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Historical Seismograms - Evidence from the AD 2000 Izu Islands ...

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296 R. G. Valenzuela and L. C. GarciaII111c8--8-5I-EL4\ A\\'\\1 2log R (kml\'z3Figure 3. Attenuation curves for <strong>the</strong> different zones.REFERENCESHowell, B. F. and T. R. Schultz (1975). Attenuation of modified Mercalli intensity withdistance <strong>from</strong> epicenter, Bull. Seism. SOC. Am., 65, 651-665.International Seismological Centre (1964-1976). Monthly Bulletin of Epicenters.Lomnitz, C. (1974). Global Tectonics and Earthquake Risks, Development in Geotectonics5, Elsevier, The Ne<strong>the</strong>rlands, 231 p.National Earthquake Information Service (1983). Preliminary Determination of Epicenters.PAGASA compilation (1985). Catalogue of Philippine earthquakes, 1589-1983, Vols. I-IV,(unpublished).PAGASA compilation (1985). Catalogue of Philippine earthquake epicenters, 1975 September- 1983 May (1985), (unpublished).Repetti, W. C., S. J. (1946). Catalogue of Philippine earthquake, 1589-1899, Bull. Seism.SOC. An., 36, 133-322.Repetti, W. C., S. J. (1945). Seventy five years of seismology in <strong>the</strong> Manila Observatory(Speech delivered in 1945).Su, S. S. (1980). Attenuation of intensity with epicentral distance in <strong>the</strong> Philippines, Bull.Seism. SOC. Am., 70, 1287-1291.Su, S. S. (1985). Seismic source zones of <strong>the</strong> Philippines, 1985 (unpublished).Valenzuela, R. G. and L. C. Garcia (1985). Epicentral estimates of pre-1900 Philippineearthquakes, 1985 (unpublished).

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