TY - JOUR AU - Békési, Eszter AU - Lenkey, László AU - Limberger, J AU - Porkoláb, Kristóf AU - Balázs, Attila AU - Bonté, D AU - Vrijlandt, M AU - Horváth, Ferenc AU - Cloetingh, S AU - van Wees, JD TI - Subsurface temperature model of the Hungarian part of the Pannonian Basin JF - GLOBAL AND PLANETARY CHANGE J2 - GLOBAL PLANET CHANGE VL - 171 PY - 2018 SP - 48 EP - 64 PG - 17 SN - 0921-8181 DO - 10.1016/j.gloplacha.2017.09.020 UR - https://m2.mtmt.hu/api/publication/26902707 ID - 26902707 AB - Hungary is one of the most suitable countries in Europe for geothermal development, as a result of large amounts of Miocene extension and associated thermal attenuation of the lithosphere. For geothermal exploration, it is crucial to have an insight into the subsurface temperature distribution. A new thermal model of Hungary is presented extending from the surface down to the lithosphere-asthenosphere boundary (LAB) based on a new stochastic thermal modeling workflow. The model solves the heat equation in steady-state, assuming conduction as the main heat transfer mechanism. At the top and the base, we adopt a constant surface temperature and basal heat flow condition. For the calibration of the model, temperature measurements were collected from the Geothermal Database of Hungary. The model is built up in a layered structure, where each layer has its own thermal properties. The prior thermal properties and basal condition of the model are updated through the ensemble smoother with multiple data assimilation technique. The prior model shows a misfit with the observed temperatures, which is explained fundamentally by transient thermal effects and non-conductive heat transfer. Other misfits can be attributed to a-priori assumptions on thermal properties, boundary conditions, and uncertainty in the model geometry. The updated models considerably improve the prior model, showing a better fit with measured records. The updated models are capable to reproduce the thermal effect of lithospheric extension and the sedimentary infill of the Pannonian Basin. Results indicate that the hottest areas below 3 km are linked to the basement highs surrounded by deep subbasins of the Great Hungarian Plain. Our models provide an indication on the potential sites for future EGS in Hungary and can serve as an input for geothermal resource assessment. LA - English DB - MTMT ER - TY - JOUR AU - Bondár, István AU - Mónus, Péter AU - Czanik, Csenge AU - Marótiné Kiszely, Márta AU - Gráczer, Zoltán AU - Wéber, Zoltán AU - AlpArray, Working Group TI - Relocation of Seismicity in the Pannonian Basin Using a Global 3D Velocity Model JF - SEISMOLOGICAL RESEARCH LETTERS J2 - SEISMOL RES LETT VL - 89 PY - 2018 IS - 6 SP - 2284 EP - 2293 PG - 10 SN - 0895-0695 DO - 10.1785/0220180143 UR - https://m2.mtmt.hu/api/publication/30339209 ID - 30339209 N1 - Összes idézések száma a WoS-ban: 0 Funding Agency and Grant Number: Hungarian National Research, Development and Innovation Fund [K124241] Funding text: The authors are grateful for the comments from Anthony Lomax, an anonymous reviewer, and Editor-in-Chief Zhigang Peng. Their suggestions helped to improve the article. This work was supported by the Hungarian National Research, Development and Innovation Fund (Number K124241). Cited By :6 Export Date: 16 February 2021 Funding details: K124241 Funding text 1: The authors are grateful for the comments from Anthony Lomax, an anonymous reviewer, and Editor-in-Chief Zhigang Peng. Their suggestions helped to improve the article. This work was supported by the Hungarian National Research, Development and Innovation Fund (Number K124241). AB - The Pannonian basin together with the surrounding orogenic belts of Alps, Carpathians, and Dinarides represents a geologically complex region that exhibits significant lateral variation in lithospheric structure. Accurate