Another look at the 1993 and 1995 Gulf of Aqaba earthquakes from the analysis of teleseismic waveforms

• Autorzy: Abdel-Fattah A. , Hussein H. , El-Hady S.
• Języki publikacji: EN

Abstrakty

EN

In this work we estimated the source process and the source parameters of the 1993 and 1995 Gulf of Aqaba earthquakes. To investigate the source process of both events, we inverted the teleseismic P- and SH-waveform data using an iterative technique in which the rupture is modeled as a series of point source subevents with varying mechanisms. The main source process of the 1993 event can be explained by two subevents with essentially the same mechanism. These two subevents had different focal depths. The second subevent was about 5 s later than the first one and about 70% of the moment rate released with the second one. The total rupture duration time was about 12 s. Our solution for the 1995 Gulf of Aqaba earthquake indicated that the event consists of three subevents with various fault geometries and about 60% of the moment released by the second subevent. The first subevent occurred at a depth of 13 km, and was followed after 9 s by the second one at a depth of 11 km; the third subevent, at a depth of 9 km occurred 19 s after the second one. The total duration of the earthqauke rupture process was about 18.7 s. The obtained mechanisms for the 1993 and 1995 Gulf of Aqaba earthquakes are well correlated with the structural setting of the Gulf of Aqaba.

Słowa kluczowe

EN

Gulf of Aqaba; waveform inversion; complex rupture; tectonics

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2006
• Tom: Vol. 54, no. 3
• Strony: 260--279

Twórcy

autor

Abdel-Fattah A.

autor

Hussein H.

autor

El-Hady S.

• National Research Institute of Astronomy and Geophysics Seismology Department, Helwan 11421, Cairo, Egypt,

