Document Type : Research Paper

Author

UNIVERSITY OF ANBAR

Abstract

Three quantitative seismicity maps, the a-value map, the b-value map and the estimated maximum magnitude map, have been prepared for the Arabian Peninsula and surroundings. For preparation of these maps, the frequency- magnitude relation has been used where the constants a and b were estimated using maximum likelihood method. These maps are superimposed on the modified seismotectonic map of Arabian peninsula. These quantitative seismicity maps reveal that the Arabian peninsula consists of four high seismic activity zones: Zagros high, Dead sea rift system high, southern Red sea high and Gulf of Aden and Arab sea high. The b-values determined by this study are compared with those determined by other workers for various regions in the Arabian peninsula. They show a good agreement .The maximum magnitude map reveals a Mmax highs comparable with the a and b highs .

Keywords

 
 [1] Aki, k, (1965) Maximum likelihood estimate of b value in the formula log N=a-bm and its confidence limits. Bull. Earthq. Res. Inst. 43, 23 - 240.
[2] AL -Haddad, M., Siddiqi, G., AL – Zaid, R., Arafah, A., Neciogly, A., Tukelli, N.(1994) A basis for evaluation of seismic hazard and design criteria for the Kingdom of Saudi Arabia. Spectra 10,223-258 .
[3] AL – Amri, A., Schult, F., Bufe, C. (1991). Seismicity and aeromagnetic features of the Gulf of Aqabah ( Elat ) region. Journal Geophysical Research 96, 20179 – 20185 .
[4] AL – Amri, A. (1994) Seismicity of south – western region of the Arabian shield and southern Red Sea. Journal of African Earth Sciences 19,17 – 25 .
[5] AL – Amri, A. (1995a) Recent seismic activity in the northern Red Sea. Journal of Geodynamics 20, 243 – 253 .
[6] AL – Amri, A. (1995b) Preliminary seismic hazard assessment of the southern Red Sea region. European Earthquake Engineering 3, 33 – 38 .
 [7] AL – Amri, A., Punsalan, B., Uy, E.(1998) Spatial distribution of the seismicity parameters in the Red sea region. Journal of Asian Earth Sciences 16, 557 – 563 .
[8] Ambraseys, A.(1988) Seismicity of Saudi Arabia and adjacent areas. Imperial College of Science and Technology, London , U. K.
[9] Barazangi, M.(1981) Evaluation of seismic risk along the western part the Arabian plate: Discussion and Recommendation Bulletin Faculty of Earth Sciences . King Abdulaziz University 4, 77 – 78 .
[10] Ben-Menahem, A.,Vered, D.(1982) Earthquake risk in the Holy Land. Bolletin Geofisica Teorica ed Applicata 24,175-203.
[11] El-Isa , Z., Hasweh,N.(1988)Seismicity of the southern Jordan-Dead sea transform: Proceedings of the 3rd Arab symposium on Earthquake seismology, 8-10 March 1986, pp: 47-85 King Saud University , Riyadh, Saudi Arabia.
[12] El-Isa , Z.,Al-shanti, A.(1989) Seismicity and tectonics of the Red Sea and western Arabia. Geophysical Journal Royal Astronomical Society 97,449-457.
[13] Evernden, J.(1970) Study of regional seismicity and associated problems. [14] Bulletin Seismological Society of America 60,393-446.
[15] Gutenberg, B., Richter, C.(1954) Seismicity of earth and associated.
[16] phenomena. Princeton University press.
[17] Hattori, S.(1974)Regional distribution of b -value in the world. Bulletin.
[18] International Institute Seismology Earthquake Engineering 12,39-57.
[19] Jackson, J., Fitch, T.(1981) Basement faulting and the focal depths of the larger earthquakes in the Zagros mountains (Iran). Geophysical Journal Royal Astronomical Society 64,561-586.
[20] Kaila, K., Narain, H.(1971) A new approach for preparation of seismicity maps as applied to Alpide belt-Sunda arc and adjoining areas. Bulletin Seismological Society of America 61,1275-1291.
[21] Kaila, K., Gaur, V., Narain, H.(1972) Quantitative seismicity map of India .Bulletin Seismological Society of America 62,1119-1132.
[22] Kaila, K., Rao, N., Narain, H.(1974) Seismotectonic map of southwest Asia region comprising eastern Turkey, Caucasus, Persian plateau, Afghanistan and Hindukusk. Bulletin Seismological Society of America  64,657-669.
[23] Kalia, K., Rao,N.(1975) Seismotectonic maps of the European area. Bulletin Seismological Society of America 65,1721-1732.
[24] Karnik, V.(1969 ) Seismicity of the European area, Geophysical Monograph, the earth's crust and upper mantle. American Geophysical Union. Washington D.C.,Seismicity of the European area, part 2. Academia publishing house of the Czechoslovak. Academy of sciences Praha, Czechoslovakia, 123-169.
[25] Karnik, V.(1971) Seismicity of European area part II. Reidel Publishing Company, Dordercht, Holland.
[26] Miyamura, S.(1962) Magnitude-frequency relation of earthquakes and its bearing to geotectonics. Proc Japan Academy 38,27pp.
[27] Mogi, K.(1962) Magnitude-frequency relation for elastic shocks accompanying fractures of various materials and some related problems earthquakes. Bulletin Earthquake Research institute 46,831.
[28] Pisarenko, V.,Lyubushin, A., Lysenko,V. and Golubeba, T.(1996) Statistical estimation of seismic hazard parameters :maximum possible magnitude and related parameters. Bulletin Seismological Society of America 86,691-700.
[29] Ritsema, A (1954) The seismicity of the Sunda arc in space and time. Indonesia Madjalah Ilmu Alam 110,41-49.
[30] Thenhaus , P.,Algermissen, S., Perkins , D., Hansen ,S.,Diment , W.(1986) Probabilistic estimates of the seismic ground motion hazard in western Saudi [31] Arabia,U.S.Geological survey Bulletin 1968 , 40p.
[32] Scholz, C.,(1968) Microfractures, aftershocks and seismicity. Bulletin Seismological Society of America 58 , 1117-1130.
[33] Udias ,A.(1977) Time and magnitude relation for three microaftershock series near Hollister California. Bulletin Seismological Society of America 67,173-185.
[34] Ullmann ,W., Maaz, r.(1966) A new  method for computation of seismicity. Pure and Applied Geophysics 63, 15-22.
[35] Utsu , T.(1965) A method for determining the value of b in a formula log n = a-b M showing the magnitude- frequency relation for earthquakes. Geophys. Bull. Hokkaido Univ. 13,99-103
[36] Welkner, P. ( 1967) On space distribution of some seismic parameters in Japan., Bull. Inter. Inst. Seism .Engineering 4, 1-18.
[37] Wyss, M.(1973) Towards  a physical understanding of the earthquake frequency distribution. Geophysical Journal Royal Astronomical Society 31, 341-359.