earthquake locations are a prerequisite for better understanding of neotectonic activity driven by the movement of the Adriatic microplate and to facilitate seismic hazard studies. We relocate the seismicity recorded in the digital instrumental period between 1996 and 2016 using the state-of-the-art iLoc location algorithm. The relative abundance of ground-truth (GT) events allows us to evaluate the performance of the 1D local velocity models used in the past and the global 3D upper-mantle and crustal regional seismic travel time (RSTT) velocity models. We demonstrate that the 3D velocity model captures the major 3D velocity heterogeneities and provides an improved view of the seismicity in the region. LA - English DB - MTMT ER - TY - BOOK AU - Budai, Tamás AU - Fodor, László AU - Sztanó, Orsolya AU - Kercsmár, Zsolt AU - Császár, Géza AU - Csillag, Gábor AU - Gál, Nóra Edit AU - Kele, Sándor AU - Marótiné Kiszely, Márta AU - Selmeczi, Ildikó AU - Babinszki, Edit AU - Thamóné Bozsó, Edit AU - Lantos, Zoltán TI - A Gerecse hegység földtana: magyarázó a Gerecse hegység tájegységi földtani térképéhez (1:50000) = Geology of the Gerecse Mountains: Explanatory book to the geological map of the Gerecse Mountains (1:50000) T3 - Magyarország tájegységi térképsorozata: Regional map series of Hungary ET - 0 PB - Magyar Bányászati és Földtani Szolgálat CY - Budapest PY - 2018 SP - 491 SN - 9789636713126 UR - https://m2.mtmt.hu/api/publication/3323758 ID - 3323758 LA - English DB - MTMT ER - TY - JOUR AU - Gráczer, Zoltán AU - Szanyi, Gyöngyvér AU - Bondár, István AU - Czanik, Csenge AU - Czifra, Tibor AU - Győri, Erzsébet AU - Hetényi, György AU - Kovács, István János AU - Molinari, I AU - Süle, Bálint AU - Szűcs, Eszter AU - Wesztergom, Viktor AU - Wéber, Zoltán TI - AlpArray in Hungary: temporary and permanent seismological networks in the transition zone between the Eastern Alps and the Pannonian basin JF - ACTA GEODAETICA ET GEOPHYSICA J2 - ACTA GEOD GEOPHYS VL - 53 PY - 2018 IS - 2 SP - 221 EP - 245 PG - 25 SN - 2213-5812 DO - 10.1007/s40328-018-0213-4 UR - https://m2.mtmt.hu/api/publication/27227828 ID - 27227828 N1 - Article in Press First Online: 20 March 2018 LA - English DB - MTMT ER - TY - BOOK AU - Gráczer, Zoltán AU - Bondár, István AU - Czanik, Csenge AU - Czifra, Tibor AU - Győri, Erzsébet AU - Marótiné Kiszely, Márta AU - Mónus, Péter AU - Süle, Bálint AU - Szanyi, Gyöngyvér AU - Tóth, László AU - Varga, Péter AU - Wesztergom, Viktor AU - Wéber, Zoltán TI - Hungarian National Seismological Bulletin 2017 ET - 0 PB - MTA CSFK GGI Kövesligethy Radó Szeizmológiai Obszervatórium CY - Budapest PY - 2018 SP - 405 UR - https://m2.mtmt.hu/api/publication/30366083 ID - 30366083 LA - English DB - MTMT ER - TY - JOUR AU - Gribovszki, Katalin Eszter AU - Esterhazy, S AU - Bokelmann, G TI - Numerical modeling of stalagmite vibrations JF - PURE AND APPLIED GEOPHYSICS J2 - PURE APPL GEOPHYS VL - 175 PY - 2018 IS - 12 SP - 4501 EP - 4514 PG - 14 SN - 0033-4553 DO - 10.1007/s00024-018-1952-4 UR - https://m2.mtmt.hu/api/publication/3395768 ID - 3395768 LA - English DB - MTMT ER - TY - JOUR AU - Hetényi, György AU - Molinari, I AU - Clinton, J AU - Bokelmann, G AU - Bondár, István AU - Crawford, WC. AU - Dessa, JX AU - Doubre, C AU - Friederich, W AU - Fuchs, F AU - Giardini, D AU - Gráczer, Zoltán AU - Handy, MR. AU - Herak, M AU - Jia, Y AU - Kissling, E AU - Kopp, H AU - Korn, M AU - Margheriti, L AU - Meier, T AU - Mucciarelli, M AU - Paul, A AU - Pesaresi, D AU - Piromallo, C TI - The AlpArray Seismic Network: A Large-Scale European Experiment to Image the Alpine Orogen JF - SURVEYS IN GEOPHYSICS J2 - SURV GEOPHYS VL - 39 PY - 2018 IS - 5 SP - 1009 EP - 1033 PG - 25 SN - 0169-3298 DO - 10.1007/s10712-018-9472-4 UR - https://m2.mtmt.hu/api/publication/30339218 ID - 30339218 LA - English DB - MTMT ER - TY - JOUR AU - Kalmár, Dániel AU - Süle, Bálint AU - Bondár, István AU - the, AlpArray Working Group TI - Preliminary Moho depth determination from receiver function analysis using AlpArray stations in Hungary JF - ACTA GEODAETICA ET GEOPHYSICA J2 - ACTA GEOD GEOPHYS VL - 53 PY - 2018 IS - 2 SP - 309 EP - 321 PG - 13 SN - 2213-5812 DO - 10.1007/s40328-018-0218-z UR - https://m2.mtmt.hu/api/publication/3385272 ID - 3385272 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Fund [K124241]\n Funding text: The reported investigation was supported by the National Research, Development and Innovation Fund (No. K124241). Waveforms were used from the AlpArray temporary network (https://doi.org/10.12686/alparray/z3_2015), from the Hungarian National Seismological Network (https://doi.org/10.14470/uh028726), the Slovak National Seismological Network (https://doi.org/10.14470/fx099882) as well as the Slovenian National Seismological Network (https://doi.org/10.7914/sn/sl). We would like to thank to the authors of Generic Mapping Tools (GMT) software (Wessel and Smith 1998). The authors thank the two anonymous reviewers whose comments helped to improve the paper.\n Funding Agency and Grant Number: National Research, Development and Innovation Fund [K124241] Funding text: The reported investigation was supported by the National Research, Development and Innovation Fund (No. K124241). Waveforms were used from the AlpArray temporary network (https://doi.org/10.12686/alparray/z3_2015), from the Hungarian National Seismological Network (https://doi.org/10.14470/uh028726), the Slovak National Seismological Network (https://doi.org/10.14470/fx099882) as well as the Slovenian National Seismological Network (https://doi.org/10.7914/sn/sl). We would like to thank to the authors of Generic Mapping Tools (GMT) software (Wessel and Smith 1998). The authors thank the two anonymous reviewers whose comments helped to improve the paper. Department of Geophysics and Space Science, Institute of Geography and Earth Sciences, Eötvös Loránd University, Budapest, Hungary Kövesligethy Radó Seismological Observatory, Geodetic and Geophysical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences (MTA CSFK GGI KRSZO), Budapest, Hungary Cited By :1 Export Date: 16 February 2021 Correspondence Address: Kalmár, D.; Department of Geophysics and Space Science, Hungary; email: kalmardani222@gmail.com Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA, K124241 Funding text 1: Acknowledgements The reported investigation was supported by the National Research, Development and Innovation Fund (No. K124241). Waveforms were used from the AlpArray temporary network (https ://doi.org/10.12686/alparray/z3_2015), from the Hungarian National Seismological Network (https://doi. org/10.14470/uh028726), the Slovak National Seismological Network (https://doi.org/10.14470/fx099882) as well as the Slovenian National Seismological Network (https://doi.org/10.7914/sn/sl). We would like to thank to the authors of Generic Mapping Tools (GMT) software (Wessel and Smith 1998). The authors thank the two anonymous reviewers whose comments helped to improve the paper. AB - Receiver function analysis is applied to the western part of the Pannonian Basin, a rather complex region both geologically and geodynamically. Previous receiver function analyses in this region had to deal with much smaller station density and time span than those available to us. In the analysis we used the data of some 48 seismological stations. These include not only the permanent stations from Hungary and permanent stations from neighbouring countries (Slovakia and Slovenia), but also the temporary broadband stations that were installed within the framework of the AlpArray project. Having applied rather strict manual quality control on the calculated radial receiver functions we stacked the