Journal of Seismology

, Volume 6, Issue 4, pp 459–467 | Cite as

Seismicity and water level variations in the Lake Aswan area in Egypt 1982–1997

  • Awad Hassoup
Article

Abstract

The data described here are obtained from the continuous record of earthquakeactivity and lake water-level variation in the Lake Aswan area in Egypt between 1982 and 1997. The seismicity is monitored by a local telemetered seismograph network. The hypocentral parameters of earthquakes have been determined using Hypo71. The earthquake foci are distributed in two seismic zones, shallow and deep in the crust. Shallow events have focal depths of less than 10 km. Deep events extend from 10 to 30 km. The temporal sequence of seismicity iscorrelated with both the water-level variation and the average daily change of the water level in the lake Aswan. The temporal variation of the seismicityindicates that there are only six sequences of increased seismic activity during 1982–1997. The correlation between the seismic activity and the daily variation of the lake water level is poorly observed except with the June 1987 events swarm, which was accompanied by the presence of an anomaly in rate of water level decreasing. It is concluded that the increase in seismic activity in the Aswan reservoir is demonstrating an example of rapid reservoir-triggered seismicity. The deeper seismic sequence in this area, which was associated with the November 14, 1981 mainshock (MD = 5.7), and the earlier seismicity (1981–82), has been correlated with a deeper high velocity anomaly (Awad and Mizoue, 1995-b).

Lake Aswan seismicity water-level variation 

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References

  1. Awad, H., 1994, Investigation of the tectonic setting, seismic activity and crustal deformation in Aswan seismic region, Egypt, D.Sc. Thesis, Tokyo Univ.Google Scholar
  2. Awad, H., 2001, Microearthquake distribution in the Lake Aswan area, Egypt. Under publication in ACTA.Google Scholar
  3. Awad, H. and Mizoue, M., 1995-a, Earthquake activity in the Aswan region, Egypt, PAGEOPH 145(1), 69-86.Google Scholar
  4. Awad, H. and Mizoue, M., 1995-b, Tomographic inversion for the three-dimensional structure of the Aswan region, Egypt, PAGEOPH 145(1), 193-207.Google Scholar
  5. El-Shazly, E.M., 1977, The Geology of the Egyptian Region, The Ocean Basin and Margins, 4A, Plenum publishing cooperation, pp. 379-444.Google Scholar
  6. Evans, K., Beavan, J., Simpson, D. and Mousa, S., 1991, Estimating aquifer parameters from analysis of forced fluctuation in well level: an example from the Nubian formation near Aswan, Egypt, J. Geophys. Res. 96(B7), 12,127-12,189.Google Scholar
  7. Gupta, H.K., 1983, Induced seismicity hazard mitigation through water-level manipulation at Koyna, India, A suggestion, Bull. Seismo. Soc. Am. 73, 679-682.Google Scholar
  8. Gupta, H.K., 1992, Artificial water reservoirs and earthquakes: A world-wide status, In: Knoll, P. (ed.), Induced Seismicity, General Institute for Physics of the Earth, Potsdam, pp. 267-274.Google Scholar
  9. Gupta, H.K. and Rastogi, B.K., 1976, Dams and Earthquakes, Elsevier, Amsterdam, 229 pp.Google Scholar
  10. Gutenberg, B. and Richer, C.F., 1956, Magnitude and energy of earthquakes, Ann. Geofis. 9, 1-15.Google Scholar
  11. Hassib, G.H., 1999, A Study of Focal Mechanism for Recent Earthquakes in Egypt and their Tectonic Implication, M.Sc. thesis, Assuit Univ.Google Scholar
  12. Issawi, B., 1978, Geology of Nubia West Area, Western Desert, Annals of the Geological Survey of Egypt.Google Scholar
  13. Issawi, B., 1982, Geology of the Southwestern Desert of Egypt, Annals of the Geological Survey of Egypt.Google Scholar
  14. Kebeasy. R.M., Maamon, M. and Ibrahim, E.M., 1982, Aswan Lake induced Earthquake, Bull. International Institute of Seismology and Earthquake Engineering, Tsukuba, 19.Google Scholar
  15. Kebeasy, R.M., Bayoumi, A.I. and Gharib, A.A., 1992, Crustal structure modeling for the northern part of the Aswan Lake area using seismic waves generated by explosions and local earthquakes, J. Geodynamics 14, 1-24.Google Scholar
  16. Lee, W., 1982, Microearthquake Networks, Academic Press, New York.Google Scholar
  17. Lee, W., 1990, Hypo71pc program. IAESPI software library vol. 1.Google Scholar
  18. Scholz, C.H., 1990, The Mechanics of Earthquakes and Faulting, Cambridge Univ., New York.Google Scholar
  19. Simpson, D.W., 1976, Seismicity changes associated with reservoir loading, Eng. Geol. 10, 123-150.Google Scholar
  20. Simpson, D.W., Kebeasy, R.M., Nicholson, C., Maamoun, M., Albert, R.N.H., Ibrahim, E.M., Gharib, A. and Hussein, A., 1987, Aswan telemetered seismograph network, J. Geodynamics. 7, 195-203.Google Scholar
  21. Simpson, D.W., Leith, W.S. and Scholz, C.H., 1988, Two types of induced seismicity, Bull. Seismo. Soc. Am. 78, 2024-2040.Google Scholar
  22. Simposn, D.W. and Narasimhan, 1992, Inhomogeneities in rock properties and their influence on reservoir induced seismicity, In: Knoll, P. (ed.), Induced Seismicity, General Institute for Physics of the Earth, Potsdam, pp. 345-358.Google Scholar
  23. Snow, D.T., 1972, Geodynamics of Seismic Reservoirs, Proc. Symp. Percolation through Fissured rock, Stuttgart: Ges. Erd-Und Grundhau, T2J: pp. 1-19.Google Scholar

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Awad Hassoup
    • 1
  1. 1.National Research Institute of Astronomy and Geophysics, HelwanCairoEgypt

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