Nätet


Det svenska nationella seismiska nätet (SNSN) består för närvarande av 65 moderna bredbandiga seismiska stationer utspridda över landet, från Skåne i söder till Torneträsk i norr. Samtliga stationer är kopplade till en central dator i Uppsala via uppringbart modem eller internet.

Huvudsyftet med det seismiska nätet är att samla in seismiskt data från svenska jordskalv (ca. 500 - 700 skalv per år), samt från större jordskalv utanför Sverige. I Sverige inträffar ungefär ett skalv per år som har magnitud över 3.0 på Richterskalan, ca. 10 skalv per år med magnitud mellan 2.0 och 3.0 och resten är skalv som har magnitud mindre än 2.0 och därmed inte känns på markytan. Dessa småskalv registreras endast av de seismiska stationerna, som kan känna av skalv ner till ca. magnitud -1. Data från de lokala skalven används bla. för att öka kunskapen om de pågående deformationsprocesserna i den svenska jordskorpan, som tex. samspelet mellan kontinentalplattornas rörelser och landhöjningen efter inlandsisen. Datat från jordskalv på längre avstånd används tex. för att studera den svenska jordskorpans och övre mantelns struktur under de registrerande stationerna.

Publikationer relaterade till SNSN:

Tidskriftsartiklar:

Ye, L., Kanamori, H., Avouac, J-P., Li, L., Cheung, K.F., Lay, T. (2016) The 16 April 2016, Mw 7.8 (Ms 7.5) Ecuador earthquake: A quasi-repeat of the 1942 Ms 7.5 earthquake and partial re-rupture of the 1906 Ms 8.6 Colombia-Ecuador earthquake, Earth Planet. Sci. Lett., 454, 248-258, doi: 10.1016/j.epsl.2016.09.006.

Ahmadi, O., C. Juhlin, M.V.S. Ask, B. Lund (2015) Revealing the deeper structure of the end-glacial Pärvie fault system in northern Sweden by seismic reflection profiling, Solid Earth, 6, 621-632, doi:10.5194/se-6-621-2015.

Köhler, A., V. Maupin, N. Balling (2015) Surface wave tomography across the Sorgenfrei-Tornquist Zone, SW Scandinavia, using ambient noise and earthquake data, Geophys. J. Int., 203,284-311, doi: 10.1093/gji/ggv297

Lindblom, E., B. Lund, A. Tryggvason, M. Uski, R. Bödvarsson, C. Juhlin, R. Roberts (2015) Microearthquakes illuminate the deep structure of the endglacial Pärvie fault, northern Sweden, Geophys. J. Int, doi: 10.1093/gji/ggv112.

Vinnik, L., Oreshin, S., Makeyeva, L., Peregoudov, D., Kozlovskaya, E., Pedersen, H., …, Bödvarsson, R., …, Roberts, R.,…, Shomali, H., …, Volosov, S. (2014). Anisotropic lithosphere under the Fennoscandian shield from P receiver functions and SKS waveforms of the POLENET/LAPNET array. Tectonophysics, 628, 45-54.

Grad, M., Tiira, T., Olsson, S. and Komminaho, K. (2014). Seismic lithosphere-asthenosphere boundary beneath the Baltic Shield. GFF, 136(4), 581-598.

Kind, R., Sodoudi, F., Yuan, X., Shomali, Z. H., Roberts, R., Gee, D. G., …, Geissler, W. H. (2013). Scandinavia: A former Tibet?. Geochemistry Geophysics Geosystems, 14(10), 4479-4487.

Maupin, V., A. Agostini, I. Artemieva, N. Balling, F. Beekman, J. Ebbing, R.W. England, A. Frassetto, S. Gradmann, B.H. Jacobsen, A. Köhler, T. Kvarven, A.B. Medhus, R. Mjelde, J. Ritter, D. Sokoutis, W. Stratford, H. Thybo, B. Wawerzinek, C. Weidle (2013) The deep structure of the Scandes and its relation to tectonic history and present-day topography, Tectonophysics, 602, 15-37, doi: 10.1016/j.tecto.2013.03.010

Frassetto, A., Thybo, H. (2013) Receiver function analysis of the crust and upper mantle in Fennoscandia – isostatic implications, Earth Planet. Sci. Lett., 381, 234-246, doi: 10.1016/j.epsl.2013.07.001

Tarvainen, M., Valtonen, O., Husebye, E. and Lund, B. (2013). Seismic analysis of aircraft accidents. Natural Science, 5(7), 811-817.