receiver functions. Using the H–K grid search method we determined the Moho depth and the Vp/Vs ratio beneath the seismological stations in the western part of the Pannonian Basin. The unprecedented density of the AlpArray network, combined with the permanent stations, allowed us to derive high resolution Moho and Vp/Vs maps for the West Pannonian Basin, together with uncertainty estimates. Our preliminary results agree well with previous studies and complement them with finer details on the Moho topography and crustal thickness. © 2018, Akadémiai Kiadó. LA - English DB - MTMT ER - TY - JOUR AU - Békési, Eszter AU - Süle, Bálint AU - Lenkey, László AU - Lenkey-Bogé, Á AU - Bondár, István TI - Double-difference relocation of the 29 January 2011 ML 4.5 Oroszlány earthquake and its aftershocks and its relevance to the rheology of the lithosphere and geothermal prospectivity JF - ACTA GEODAETICA ET GEOPHYSICA J2 - ACTA GEOD GEOPHYS VL - 52 PY - 2017 IS - 2 SP - 229 EP - 242 PG - 14 SN - 2213-5812 DO - 10.1007/s40328-017-0195-7 UR - https://m2.mtmt.hu/api/publication/3307414 ID - 3307414 N1 - TNO, Utrecht, Netherlands Kövesligethy Radó Seismological Observatory, Geodetic and Geophysical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences (MTA CSFK GGI KRSZO), Budapest, Hungary Department of Geophysics and Space Science, Institute of Geography and Earth Sciences, Eötvös Loránd University, Budapest, Hungary MOL, Budapest, Hungary Cited By :4 Export Date: 9 December 2022 Correspondence Address: Békési, E.; TNONetherlands; email: bekesi.eszti23@gmail.com LA - English DB - MTMT ER - TY - JOUR AU - Bozóki, Tamás AU - Herein, Mátyás AU - Galsa, Attila TI - Numerical evolution of the asymmetry in the compositionally inhomogeneous lower mantle driven by Earth’s rotation JF - ACTA GEODAETICA ET GEOPHYSICA J2 - ACTA GEOD GEOPHYS VL - 52 PY - 2017 IS - 3 SP - 331 EP - 343 PG - 13 SN - 2213-5812 DO - 10.1007/s40328-016-0172-6 UR - https://m2.mtmt.hu/api/publication/3273976 ID - 3273976 N1 - Cited By :1 Export Date: 31 October 2023 Correspondence Address: Bozóki, T.; Department of Geophysics and Space Science, Pázmány Péter sétány 1/C, Hungary; email: bozoki.tamas93@gmail.com LA - English DB - MTMT ER - TY - CONF AU - Czanik, Csenge AU - Bondár, István TI - The First Infrasound Array in Hungary T2 - CTBT: Science and Technology Conference PY - 2017 SP - 9 UR - https://m2.mtmt.hu/api/publication/3316600 ID - 3316600 LA - English DB - MTMT ER - TY - JOUR AU - Czecze, Barbara AU - Süle, Bálint AU - Bondár, István TI - A 2013. évi Heves megyei földrengéssorozat helymeghatározása többeseményes algoritmussal JF - MAGYAR GEOFIZIKA J2 - MAGYAR GEOFIZIKA VL - 58 PY - 2017 IS - 3 SP - 162 EP - 174 PG - 13 SN - 0025-0120 UR - https://m2.mtmt.hu/api/publication/3315040 ID - 3315040 N1 - Eötvös Loránd Tudományegyetem, Geofizikai és Urtudományi Tanszék, Pazmany Peter Setany 1/C, Budapest, 1117, Hungary Magyar Tudományos Akadémia, Csillagászati és Földtudományi Kutatóközpont, Geodéziai és Geofizikai Intézet, Kövesligethy Radó Szeizmológiai Obszervatórium, Meredek u. 18, Budapest, 1112, Hungary Cited By :1 Export Date: 2 January 2024 LA - Hungarian DB - MTMT ER - TY - BOOK ED - Gráczer, Zoltán AU - Bondár, István AU - Czanik, Csenge AU - Czifra, Tibor AU - Győri, Erzsébet AU - Marótiné Kiszely, Márta AU - Mónus, Péter AU - Süle, Bálint AU - Szanyi, Gyöngyvér AU - Szűcs, Eszter AU - Tóth, László AU - Varga, Péter AU - Wesztergom, Viktor AU - Wéber, Zoltán TI - Hungarian National Seismological Bulletin 2016 ET - 0 PB - MTA CSFK GGI Kövesligethy Radó Szeizmológiai Obszervatórium CY - Budapest PY - 2017 SP - 353 UR - https://m2.mtmt.hu/api/publication/3313351 ID - 3313351 LA - English DB - MTMT ER - TY - JOUR AU - Gribovszki, Katalin Eszter AU - Kovács, Károly AU - Mónus, Péter AU - Bokelmann, G AU - Konecny, P AU - Lednická, M AU - Moseley, G AU - Spötl, C AU - Edwards, RL AU - Bednárik, M AU - Brimich, L AU - Tóth, László TI - Estimating the upper limit of prehistoric peak ground acceleration using an in situ, intact and vulnerable stalagmite from Plavecká priepast cave (Detrekői-zsomboly), Little Carpathians, Slovakia—first results JF - JOURNAL OF SEISMOLOGY J2 - J SEISMOL VL - 21 PY - 2017 IS - 5 SP - 1111 EP - 1130 PG - 20 SN - 1383-4649 DO - 10.1007/s10950-017-9655-3 UR - https://m2.mtmt.hu/api/publication/3256462 ID - 3256462 AB - Earthquakes hit urban centres in Europe infrequently, but occasionally with disastrous effects. Obtaining an unbiased view of seismic hazard (and risk) is therefore very important. In principle, the best way to test probabilistic seismic hazard assessments (PSHAs) is to compare them with observations that are entirely independent of the procedure used to produce PSHA models. Arguably, the most valuable information in this context should be information on long-term hazard, namely maximum intensities (or magnitudes) occurring over time intervals that are at least as long as a seismic cycle. The new observations can provide information of maximum intensity (or magnitude) for long timescale as an input data for PSHA studies as well. Long-term information can be gained from intact stalagmites in natural caves. These formations survived all earthquakes that have occurred over thousands of years, depending on the age of the stalagmite. Their ‘survival’ requires that the horizontal ground acceleration (HGA) has never exceeded a certain critical value within that time period. Here, we present such a stalagmite-based case study from the Little Carpathians of Slovakia. A specially shaped, intact and vulnerable stalagmite in the Plavecká priepast cave was examined in 2013. This stalagmite is suitable for estimating the upper limit of horizontal peak ground acceleration generated by prehistoric earthquakes. The critical HGA values as a function of time going back into the past determined from the stalagmite that we investigated are presented. For example, at the time of Jókő event (1906), the critical HGA value cannot have been higher than 1 and 1.3 m/s2 at the time of the assumed Carnuntum event (∼340 AD), and 3000 years ago, it must have been lower than 1.7 m/s2. We claimed that the effect of Jókő earthquake (1906) on the location of the Plavecká priepast cave is consistent with the critical HGA value provided by the stalagmite we investigated. LA - English DB - MTMT ER - TY - JOUR AU - Gribovszki, Katalin Eszter AU - Kovács, Károly AU - Mónus, Péter AU - Bokelmann, Götz AU - Konecny, Pavel AU - Lednická, Marketa AU - Moseley, Gina AU - Edwards, R Lawrence AU - Spötl, Cristoph AU - Bednárik, Martin AU - Brimich, Ladislav AU - Tóth, László AU - Hegymegi, Erika AU - Kegyes-Brassai, Csaba AU - Szeidovitz, Győző TI - HOSSZÚTÁVÚ FÖLDRENGÉSVESZÉLYEZTETETTSÉG-BECSLÉS A DETREKŐI-ZSOMBOLY (KIS-KÁRPÁTOK, SZLOVÁKIA) SÉRTETLEN ÁLLÓCSEPPKÖVÉNEK VIZSGÁLATÁVAL JF - MAGYAR GEOFIZIKA J2 - MAGYAR GEOFIZIKA VL - 58 PY - 2017 IS - 2 SP - 1 EP - 16 PG - 16 SN - 0025-0120 UR - https://m2.mtmt.hu/api/publication/3266126 ID - 3266126 LA - Hungarian DB - MTMT ER - TY - BOOK AU - Gráczer, Zoltán AU - Bondár, István AU - Czanik, Csenge AU - Tibor, Czifra AU - Győri, Erzsébet AU - Marótiné Kiszely, Márta AU - Mónus, Péter AU - Süle, Bálint AU - Szanyi, Gyöngyvér AU - Szűcs, Eszter AU - Tóth, László AU - Varga, Péter AU - Wesztergom, Viktor AU - Wéber, Zoltán ED - Gráczer, Zoltán TI - Hungarian National Seismological Bulletin 2015 ET - 0 PB - MTA CSFK GGI Kövesligethy Radó Szeizmológiai Obszervatórium CY - Budapest PY - 2016 SP - 278 UR - https://m2.mtmt.hu/api/publication/3159705 ID - 3159705 LA - English DB - MTMT ER - TY - JOUR AU - Bondár, István AU - Engdahl, ER AU - Villaseñor, A AU - Harris, J AU - Storchak, D TI - ISC-GEM: Global