maps of inclines, objects and constructions fall directions. Conclusion about three main shocks epicenters locations is based on the following facts [1]. Maximal