Teleseismic moment tensors of the 5 April 2017, Mw6.1, Fariman, northeast Iran, earthquake

• Autorzy: Ashtari Jafari Mohammad

Identyfikatory

DOI

10.1007/s11600-019-00256-8

• Języki publikacji: EN

Abstrakty

EN

On 5 April 2017, an Mw6.1 earthquake occurred about 50 km NE of the city of Fariman, northeast Iran. Several hundreds of aftershocks including two M > 5 events followed the main shock. The quake struck numerous towns and villages across the region, killed one person, and injured tens of people. Many schools and universities were evacuated around the epicentral area, and a lot of people left their residences for a few days. The northeastward motion of the central Iran toward Eurasia influences the epicentral region. Regional movements occur by shortening on the northwest-trending reverse faults. We studied teleseismic source parameters of this earthquake by applying different moment tensor decomposition methods including grid search for the nodal planes of the best double couple; linear inversion for a deviatoric moment tensor; grid search for the best double-couple moment tensor; grid search for the best deviatoric moment tensor; and grid search for the best full moment. Based on the moment tensors, the event occurred on a reverse fault following the regional compressional motion. The results of this study will provide useful information for future regional seismotectonic investigations and are of significant use for applications such as regional seismic hazard evaluations.

Słowa kluczowe

EN

modal plane; moment tensor inversion; double couple; deviatoric moment tensor; full moment tensor

PL

płaszczyzna modalna; odwrócenie momentu tensora

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2019
• Tom: Vol. 67, no. 2
• Strony: 437--448
• Opis fizyczny: Bibliogr. 28 poz.

Twórcy

autor

Ashtari Jafari Mohammad

• Institute of Geophysics, University of Tehran, P.O. Box 16765‑533, Tehran 16, Iran

Bibliografia

• 1. Ashtari Jafari M (2008) Lessons learned from the Bam urban earthquake. In: 14th world conference on earthquake engineering. Beijing, China, https://doi.org/10.13140/rg.2.1.1892.9125
• 2. Ashtari Jafari M (2013) Spatial distribution of seismicity parameters in the Persian Plateau. Earth Plants Space 65:863–869. https://doi.org/10.5047/eps.2013.02.006
• 3. Ashtari Jafari M (2016) Lessons learned from the recent earthquakes in Iran. In: D’Amico S (ed) Earthquakes and their impact on society. Springer International Publishing. https://doi.org/10.1007/978-3-319-21753-6_18
• 4. Aso N, Ohta K, Ide S (2016) Mathematical review on source-type diagrams. Earth Planets Space 68:52. https://doi.org/10.1186/s40623-016-0421-5
• 5. Berberian M, Ghorashi M, Shoja-Taheri J, Talebian M (2000) Seismotectonic and earthquake-fault hazard investigations in the Mashhad-Neyshabour region. Report No. 72, Geological Survey of Iran
• 6. D’Amico S, Cammarata L, Cangemi M, Cavallaro D, Di Martino R, Firetto Carlino M (2014) Seismic moment tensors and regional stress in the area of the December 2013–January 2014, Matese earthquake sequence (Central Italy). J Geodyn 82:118–124
• 7. Dufumier H, Riverra L (1997) On the resolution of the isotropic component in moment tensor inversion. Geophys J Int 131:595–606. https://doi.org/10.1111/j.1365-246X.1997.tb06601.x
• 8. Dziewonski AM, Ekström G, Salganik MP (1992) Centroid-moment tensor solutions for July–September 1991. Phys Earth Planet Inter 72:1–11
• 9. Ekström G, Nettles M, Dziewonski AM (2012) The global CMT project 2004–2010: centroid-moment tensors for 13017 earthquakes. Phys Earth Planet Inter 200:1–9
• 10. Foulger GR, Julian BR (2015) Non-double-couple earthquakes. Encycl Earthq Eng. https://doi.org/10.1007/978-3-642-36197-5_290-1
• 11. Herrmann RB (2013) Computer programs in seismology: an evolving tool for instruction and research. Seismol Res Lett 84:1081–1088
• 12. Herrmann RB, Benz H, Ammon CJ (2011) Monitoring the earthquake source process in north America. Bull Seismol Soc Am 101:2609–2625
• 13. Hjörleifsdottir V, Ekström G (2010) Effects of three-dimensional Earth structure on CMT earthquake parameters. Phys Earth Planet Inter 179:178–190
• 14. Jost ML, Herrmann RB (1989) A student’s guide to and review of moment tensors. Seismol Res Lett 60:37–57
• 15. Julian BR, Miller AD, Foulger GR (1998) Non-double-couple earthquakes 1. Theory Rev Geophys 36:525–549
• 16. Kagan YY (1991) 3-D rotation of double-couple earthquake sources. Geophys J Int 106:709–716
• 17. Kanamori H, Rivera L (2008) Source inversion of W phase: speeding up seismic tsunami warning. Geophys J Int 175:222–238
• 18. Konstantinou KI, Rontogianni S (2011) A comparison of teleseismic and regional seismic moment estimates in the European-mediterranean region. Seismol Res Lett 82:188–200
• 19. Miller AD, Foulger GR, Julian BR (1998) Non-double-couple earthquakes 2. Observations. Rev Geophys 36:551–568
• 20. Montagner JP, Kennett BLN (1996) How to reconcile body-wave and normal-mode reference earth models. Geophys J Int 125:229–248. https://doi.org/10.1111/j.1365-246X.1996.tb06548.x
• 21. Ortega R, Quintanar L, Rivera L (2014) Full moment tensor variations and isotropic characteristics of earthquakes in the Gulf of California transform fault system. Pure Appl Geophys 171:2805–2817. https://doi.org/10.1007/s00024-013-0758-7
• 22. Shabanian E, Bellier O, Siame L, Arnaud N, Abbassi MR, Cocheme JJ (2009) New tectonic configuration in NE Iran: active strike-slip faulting between the Kopeh Dagh and Binalud mountains. Tectonics, 28, TC5002, https://doi.org/10.1029/2008tc002444
• 23. Vavrycuk V (2002) Non-double-couple earthquakes of 1997 January in West Bohemia, Czech Republic: evidence of tensile faulting. Geophys J Int 149:364–373
• 24. Vavrycuk V (2005) Focal mechanisms in anisotropic media. Geophys J Int 161:334–346. https://doi.org/10.1111/j.1365-246X.2005.02585.x
• 25. Vavrycuk V (2015a) Moment tensor decompositions revisited. J Seismol 19:231–252
• 26. Vavrycuk V (2015b) Moment tensors: decomposition and visualization. In: Beer M, Kougioumtzoglou I, Patelli E, Au SK (eds) Encyclopedia of earthquake engineering. Springer, Berlin. https://doi.org/10.1007/978-3-642-36197-5_288-1
• 27. Wessel P, Smith WHF (1995) New version of the generic mapping tools released. EOS 76:329
• 28. Zhu L, Ben-Zion Y (2013) Parameterization of general seismic potency and moment tensors for source inversion of seismic waveform data. Geophys J Int 194:839–843

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).