Instrumental Earthquake Catalogue (1900–2009), II. Location and seismicity patterns JF - PHYSICS OF THE EARTH AND PLANETARY INTERIORS J2 - PHYS EARTH PLANET IN VL - 239 PY - 2015 SP - 2 EP - 13 PG - 12 SN - 0031-9201 DO - 10.1016/j.pepi.2014.06.002 UR - https://m2.mtmt.hu/api/publication/2748873 ID - 2748873 N1 - Megjegyzés-24406616 # Kötet ismeretlen Admin megjegyzés-24406616 #tbldocjournalarticle.Volume 0 Kötet ismeretlen # AB - Abstract We present the final results of a two-year project sponsored by the Global Earthquake Model (GEM) Foundation. The ISC-GEM global catalogue consists of some 19 thousand instrumentally recorded, moderate to large earthquakes, spanning 110 years of seismicity. We relocated all events in the catalogue using a two-tier approach. The EHB location methodology (Engdahl et al., 1998) was applied first to obtain improved hypocentres with special focus on the depth determination. The locations were further refined in the next step by fixing the depths to those from the EHB analysis and applying the new International Seismological Centre (ISC) location algorithm (Bondár and Storchak, 2011) that reduces location bias by accounting for correlated travel-time prediction error structure. To facilitate the relocation effort, some one million seismic P and S wave arrival-time data were added to the ISC database for the period between 1904 and 1970, either from original station bulletins in the ISC archive or by digitizing the scanned images of the International Seismological Summary (ISS) bulletin (Villaseñor and Engdahl, 2005, 2007). Although no substantial amount of new phase data were acquired for the modern period (1964–2009), the number of phases used in the location has still increased by three millions, owing to fact that both the EHB and ISC locators use most well-recorded ak135 (Kennett et al., 1995) phases in the location. We show that the relocation effort yielded substantially improved locations, especially in the first half of the 20th century; we demonstrate significant improvements in focal depth estimates in subduction zones and other seismically active regions; and we show that the ISC-GEM catalogue provides an improved view of 110 years of global seismicity of the Earth. The ISC-GEM Global Instrumental Earthquake Catalogue represents the final product of one of the ten global components in the GEM program, and is available to researchers at the ISC (www.isc.ac.uk) website. LA - English DB - MTMT ER - TY - JOUR AU - Galsa, Attila AU - Herein, Mátyás AU - Lenkey, László AU - Farkas, Márton Pál AU - Taller, G TI - Effective buoyancy ratio: A new parameter for characterizing thermo-chemical mixing in the Earth's mantle JF - SOLID EARTH J2 - SOLID EARTH VL - 6 PY - 2015 IS - 1 SP - 93 EP - 100 PG - 8 SN - 1869-9510 DO - 10.5194/se-6-93-2015 UR - https://m2.mtmt.hu/api/publication/2840183 ID - 2840183 N1 - Megjegyzés-24513726 N1 Funding Details: OTKA K-72665, OTKA, Országos Tudományos Kutatási Alapprogramok N1 Funding Details: OTKA NK100296, OTKA, Országos Tudományos Kutatási Alapprogramok LA - English DB - MTMT ER - TY - JOUR AU - Katona, Tamás János AU - Bán, Zoltán AU - Győri, Erzsébet AU - Tóth, László AU - Mahler, András TI - Safety Assessment of Nuclear Power Plants for Liquefaction Consequences JF - SCIENCE AND TECHNOLOGY OF NUCLEAR INSTALLATIONS J2 - SCI TECHNOL NUC INSTALL VL - 2015 PY - 2015 PG - 11 SN - 1687-6075 DO - 10.1155/2015/727291 UR - https://m2.mtmt.hu/api/publication/2926817 ID - 2926817 LA - English DB - MTMT ER - TY - JOUR AU - Konečný, P AU - Lednická, M AU - Souček, K AU - Staš, L AU - Kubina, L AU - Gribovszki, Katalin Eszter TI - Determination of dynamic young’s modulus of vulnerable speleothems JF - ACTA MONTANISTICA SLOVACA J2 - ACTA MONTAN SLOVACA VL - 20 PY - 2015 IS - 2 SP - 156 EP - 163 PG - 8 SN - 1335-1788 UR - https://m2.mtmt.hu/api/publication/2959105 