Bibliografia

• Abdel-Fattah, A.K., H.M. Hussein, E.M. Ibrahim and A.S. Abu El Atta, 1997, Fault plane solutions of the 1993 and 1995 Gulf of Aqaba earthquakes and their tectonic implications, Annali di Geofisica, XL (6) 1555-1564.
• Ambraseys, N.N., and C.P. Melville, 1989, Evidence for intraplate earthquakes in northwest Arabia, Bull. Seismol. Soc. Am. 79, 1279-1281.
• Badawy, A., 1996, Seismicity and kinematic evolution of the Sinai plate, L. Eötvös University, Budapest, Ph.D. thesis, pp.115.
• Baer, G., D. Sandwell, Y. Williams, G. Bock and G. Shamir, 1999, Coseismic deformation associated with the November 1995, Mw = 7.1 Nuweiba earthquake, Gulf of Elat (Aqaba), detected by synthetic aperture radar interferometery, J. Geophys. Res. 104, 25221-25232.
• Ben-Avraham, Z., 1985, Structural framework of the Gulf of Elat (Aqaba), northern Red Sea, J. Geophys. Res. 90, 703-726.
• Boatwright, J., 1980, A spectral theory of circular seismic sources: simple estimates of source duration, dynamic stress drop and radiated energy, Bull. Seismol. Soc. Am. 70, 1-27.
• Brune, J.B., 1970, Tectonic stress and spectra of seismic shear waves from earthquakes, J. Geophys. Res. 75, 4997-5009.
• Brune, J.B., 1971, Correction, J. Geophys. Res. 76, 5002. Crespi, M., G. Pietrantonio and F. Riguzzi, 2000, Strain tensor estimation by GPS observations: software and applications, Boll. Geod. Sc. Aff. 3, 261-280.
• Dziewonski, A.M., G. Ekstrom and M.P. Salganik, 1997, Centroid moment tensor solutions for October-December 1995, Phys. Earth Planet. Inter. 101, 1-12.
• Eyal, Y., M. Eyal, Y. Bartov, G. Steinitz and Y. Folkman, 1986, The origin of the Bir Zreir rhomb-shaped graben, Eastern Sinai, Tectonics 5(2), 267-277.
• Futterman, W.I., 1962, Dispersive body waves, J. Geophys. Res. 67, 5279-5291.
• Garfunkel, Z., 1981, Internal structure of the Dead Sea leaky transform in relation to plate kinematics, Tectonophysics 80, 81-108.
• Garfunkel, Z., J. Barton, Y. Eyal and G. Steinitz, 1974, Raham conglomerate, new evidence for Neogene tectonism in the southern part of the Dead Sea rift, Geol. Mag. 111, 55-64.
• Gergawi, A., and H. El-Khashab, 1968, Seismicity of U.A.R., Helwan Observ. Bull. 76, pp. 27.
• Ginzburg, A., J. Makris, K. Fuchs, B. Perathoner and C. Prodehl, 1979, Detailed structure of the crust and upper mantle along the Jordan-Dead Sea rift, J. Geophys. Res. 84, B10, 5605-5612.
• Growell, J.C., 1974, Origin of Late Cenozoic basins in southern California. In: W.R. Dickinson (ed.), "Tectonics and Sedimentation", Soc. Econ. Palaeontol. Mineral. 19, 292-303.
• Ide, S., 2001, Complex source processes and the interaction of moderate earthquakes during the earthquake swarm in the Hida-Mountains, Japan, 1998, Tectonophysics 334, 35-54.
• Jeffreys, H., and K.E. Bullen, 1958, Seismological Tables, British Association Burlington House, London.
• Kanamori, H., and D.L. Anderson, 1975, Theoretical basis of some empirical relations in seismology, Bull. Seism. Soc. Am. 65, 1073-1095.
• Kebeasy, R., 1990, Seismicity. In: R. Said (ed.), "Geology of Egypt", Balkema, Rotterdam, 51-59.
• Kikuchi, M., and H. Kanamori, 1991, Inversion of complex body waves, III, Bull. Seism. Soc. Am. 81, 2335-2350.
• Klinger, Y., L. Rivera, H. Haessler and J. Maurin, 1999, Active faulting in the Gulf of Aqaba: New knowledge from the Mw 7.3 earthquake of 22 November 1995, Bull. Seism. Soc. Am. 89, 1025-1036.
• Klinger, Y., R. Michel and J-P. Avouac, 2000, Co-seismic deformation during the Mw 7.3 Aqaba earthquake(1995) from ERS-SAR interfermetry, Geophys. Res. Letters. 72, 3651-3654.
• Le Pichon, X., and J.M. Gaulier, 1988, The rotation of Arabia and the Levant fault system, Tectonophysics 153, 271-294.
• Lyberis, N., 1988, Tectonic evolution of the Gulf of Aqaba, Tectonophysics 153, 209-220.
• Maamoun, M., and E.M. Ibrahim, 1978, Tectonic activity in Egypt as indicated by earthquakes, Helwan Observ. Bull. 170, 20 pp.
• Malkawi, A.I., K.S. Numayr and S.A. Barakat, 1999, The Aqaba earthquake of November 22, 1995, Earthq. Spectra 15, 397-415.
• Marzouk, I., H. Hussein, A. Gharib and N. Hurukawa, 2001, The Gulf of Aqaba earthquake aftershock sequence. Proceedings of the 12th Symposium on Phanerozoic and Development, May 2001, Al-Azher Univ., Department of Geology, Cairo.
• Pinar, A., and N. Turkelli, 1997, Source inversion of the 1993 and 1995 Gulf of Aqaba earthquakes, Tectonophysics 293, 279-288.
• Reilinger, R.E., S.C. McClusky, M.B. Oral, R.W. King, M.N. Toksoz, A.A. Barka, I. Kinik, O. Lenk and I. Sanli, 1997, Global positioning system measurements of present-day crustal movements in the Arabian-Africa-Eurasia plate collision zone, J. Geophys. Res. 102, 9983-9999.
• Shamir, G., 1996, The November 22, 1995 Nuweiba earthquake, Gulf of Elat (Aqaba): mechanical analysis, Rep. 550/87/96 (114), Geophysical Institute of Israel, Holon.
• Steckler, M.S., F. Berthelot, N. Lyberis and X. Le Pichon, 1988, Subsidence in the Gulf of Suez: implications for rifting and plate kinematics, Tectonophysics 153, 249-270.
• Wilcox, R.E., T.P. Harding and D.R. Seely, 1973, Basic wrench tectonics, The American Association of Petrolum Geologist Bulletin 57, p. 7496.