K¨ovesligethy Rad´oSeismological Observatory HUNGARIAN NATIONAL SEISMOLOGICAL BULLETIN 2014 MTA CSFK GGI - BUDAPEST - HUNGARY Hungarian National Seismological Bulletin 2014 Authors: Zolt´anGr´aczer(editor) Istv´anBond´ar Csenge Czanik Tibor Czifra Erzs´ebet Gy}ori M´artaKiszely P´eterM´onus B´alint S¨ule Gy¨ongyv´erSzanyi L´aszl´oT´oth P´eterVarga Viktor Wesztergom Zolt´anW´eber MTA CSFK GGI K¨ovesligethy Rad´oSeismological Observatory Budapest, Hungary 2015 Reference: Gr´aczer,Z. (ed.), Bond´ar,I., Czanik, Cs., Czifra, T., Gy}ori,E., Kiszely, M., M´onus, P., S¨ule,B., Szanyi, Gy., T´oth,L., Varga, P., Wesztergom, V., W´eber, Z., 2015. Hungarian National Seismological Bulletin 2014, K¨ovesligethy Rad´oSeismological Observatory, MTA CSFK GGI, Budapest, 563pp. Publisher: Dr. Viktor Wesztergom ISSN 2063-8558 This work is licensed under a Creative Commons License. cbed http://creativecommons.org/licenses/by-nc-nd/3.0/ Contents 1 Local earthquakes 9 2 Focal mechanisms 85 3 Macroseismic data 86 4 Phase data of regional and teleseismic earthquakes and quarry explosions 106 5 References 561 5 Foreword During the year 2014 the Hungarian National Seismological Network has been extended by one permanent broadband station in western Hungary which brought the total number of the stations to 13. In 2014, 169 local events have been detected by the Network and 14 Hungarian earthquakes were felt by the public. The focal parameters and phase readings of the local earthquakes are listed in Chapter 1 of this publication. The type of the events (earthquake or explosion) were determined based on the characteristics of the recordings and the data from the quarry managements. In Chapter 2 the focal mechanism of the year's strongest Hungarian earthquake (ML=4.2) is shown. In Chapter 3 the macroseismic data of the felt Hungarian earthquakes are displayed. In Chapter 4 the phase and polarity data of the regional and teleseismic events, earthquakes of unknown origin and known explosions recorded by the Hungarian National Seismological Network are reported. 7 1. Local earthquakes Seismological stations At the end of the year 2014 the Hungarian National Seismological Network (HNSN) operated by the MTA CSFK GGI K¨ovesligethy Rad´oSeismological Observatory consisted of 12 broadband stations (AMBH, BEHE, BSZH, BUD, EGYH, LTVH, MORH, MPLH, PSZ, SOP, TIH, TRPA) and one short period station (CSKK). During the year one new permanent broadband stations has been integrated into the HNSN. It was installed in western Hungary, in the village of Egyh´azaskesz}o(EGYH). Table 1.1 contains the station parameters of the Hungarian National Seismological Network. The position of the stations are shown in Fig. 1.1. The data coming from these stations have been collected and stored in the Observatory using the SeisComP3 software package (http://www.seiscomp3.org). The description of the stations whose data were used in the computations but are situated in the neighbour- ing countries can be found in the publications of the respective operating institutions (Zentralanstalt f¨ur Meteorologie und Geodynamik, Austria; Geofyzik´alni´ustav Akademie vˇed Cesk´erebubliky,ˇ Czech Republic; Urad za seizmologijo in geologijo - Agencija Republike Slovenije za okolje, Slovenia; Geofyzik´alny ´ustav - Slovensk´aakad´emiavied, Slovakia; Institutul National pentru Fizica Pamantului, Romania). Earthquake location In the case of the Hungarian seismological stations, the wave phases have been picked at the Observatory, while for the foreign stations the monthly phase data reports of the partner organizations have been used. In the year 2014, 169 earthquakes and explosions have been located by the Observatory in the area confined by the latitudes 45.5-49.0◦N and longitudes 16.0-23.0◦E (Table 1.2 and Fig. 1.2). The phase picking and magnitude determination was carried out using the Seismic Handler software package (Stammler, 1993). The hypocenter location was performed by the HYPO71PC computer program (Lee and Lahr, 1975). The location is based on the three-layered velocity model of M´onus (1995): Depth range (km) P-wave velocity (km/s) S-wave velocity (km/s) 0-20 5.60 3.15 20-31 6.57 3.69 31- 8.02 4.51 The focal parameters and the phase readings of the located events are given in a form which is based on the Seisan (Havskov and Ottemoller, 1999) bulletin format. The abbreviations used in the listings are: Hour: Origin time in UTC (hr. min. and sec.) Lat: Latitude of epicenter Lon: Longitude of epicenter Depth: Focal depth in kilometer Magnitude: The local magnitude value 9 CHAPTER 1. LOCAL EARTHQUAKES Rms: Root mean square value of travel time residuals Gap: Largest azimuthal separation in degrees between stations. Erh: Standard error of the epicenter. If Erh={, it means that Erh could not be reliably computed because of insufficient data. Erz: Standard error of the focal depth. If Erz={, it means that Erz could not be reliably computed because the focal depth is fixed or because of insufficient data. Locality: If the event occurred in Hungary, Locality is the name of the nearest settlement, otherwise the name of the country. STAT: Station code CO: Component, S: short period, L: long period, B: broadband, DIST: Epicentral distance (km) AZI: Azimuth from source to station PHASE: Phase; The first letter characterizes onset E(mergent) or I(mpulsive) P: Polarity (C for compression, D for dilatation ) HR: Hour MN: Minute SECON: Seconds TRES: Residual (seconds) CODA: Signal duration in seconds AMPL: Ground Amplitude (0.5*(peak to peak)), (nm) at period PERI PERI: Period where amplitude is measured BAZ: Back azimuth (from station to event) ARES: Back azimuth residual VELO: Apparent phase velocity (km/sec) WT: Weight of phase in the location 10 49˚N 48˚N 47˚N 46˚N 23˚E 23˚E TRPA TRPA 22˚E 22˚E LTVH LTVH CHAPTER 1. LOCAL EARTHQUAKES 21˚E 21˚E AMBH AMBH Figure 1.1: Stations of the Hungarian National Seismological Network in 2014 BSZH BSZH 20˚E 20˚E PSZ PSZ 19˚E 19˚E BUD BUD MORH MORH CSKK CSKK 18˚E 18˚E TIH TIH MPLH MPLH EGYH EGYH 17˚E 17˚E BEHE BEHE SOP SOP 16˚E 16˚E 49˚N 48˚N 47˚N 46˚N 11 CHAPTER 1. LOCAL EARTHQUAKES Table 1.1: Parameters of the stations of the Hungarian National Seismological Network in 2014 Station Lat (◦N) Lon (◦E) Height (m) Sensora Acquisitionb Org.c Periodd AMBH 46.3501 20.7258 88 CMG-3T CMG-DM24S3 GGI 01.01-12.31 Ambr´ozfalva BEHE PS-6-24 46.4706 16.7757 289 STS-2 GGI 01.01-12.31 Becsehely SeisComP PC BSZH PS-6-24 47.2996 20.2670 82 STS-2 GGI 01.01-10.21 Besenysz¨og SeisComP PC CMG-3T CMG-DM24S3 10.21-12.31 BUD PS-6-24 47.4831 19.0201 169 STS-2 GGI 01.01-12.31 Budapest SeisComP PC CSKK 47.3631 18.2605 319 SS-1 CMG-DM24S3 GGI 01.01-03.27 Cs´okak}o CMG-DAS 03.27-12.31 EGYH 47.4163 17.3319 129 CMG-3T CMG-DM24S3 GGI 07.24-12.31 Egyh´azaskesz}o LTVH 47.3849 21.9007 121 CMG-3T CMG-DM24S3 GGI 01.01-12.31 L´etav´ertes MORH PS-6-24 46.2149 18.6435 135 STS-2 GGI 01.01-12.31 M´or´agy SeisComP PC MPLH PS-6-24 47.1712 17.5348 337 STS-2.5 GGI 01.01-12.31 Magyarpol´any SeisComP PC PSZ PS-6-24 GEOFON 47.9181 19.8933 940 STS-2 01.01-12.31 Piszk´estet}o SeisComP PC GGI SOP PS-6-24 47.6807 16.5567 260 STS-2 GGI 01.01-12.31 Sopron SeisComP PC TIH GGI 46.9001 17.8878 189 CMG-3T CMG-DM24S3 01.01-12.31 Tihany MFGI TRPA PS-6-24 48.1304 22.5391 113 STS-2 GGI 01.01-12.31 Tarpa SeisComP PC a Sensors: CMG-3T { Guralp CMG-3T broadband seismometer SS-1 { Kinemetrics SS-1 short period seismometer STS-2 and STS-2.5 { Streckeisen broadband seismometers b Data acquisition units (at all stations the recording is digital and continuous): CMG-DM24S3 { Guralp CMG-DM24S3EAM data acquisition system CMG-DAS { Guralp CMG-DAS data acquisition system PS-6-24 { Earth Data 24 bit digitizer SeisComP PC { PrioComP computer equipped with SeisComP software c Operating organization: GEOFON { GEOFON Global Seismic Network, GFZ, Germany GGI { Geodetic and Geophysical Institute, MTA CSFK, Hungary MFGI { Hungarian Geological and Geophysical Institute, Hungary d Availability period in 2014 12 N N N N ˚ ˚ ˚ ˚ 49 48 47 46 E E ˚ ˚ 23 23 1 5 3 4 2 Magnitude E E ˚ ˚ 22 22 E E ˚ ˚ CHAPTER 1. LOCAL EARTHQUAKES 21 21 E E ˚ ˚ 20 20 Figure 1.2: The epicenters of the located earthquakes in 2014 E E ˚ ˚ 19 19 E E ˚ ˚ 18 18 E E ˚ ˚ 17 17 E E ˚ ˚ 16 16 N N N N ˚ ˚ ˚ ˚ 49 48 47 46 13 N N N N ˚ ˚ ˚ ˚ 49 48 47 46 E E ˚ ˚ 23 23 1 2 Magnitude E E ˚ ˚ 22 22 E E ˚ ˚ 14 21 21 Figure 1.3: The epicenters of the located explosions and probable explosions in 2014 E E ˚ ˚ 20 20 E E ˚ ˚ 19 19 E E ˚ ˚ 18 18 CHAPTER 1. LOCAL EARTHQUAKES E E ˚ ˚ 17 17 E E ˚ ˚ 16 16 N N N N ˚ ˚ ˚ ˚ 49 48 47 46 CHAPTER 1. LOCAL EARTHQUAKES Table 1.2: Parameters of events detected by the Hungarian National Seismological Network. Date Time Lat. (◦N) Lon. (◦E) Depth (km) Magnitude Locality 1. 2014.01.10 06:53:04.9 45.984 16.959 12.5 2.5 Croatia 2.