ID - 2959105 LA - English DB - MTMT ER - TY - JOUR AU - Varga, Péter AU - Timár, Gábor AU - Marótiné Kiszely, Márta TI - Two Hundred Years Ago the Dissertatio de terrae motu Mórensi and the First Isoseismal Map Appeared JF - SEISMOLOGICAL RESEARCH LETTERS J2 - SEISMOL RES LETT VL - 86 PY - 2015 IS - 5 SP - 1432 EP - 1437 PG - 6 SN - 0895-0695 DO - 10.1785/0220150076 UR - https://m2.mtmt.hu/api/publication/2922701 ID - 2922701 N1 - Admin megjegyzés-25238993 tblcategory: (Category) ('JOUR\n\nReview') #Jelleg LA - English DB - MTMT ER - TY - BOOK ED - Gráczer, Zoltán AU - Bondár, István AU - Czanik, Csenge AU - Czifra, Tibor AU - Győri, Erzsébet AU - Marótiné Kiszely, Márta AU - Mónus, Péter AU - Süle, Bálint AU - Szanyi, Gyöngyvér AU - Tóth, László AU - Varga, Péter AU - Wesztergom, Viktor AU - Wéber, Zoltán ED - Gráczer, Z TI - Hungarian National Seismological Bulletin 2014 ET - 0 PB - MTA CSFK GGI Kövesligethy Radó Szeizmológiai Obszervatórium CY - Budapest PY - 2015 SP - 563 UR - https://m2.mtmt.hu/api/publication/2995522 ID - 2995522 LA - English DB - MTMT ER - TY - JOUR AU - Bondár, István AU - Storchak, D TI - Improved location procedures at the International Seismological Centre JF - GEOPHYSICAL JOURNAL INTERNATIONAL J2 - GEOPHYS J INT VL - 186 PY - 2011 IS - 3 SP - 1220 EP - 1244 PG - 25 SN - 0956-540X DO - 10.1111/j.1365-246X.2011.05107.x UR - https://m2.mtmt.hu/api/publication/2747866 ID - 2747866 AB - The International Seismological Centre (ISC) is a non-governmental, non-profit organization with the primary mission of producing the definitive account of the Earth's seismicity. The ISC Bulletin covers some 50 yr (1960-2011) of seismicity. The recent years have seen a dramatic increase both in the number of reported events and especially in the number of reported phases, owing to the ever-increasing number of stations worldwide. Similar ray paths will produce correlated traveltime prediction errors due to unmodelled heterogeneities in the Earth, resulting in underestimated location uncertainties, and for unfavourable network geometries, location bias. Hence, the denser and more unbalanced the global seismic station coverage becomes, the less defensible is the assumption (that is the observations are independent), which is made by most location algorithms. To address this challenge we have developed a new location algorithm for the ISC that accounts for correlated error structure, and uses all IASPEI standard phases with a valid ak135 traveltime prediction to obtain more accurate event locations. In this paper we describe the new ISC locator, and present validation tests by relocating the ground truth events in the IASPEI Reference Event List, as well as by relocating the entire ISC Bulletin. We show that the new ISC location algorithm provides small, but consistent location improvements, considerable improvements in depth determination and significantly more accurate formal uncertainty estimates. We demonstrate that the new algorithm, through the use of later phases and testing for depth resolution, considerably clusters event locations more tightly, thus providing an improved view of the seismicity of the Earth. LA - English DB - MTMT ER - TY - JOUR AU - Bondár, István AU - McLaughlin, KL TI - A New Ground Truth Data Set For Seismic Studies JF - SEISMOLOGICAL RESEARCH LETTERS J2 - SEISMOL RES LETT VL - 80 PY - 2009 IS - 3 SP - 465 EP - 472 PG - 8 SN - 0895-0695 DO - 10.1785/gssrl.80.3.465 UR - https://m2.mtmt.hu/api/publication/2747867 ID - 2747867 LA - English DB - MTMT ER - TY - JOUR AU - Bondár, István AU - McLaughlin, K TI - Seismic Location Bias and Uncertainty in the Presence of Correlated and Non-Gaussian Travel-Time Errors JF - BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA J2 - B SEISMOL SOC AM VL - 99 PY - 2009 IS - 1 SP - 172 EP - 193 PG - 22 SN - 