Quantifying capability of a local seismic network in terms of locations and focal mechanism solutions of weak earthquakes

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• 作者：Lucia Fojt铆kov谩 ; Miriam Kristekov谩 ; Ji艡铆 M谩lek ; Efthimios Sokos…
• 关键词：Seismic network ; Relative location uncertainty ; Focal ; mechanism uncertainty ; Waveform inversion ; Uncertainty mapping ; Weak earthquakes ; Little Carpathians
• 刊名：Journal of Seismology
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：20
• 期：1
• 页码：93-106
• 全文大小：4,510 KB
• 参考文献：Benetatos C, M谩lek J, Verga F (2013) Moment tensor inversion for two micro-earthquakes occurring inside the H谩je gas storage facilities, Czech Republic. J Seismol 17:557鈥?77. doi:10.鈥?007/鈥?s10950-012-9337-0 CrossRef
  Fojt铆kov谩 L (2010b) Earthquake moment tensors and tectonic stress in Mal茅 Karpaty Doctoral thesis (in Slovak) http://鈥媤ww.鈥媐yzikazeme.鈥媠k/鈥媘ainpage/鈥媝race/鈥?010_鈥婸hD_鈥婩ojtikova.鈥媝df
  Fojt铆kov谩 L, Zahradn铆k J (2014) A new strategy for weak events in sparse networks: the first-motion polarity solutions constrained by single-station waveform inversion. Seismol Res Lett 85:1265鈥?274. doi:10.鈥?785/鈥?220140072 CrossRef
  Fojt铆kov谩 L, Vavry膷uk V, Cipciar A, Madar谩s J (2010) Focal mechanisms of micro-earthquakes in the Dobr谩 Voda seismoactive area in the Mal茅 Karpaty Mts. (Little Carpathians), Slovakia. Tectonophysics 492:213鈥?29CrossRef
  Herrmann RB (1979) FASTHYPO鈥攁 hypocenter location program. Earthq Notes 50(2):25鈥?7
  Kagan YY (1991) 3-D rotation of double-couple earthquake sources. Geophys J Int 106:709鈥?16. doi:10.鈥?111/鈥媕.鈥?365-246X.鈥?991.鈥媡b06343.鈥媥 CrossRef
  K谩rn铆k V (1968) Seismicity of the EuropeanArea. Part 1. Academia, Praha
  McLaren JP, Frohlich C (1985) Model calculations of regional network locations for earthquakes in subduction zones. Bull Seismol Soc Am 75:397鈥?13
  Michele M, Cust贸dio S, Emolo A (2014) Moment tensor resolution: case study of the Irpinia seismic network, Southern Italy. Bull Seismol Soc Am 104:1348鈥?357. doi:10.鈥?785/鈥?120130177 CrossRef
  Panza GF, Sarao A (2000) Monitoring volcanic and geothermal areas by full seismic moment tensor inversion: are non-double-couple components always artefacts of modelling? Geophys J Int 143:353鈥?64CrossRef
  Press WH, Teukolsky SA, Vetterling WT, Flannery BP (1997) Numerical Recipes in Fortran 77: The Art of Scientific Computing, Second Ed., Cambridge University Press, 992 pages.
  艩铆len媒 J (2009) Resolution of non-double-couple mechanisms: Simulation of hypocenter mislocation and velocity structure mismodeling. Bull Seismol Soc Am 99(4):2265鈥?272. doi:10.鈥?785/鈥?120080335 CrossRef
  艩铆len媒 J, Campus P, Panza GF (1996) Seismic moment tensor resolution by waveform inversion of a few local noisy records - I. Synthetic tests. Geophys J Int 126:605鈥?19CrossRef
  Snoke JA (2003) FOCMEC: FOcal MEChanism determinations. In: Lee WHK, Kanamori H, Jennings PC, Kisslinger C (eds) International handbook of earthquake and engineering seismology. Academic Press, San Diego, Chapter 85.12
  Sokos E, Zahradn铆k J (2008) ISOLA a Fortran code and a Matlab GUI to perform multiple-point source inversion of seismic data. Comput Geosci 34:967鈥?77CrossRef
  Sokos E, Zahradn铆k J (2013) Evaluating centroid-moment-tensor uncertainty in the new version of ISOLA software. Seismol Res Lett 84:656鈥?65CrossRef
  Sta艌ek F, Eisner L, Moser TJ (2013) Stability of source mechanisms inverted from P-wave amplitude microseismic monitoring data acquired at the surface. Geophys Prospect 62:475鈥?90. doi:10.鈥?111/鈥?365-2478.鈥?2107
  Stierle E, Vavry膷uk V, 艩铆len媒 J, Bohnhoff M (2014) Resolution of non-double-couple components in the seismic moment tensor using regional networks鈥擨: a synthetic case study. Geophys J Int 196:1869鈥?877. doi:10.鈥?093/鈥媑ji/鈥媑gt502 CrossRef
  Uhrhammer RA (1980) Analysis of small seismographic station networks. Bull Seismol Soc Am 70:1369鈥?379
  Vavry膷uk V, Kuehn D (2012) Moment tensor inversion of waveforms: a two-step time-frequency approach. Geophys J Int 190:1761鈥?776. doi:10.鈥?111/鈥媕.鈥?365-246X.鈥?012.鈥?5592.鈥媥 CrossRef
  W茅ber Z (2009) Estimating source time function and moment tensor from moment tensor rate functions by constrained L1 norm minimization. Geophys J Int 178:889鈥?00CrossRef
  Zahradn铆k J, Cust贸dio S (2012) Moment tensor resolvability: application to southwest Iberia. Bull Seismol Soc Am 102:1235鈥?254. doi:10.鈥?785/鈥?120110216 CrossRef
  Zhao P, Oye V, Kuhn D, Cesca S (2014) Evidence for tensile faulting deduced from 614 full waveform moment tensor inversion during the stimulation in the Basel enhanced 615 geothermal system. Geothermics 52:74鈥?3. doi:10.鈥?016/鈥媕.鈥媑eothermics.鈥?014.鈥?1.鈥?03 CrossRef
  Zollo A, Iannaccone G, Lancieri M, Cantore L, Convertito V, Emolo A, Festa G, Gallovi膷 F, Vassallo M, Martino C, Satriano C, Gasparini P (2009) The earthquake early warning system in Southern Italy: methodologies and performance evaluation. Geophys Res Lett 36:L00B07. doi:10.鈥?029/鈥?008GL036689 CrossRef
  Zs铆ros T (2005) Seismicity of the Western-Carpathians. Acta Geod Geophys Hung 40:1217鈥?977CrossRef
  
