K¨ovesligethy Rad´oSeismological Observatory HUNGARIAN NATIONAL SEISMOLOGICAL BULLETIN 2013 MTA CSFK GGI - BUDAPEST - HUNGARY Hungarian National Seismological Bulletin 2013 Authors: Zolt´anGr´aczer(editor) 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 2014 Reference: Gr´aczer,Z. (ed.), 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., 2014. Hungarian National Seismological Bulletin 2013, K¨ovesligethy Rad´oSeismological Observatory, MTA CSFK GGI, Budapest, 466pp. 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 94 3 Macroseismic data 95 4 Phase data of regional and teleseismic earthquakes and quarry explosions 130 5 References 464 5 Foreword During the year 2013 the Hungarian National Seismological Network has been extended by three permanent broadband stations. The new stations have been deployed in the Great Hungarian Plain (AMBH and BSZH) and in the Transdanubia (MPLH). In 2013, 169 local events have been detected by the Network and 24 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 origin 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 mechanisms of earthquakes with M>4 are shown. In Chapter 3 the macroseismic data of the Hungarian earthquakes reported by the public 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 Data sources At the end of the year 2013 the Hungarian National Seismological Network (HNSN) operated by the MTA CSFK GGI K¨ovesligethy Rad´oSeismological Observatory consisted of 11 broadband stations (AMBH, BEHE, BSZH, BUD, LTVH, MORH, MPLH, PSZ, SOP, TIH, TRPA) and one short period station (CSKK). During the year three new permanent broadband stations have been integrated into the HNSN. Two of them, AMBH and BSZH have been deployed in the Great Hungarian Plain, in the settlements of Ambr´ozfalva and Besenysz¨og,respectively. The third one (MPLH) has been installed in the westernmost part of the Transdanubian Central Range, near to Magyarpol´any. After the Tenk earthquake (2013.04.22., M=4.8) a temporary station was deployed in the area of Tenk village which operated for more than 4 months. 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 (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 2013, 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 earthquakes 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 9 CHAPTER 1. LOCAL EARTHQUAKES Lon: Longitude of epicenter Depth: Focal depth in kilometer Magnitude: The local magnitude value is given 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 computed because of insufficient data. Erz: Standard error of the focal depth. If Erz={, it means that Erz could not be computed because the focal depth is fixed or because of insufficient data. STAT: Station code CO: Component, S: short period, L: long period, B: broadband, DIST: Epicenter 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 (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 Network in 2013 Figure 1.1: Permanent (green) and temporary (yellow) stations of the Hungarian National Seismological CHAPTER 1. LOCAL EARTHQUAKES 21˚E 21˚E AMBH AMBH TENK TENK 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 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 2013 Station Lat (◦N) Lon (◦E) Height (m) Sensora Acquisitionb Org.c Periodd AMBH 46.3501 20.7258 88 CMG-3T CMG-DM24S3 GGI 02.12-12.31 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 09.11-12.31 Besenysz¨og SeisComp PC BUD PS-6-24 47.4831 19.0201 169 STS-2 GGI 01.01-12.31 Budapest SeisComp PC CSKK K2 47.3631 18.2605 319 SS-1 GGI 01.01-12.31 Cs´okak}o SeisComp PC 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 GGI 10.08-12.31 Magyarpol´any SeisComp PC PSZ PS-6-24 GEOFON 47.9184 19.8944 940 STS-2 01.01-12.31 Piszk´estet}o SeisComp PC GGI SOP PS-6-24 47.6833 16.5583 260 STS-2 GGI 01.01-12.31 Sopron SeisComp PC TENK 47.6542 20.3483 100 CMG-3T CMG-DM24S3 GGI 04.24-06.13 Tenk PS-6-24 STS-2.5 GGI 06.13-09.11 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 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 acquisition system K2 { Kinemetrics K2 data acquisition system PS-6-24 { Earth Data 24 bit digitizer SeisComp { Geofon Seismological Communication Processor 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 2013 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 2013 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 explosions and probable explosions in 2013 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.