Physical Oceanography, Vol.
5, January, 2012 (Ukrainian Original No.
5, September–October, 2011)
THERMOHYDRODYNAMICS OF THE OCEAN
NUMERICAL ANALYSIS OF THE PROPAGATION AND AMPLIFICATION OF TSUNAMI
WAVES OF SEISMIC GENERATION IN THE SEA OF AZOV
S. F. Dotsenko
and A. V. Ingerov
The numerical analysis of the evolution of tsunamis is performed for the Sea of Azov. Our calculations
are carried out on a grid with steps of 500
m, as applied to seaquakes with magnitudes within the range
6–7 for 18 circular zones of generation covering almost the entire water area of the sea. It is shown that
the oscillations of the sea level in the form of cellular waves are formed as a result of the wave reflec-
tions from the coasts. Small areas of the elevated activity of waves are formed in the zones of irregular-
ity of the coastline on the north coast of the sea and in the zones of shoals in the southeast part of the ba-
sin. On the basis of the determined values of extreme elevations and lowerings of the sea level, we can
make a conclusion that the tsunami hazard is quite low for the coast of the Sea of Azov.
Keywords: Sea of Azov, tsunami, equations of long waves, numerical modeling, amplitude characteris-
tics of waves.
Tsunamis of seismic origin in the Sea of Azov are studied quite poorly . To a significant degree, this can
be explained by the weak seismicity of this region. The epicenters of historical relatively weak seaquakes are
concentrated in its south and southwest parts . The strongest seaquakes were recorded in 1978 and 1990 in
the north and south parts of the sea. The depths of the seismic sources of these seaquakes were close to 33 km,
and their magnitudes did not exceed 4.5.
At the same time, the Azov–Black-Sea region is a zone of high cyclonic activity of the atmosphere, which
does not enable us to exclude the possibility of generation of strong meteorological tsunamis in this region lead-
ing to floods in the coastal areas and strong oscillations of the sea level near the coast. In any case, the wind
fields may lead to significant (3–5 m) elevations and lowerings of level of the Sea of Azov in the coastal zone
for some directions and durations of the wind, which is confirmed by the results of numerical simulations [3, 4].
At the same time, the problem of efficiency of tsunami generation in the Sea of Azov by seismic sources re-
mains quite urgent but still insufficiently investigated . The numerical simulation of the process of propaga-
tion of tsunami-type waves caused by the initial displacements of the free surface in the Sea of Azov was carried
out by the finite-element method in .
In the present work, we describe the results of numerical simulation of the regularities of propagation of
tsunami waves in the Sea of Azov and their heights along the sea coast. For various magnitudes of seismic
sources, we study the process of propagation of tsunami waves from several hypothetical circular focuses of
generation, covering almost the entire water area of the Sea of Azov.
Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol, Ukraine.
Corresponding author; e-mail: email@example.com.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
3–13, September–October, 2011. Original article submitted May 18, 2010.
0928–5105/12/2105–0295 © 2012 Springer Science+Business Media, Inc. 295