• 作者单位：Lucia Fojt铆kov谩 (1) (2)
  Miriam Kristekov谩 (2) (3)
  Ji艡铆 M谩lek (1)
  Efthimios Sokos (4)
  Kristi谩n Csicsay (2)
  Ji艡铆 Zahradn铆k (5)
  
  1. Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic, v.v.i, Prague, Czech Republic
  2. Earth Science Institute, Slovak Academy of Sciences, Bratislava, Slovakia
  3. Comenius University in Bratislava, Bratislava, Slovakia
  4. Department of Geology, Seismological Laboratory, University of Patras, Patras, Greece
  5. Faculty of Mathematics and Physics, Charles University in Prague, Prague, Czech Republic
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geophysics and Geodesy
  Structural Geology
  Hydrogeology
  Geotechnical Engineering
  
• 出版者：Springer Netherlands
• ISSN：1573-157X

文摘

Extension of permanent seismic networks is usually governed by a number of technical, economic, logistic, and other factors. Planned upgrade of the network can be justified by theoretical assessment of the network capability in terms of reliable estimation of the key earthquake parameters (e.g., location and focal mechanisms). It could be useful not only for scientific purposes but also as a concrete proof during the process of acquisition of the funding needed for upgrade and operation of the network. Moreover, the theoretical assessment can also identify the configuration where no improvement can be achieved with additional stations, establishing a tradeoff between the improvement and additional expenses. This paper presents suggestion of a combination of suitable methods and their application to the Little Carpathians local seismic network (Slovakia, Central Europe) monitoring epicentral zone important from the point of seismic hazard. Three configurations of the network are considered: 13 stations existing before 2011, 3 stations already added in 2011, and 7 new planned stations. Theoretical errors of the relative location are estimated by a new method, specifically developed in this paper. The resolvability of focal mechanisms determined by waveform inversion is analyzed by a recent approach based on 6D moment-tensor error ellipsoids. We consider potential seismic events situated anywhere in the studied region, thus enabling 鈥渕apping鈥?of the expected errors. Results clearly demonstrate that the network extension remarkably decreases the errors, mainly in the planned 23-station configuration. The already made three-station extension of the network in 2011 allowed for a few real data examples. Free software made available by the authors enables similar application in any other existing or planned networks. Keywords Seismic network Relative location uncertainty Focal-mechanism uncertainty Waveform inversion Uncertainty mapping Weak earthquakes Little Carpathians