Medhus, A.B., N. Balling, B. H. Jacobsen, C. Weidle, R. W. England, R. Kind, H. Thybo, and P. Voss (2012) Upper-mantle structure beneath the Southern Scandes Mountains and the Northern Tornquist Zone revealed by P-wave traveltime tomography, Geophys. J. Int., 189 (3): 1315-1334 doi:10.1111/j.1365-246X.2012.05449.x

Roy, C. and Ritter, J.R.R (2012) Complex deep seismic anisotropy below the Scandinavian Mountains, J. Seismol., 17, 361-384, DOI 10.1007/s10950-012-9325-4.

Zhu, H., Bozdag, E., Peter, D., Tromp, J. (2012) Structure of the European upper mantle revealed by adjoint tomography, Nature Geosci, 5, 493-498, doi: 10.1038/ngeo1501.

Eken, T., Plomerová, J., Vecsey, L., Babuška, V., Roberts, R., Shomali, H. and Bödvarsson, R. (2012). Effects of seismic anisotropy on P-velocity tomography of the Baltic Shield. Geophys. J. Int., 188(2), 600-612.

Juhlin, C. and Lund, B. (2011). Reflection seismic studies over the end-glacial Burträsk fault, Skellefteå, Sweden. Solid Earth, 2, 17-23.

Juhlin, C., Dehghannejad, M., Lund, B., Malehmir, A. and Pratt, G. (2010). Reflection seismic imaging of the end-glacial Pärvie Fault system, northern Sweden. Journal of Applied Geophysics, 70(4), 307-316.

Eken, T., Plomerová, J., Roberts, R., Vecsey, L., Babuška, V., Shomali, H. and Bödvarsson, R. (2010). Seismic anisotropy of the mantle lithosphere beneath the Swedish National Seismological Network (SNSN). Tectonophysics, 480(1-4), 241-258.

Eken, T., Shomali, Z. H., Roberts, R., Hieronymus, C. F. and Bödvarsson, R. (2008). S and P velocity heterogeneities within the upper mantle below the Baltic Shield. Tectonophysics, 462(1-4), 109-124.

Olsson, S., Roberts, R. and Bödvarsson, R. (2008). Moho depth variation in the Baltic Shield from analysis of converted waves. GFF, 130, 113-122.

Eken, T., Shomali, Z. H., Roberts, R. and Bödvarsson, R. (2007). Upper-mantle structure of the Baltic Shield below the Swedish National Seismological Network (SNSN) resolved by teleseismic tomography. Geophys. J. Int., 169(2), 617-630.

Olsson, S., Roberts, R. and Bödvarsson, R. (2007). Analysis of waves converted from S to P in the upper mantle beneath the Baltic Shield. Earth Planet. Sci. Lett., 257(1-2), 37-46.

Olsson, S., Roberts, R., Shomali, H. and Bödvarsson, R. (2007). Tomographic inversion of P410s delay times for simultaneous determination of P and S velocities of the upper mantle beneath the Baltic Shield. Phys. Earth Planet. Int., 160(2), 157-168.

Hieronymus, C. F., Shomali, Z. H. and Pedersen, L. B. (2007). A dynamical model for generating sharp seismic velocity contrasts underneath continents: Application to the Sorgenfrei-Tornquist Zone. Earth Planet. Sci. Lett., 262(1-2), 77-91.

Gregersen, S., Voss, P., Shomali, H., Grad, M. and Roberts, R. G. (2006). Physical differences in the deep lithosphere of northern and central Europe. Geological Society of London, Memoirs, 32, 313-322.

Bödvarsson, R. and Lund, B. (2003). The SIL Seismological Data Acquisition System - As Operated in Iceland and in Sweden. In: Methods and Applications of Signal Processing in Seismic Network Operations (pp. 268). Springer, Heidelberg.

Lund, B. and R. Bödvarsson, 2002. Correlation of microearthquake body-wave spectral amplitudes, Bull. Seismol. Soc. Am., 92, 2419-2433.

Shomali, H. and Slunga, R. 2000. Body wave moment tensor inversion of local earthquakes: An application to the South Iceland seismic zone. Geophys. J. Int., 140:63-70.

Bödvarsson, R. (1999) The new Swedish seismic network. Orfeus Newsletter 1(3).

Bödvarsson R., Rögnvaldsson S.Th., Slunga R. and Kjartansson E. 1999, The SIL data acquisition system at present and beyond year 2000. Phys Earth Planet. Intern. 113 89-101.

Lund, B. and Slunga, R. 1999. Stress tensor inversion using detailed microearthquake information and stability constraints: Application to Ölfus in southwest Iceland. J. Geophys. Res., 104:14947-14964.

