AN EARTHQUAKE CATALOG OF MID-ATLANTIC RIDGE

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Published: Jul 27, 2016
DOI: https://doi.org/10.12681/bgsg.11832
Keywords:
Complete homogeneous earthquake catalog Moment magnitude Magnitude completeness
E. Teza
Department of Geophysics, Faculty of Geology, School of Science, Aristotle University
E.M. Scordilis
Department of Geophysics, Faculty of Geology, School of Science, Aristotle University
C.B. Papazachos
Department of Geophysics, Faculty of Geology, School of Science, Aristotle University
G.F. Karakaisis
Department of Geophysics, Faculty of Geology, School of Science, Aristotle University
Abstract

The Mid-Atlantic Ridge (M-AR), which runs along the centre of the Atlantic Ocean, is one of the best known divergent boundaries. Seismic studies have been a crucial factor in deciphering the structure of the oceanic crust. For their performance a necessary prerequisite is the compilation of a reliable earthquake catalog of the broader area. In this study, an attempt was made to create an earthquake catalog of M-AR that could become a useful “tool” for large-scale seismological studies of this region. For this reason a very large sample of data from several seismological centers, as well as from already published catalogs of strong earthquakes, was collected and examined. ISC was considered as the main reference agency, while as reference magnitude scale the moment magnitude scale, MW was adopted. The main goal was to identify and organize the best and most recent information available for earthquakes falling within the time window 1900-2014 and the space window bounded by the extended coordinates ~ 81 (N) to -51 (S) and 10 (E) to ~ -50 (W). After magnitude homogenization, check of focal depths and definition of completeness magnitude, a reliable and homogeneous earthquake catalog of M AR consisting of 14,211 events was created, available for any seismological use and further study.

Article Details
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  • Geophysics and Seismology
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References
Bohnenstiehl, D.R. and Dziak, R.P., 2008. Mid-Ocean Ridge Seismicity. In: Steele, J., Thorpe, S.
and Turekian, K., eds., Encyclopedia of Ocean Sciences, First Online Update, Academic
Press, London, UK.
Engdahl, E.R. and Villaseñor, A., 2002. Global Seismicity, 1900-1999. In: International Handbook
of Earthquake and Engineering Seismology, Part A, chapter 41, 665-690, Lee, W.H.K.,
Kanamori, H., Jennings, P.C. and Kisslinger, C., eds., Academic Press.
Frisch, W., Meschede, M. and Blakey, R.C., 2011. Plate Tectonics, Continental Drift and Mountain
Building, Springer-Verlag Berlin Heidelberg, 212, 59-74.
Gutenberg, B., 1945a. Amplitudes of Surface Waves and Magnitude of Shallow Earthquakes, Bull.
Seismol. Soc. Amer., 35, 3-12.
Gutenberg, B., 1945b. Amplitudes of P, PP, and S and Magnitude of Shallow Earthquakes, Bull.
Seismol. Soc. Amer., 35, 57-69.
Gutenberg, B., 1945c. Magnitude Determination for Deep-focus Earthquakes, Bull. Seismol. Soc.
Amer., 35, 117-130.
Gutenberg, B. and Richter, C.F., 1936. On Seismic Waves (third paper), Gerlands Beitrage zur
Geophysik, 47, 73-131.
Gutenberg, B. and Richter, C.F., 1944. Frequency of earthquakes in California, Bull. Seism. Soc.
Am., 34, 185-188.
Hanks, T. and Kanamori, H., 1979. A moment magnitude scale, J. Geophys. Res., 84, 2348-2350.
Heaton, T., Tajima, F. and Mori, A., 1986. Estimating ground motions using recorded accelerograms,
Surv. Geophys., 8, 25-83.
Heezen, B.C., 1960. The rift in the ocean floor, Scient. American, 203, 98-110.
Hekinian, R., 1982. Petrology of the ocean floor, Elsevier, Amsterdam.
Hess, H.H., 1962. History of ocean basins. In: Petrologic Studies: A Volume to Honor A.F.
Buddington, Engel, A.E.J., et al., eds., Geological Society of America, New York, 599-620.
Ishimoto, M. and Iida, K., 1939. Observations sur les seisms enregistrè par le microseismograph
construite dernierment (I), Bull. Earthq. Res. Inst., 17, 443-478.
Johnston, A.C., 1996. Seismic moment assessment of earthquakes in stable continental regions - I.
Instrumental seismicity, Geophys. J. Int., 124, 381-414.
Kanamori, H., 1977. The energy release in great earthquakes, J. Geophys. Res. 82, 2981-2987.
Macdonald, K.C. and Fox, P.J., 1990. The mid-ocean ridge, Scientific American, 262, 72-79.
Macdonald, K.C., 2001. Mid-ocean ridge tectonics, volcanism and geomorphology, In:
Encyclopedia of Ocean Sciences, Steele, J., Thorpe, S. and Turekian, K., eds., Academic
Press, 1798-1813.
Marsan, D. and Wyss, M., 2011. Seismicity rate changes, Community Online Resource for Statistical
Seismicity Analysis, doi: 10.5078/corssa-25837590.
Mason, R.G. and Raff, A.D., 1961. A magnetic survey off the west coast of North America 32° N to
° N, Bulletin of the Geological Society of America, 72, 1259-1265.
Pacheco, J.F. and Sykes, L.R., 1992, Seismic moment catalog of large shallow earthquakes, 1900 to
, Bull. Seism. Soc. Am., 82, 1306-1349.
Papazachos, B.C., Karakostas, V.G., Kiratzi, A.A., Margaris, B.N., Papazachos, C.B. and Scordilis, E.M.,
Uncertainties in the estimation of earthquake magnitudes in Greece, J. Seismol., 6, 557-570.
Richter, C., 1935. An instrumental earthquake magnitude scale, Bull. Seism. Soc. Am., 25, 1-32.
Ringdal, F., 1994. GSETT-3: a test of an experimental international seismic monitoring system,
Annali di Geofisica, 37, 241-245.
Scordilis, E.M., 2006. Empirical global relations converting MS and mb to moment magnitude,
Journal of Seismology, 10, 225-236.
Sykes, L.R., 1970. Earthquake swarms and sea-floor spreading, J. Geophys. Res., 75, 6598-6611.
Utsu, T., 2002. Relationships between magnitude scales, International Handbook of Earthquake and
Engineering Seismology, 81, 733-746.
Vine, F.J. and Matthews, D.H., 1963. Magnetic anomalies over oceanic ridges, Nature, 199, 947-949.
Wessel, P. and Smith, W., 1995. New version of the Generic Mapping Tools, EOS, 76-329.
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