0037-1106 DO - 10.1785/0120080922 UR - https://m2.mtmt.hu/api/publication/2747868 ID - 2747868 AB - Correlated travel-time errors bias both seismic location and location uncertainty estimates. Methodologies are introduced to model travel-time correlation structures and to account for them in standard location algorithms. A robust method based on copula theory is used for estimating variogram models for travel-time error. Generic, transportable variogram models are presented for Pn and teleseismic P phases. A linearized iterative location algorithm is introduced that takes into account the correlated travel-time error structure represented by the covariance matrix generated from the generic variogram models for a specific network. We show that ignoring the correlated error structure leads to rapidly deteriorating error ellipse coverage with increasingly correlated networks. We demonstrate through the relocation of ground truth (GT) events that taking into account the correlated model error structure significantly improves error ellipse coverage and, for unbalanced networks, reduces location bias. Monte Carlo experiments show that the deteriorating effect of non-Gaussian error distributions, albeit consistent and nonnegligible, is of secondary importance compared to the penalty paid for ignoring the correlation structure in travel-time errors. LA - English DB - MTMT ER - TY - JOUR AU - Bondár, István AU - Myers, SC AU - Engdahl, ER AU - Bergman, EA TI - Epicentre accuracy based on seismic network criteria JF - GEOPHYSICAL JOURNAL INTERNATIONAL J2 - GEOPHYS J INT VL - 156 PY - 2004 IS - 3 SP - 483 EP - 496 PG - 14 SN - 0956-540X DO - 10.1111/j.1365-246X.2004.02070.x UR - https://m2.mtmt.hu/api/publication/2747875 ID - 2747875 AB - We establish reliable and conservative estimates for epicentre location accuracy using data that are readily available in published seismic bulletins. A large variety of seismic studies rely on catalogues of event locations, making proper assessment of location uncertainty critical. Event location and uncertainty parameters in most global, regional and national earthquake catalogues are obtained from traditional linearized inversion methods using a 1-D Earth model to predict traveltimes. Reported catalogue uncertainties are based on the assumption that error processes are Gaussian, zero mean and uncorrelated. Unfortunately, these assumptions are commonly violated, leading to the underestimation of true location uncertainty, especially at high confidence levels. We find that catalogue location accuracy is most reliably estimated by station geometry. We make use of two explosions with exactly known epicentres to develop local network location (0degrees-2.5degrees) accuracy criteria. Using Monte Carlo simulations of network geometry, we find that local network locations are accurate to within 5 km with a 95 per cent confidence level when the network meets the following criteria: (1) there are 10 or more stations, all within 250 km, (2) an azimuthal gap of less than 110, (3) a secondary azimuthal gap of less than 160 and (4) at least one station within 30 km. To derive location accuracy criteria for near-regional (2.5degrees-10degrees), regional (2.5degrees-20degrees) and teleseismic (28degrees-91degrees) networks, we use a large data set of exceptionally well-located earthquakes and nuclear explosions. Beyond local distances, we find that the secondary azimuthal gap is sufficient to constrain epicentre accuracy, and location error increases when the secondary azimuthal gap exceeds 120degrees. When station coverage meets the criterion of a secondary azimuth gap of less than 120, near-regional networks provide 20 km accuracy at the 90 per cent confidence level, while regional and teleseismic networks provide 25 km accuracy at the 90 per cent confidence level. LA - English DB - MTMT ER -