Bödvarsson, R.,Rögnvaldsson, S.Th., Jakobsdottir, S.S., Slunga, R., Stefánsson, R., 1996. The SIL data acquisition and monitoring system. Seismol. Res. Lett., 67, 35-46.

Slunga, R., Rögnvaldsson, S. T., and Bödvarsson, R. (1995). Absolute and relative locations of similar events with application to microearthquakes in southern Iceland. Geophys. J. Int., 123:409-419.

Rögnvaldsson, S. T. and Slunga, R. (1993). Routine fault plane solutions for local networks: A test with synthetic data. Bull. Seismol. Soc. Am., 83(4):1232-1247.

Slunga, R. (1981). Earthquake source mechanism determination by use of bodywave amplitudes - an application to Swedish earthquakes. Bull. Seismol. Soc. Am., 71(1):25-35.

Avhandlingar:

Lindblom, E. (2011) Microearthquake Study of End-glacial Faults in Northern Sweden, Licentiate thesis, Dep. of Earth Sciences, Uppsala University.

Eken, T. (2009) Isotropic and Anisotropic P and S Velocities of the Baltic Shield Mantle: Results from Analyses of Teleseismic Body Waves, Doctoral thesis, Dep. of Earth Sciences, Uppsala University, Acta Universitatis Upsaliensis.

Olsson, S. (2007) Analyses of Seismic Wave Conversion in the Crust and Upper Mantle beneath the Baltic Shield, Doctoral thesis, Dep. of Earth Sciences, Uppsala University, Acta Universitatis Upsaliensis.

Rapporter:

Bödvarsson, R. (2002 - 2015) Swedish National Seismic Network (SNSN). A short report on recorded earthquakes during the Nth quarter of the year 20YY, quaterly reports to the Swedish Nuclear Fuel and Waste Management Co., Stockholm, Sweden.

Lund, B., R. Bödvarsson, L. Dynesius, J. Kamm, M. Schieschke (2015) Forsmark site investigation. Study of signals induced in a 150 m long borehole mounted cable in the Forsmark area. Submitted to the Swedish Nuclear Fuel and Waste Management Co., Stockholm, Sweden.

Sarri, J. (ed.), B. Lund, P. Mäntyniemi, K. Oinonen, T. Tiira, M. Uski, T. Vuorinen (2015) Evaluating seismic hazard for the Hanhikivi nuclear power plant site, Seismological characteristics of the seismic source areas and attenuation of seismic signals, NE-3957, ÅF-Consult Oy, Helsinki, Finland.

Korja, A., Kosonen (eds) (2014) Evaluating seismic hazard for the Hanhikivi nuclear power plant site, part 2. Seismotectonic framework and seismic source area models in Fennoscandia, northern Europe, S-61, Institute of Seismology, University of Helsinki, Finland.

Lund, B., R. Bödvarsson, L. Dynesius, M. Schieschke (2014) Forsmark site investigation. Study of high-frequency seismic signals in the Forsmark area. Submitted to the Swedish Nuclear Fuel and Waste Management Co., Stockholm, Sweden.

Lund, B., Bödvarsson, R., Shomali, H. and Dynesius, L. (2012). Study of seismic background signals in the Forsmark area. Forsmark site investigation, P-12-06, Swedish Nuclear Fuel and Waste Management Co., Stockholm, Sweden.

Lagerbäck, R and Sundh, M. (2008) Early Holocene faulting and paleoseismicity in northern Sweden, C 836, Swedish Geological Survey of Sweden, pp. 84.

Bödvarsson, R., Lund, B., Roberts, R. and Slunga, R. (2006). Earthquake activity in Sweden. Study in connection with a proposed nuclear waste repository in Forsmark or Oskarshamn. R-06-67, Swedish Nuclear Fuel and Waste Management Co., Stockholm, Sweden.

Lund, B. (2005) Large earthquakes during a glacial cycle, in S. Hora and M. Jensen Expert panel elicitation of seismicity following glaciation in Sweden, Report 2005:20, Swedish Radiation Protection Authority (SSI), Stockholm, Sweden, p. 107-119.

Bödvarsson, R., Lund, B., Roberts, R., Slunga, R. och Tryggvason, A. (2004). Seismologisk studie relaterad till Citybanan i Stockholm.

Hagos, L., Roberts, R., Slunga, R., Bödvarsson, R. and Lund, B. (2004). A preliminary study regarding measures of earthquake risk in Sweden. In: Värdering av jordbävningsrisk - förstudie, Report to "Kraftbolagens Beräkningsgrupp": Swedish Nuclear Power Inspectorate (SKI), Stockholm, Sweden.

 

SNSN webmaster email: bjorn.lund at geo.uu.se