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6Long-period seismogravitation processes: Analytical analysis
A. L. Sobisevich1, L. E. Sobisevich1, A. G. Fatyanov2, A. V. Razin1
1Institute of Physics of the Earth RAS
2Institute of Computational Mathematics and Mathematical Geophysics SB RAS
Email: fat@nmsf.sscc.ru
DOI 10.24412/cl-35065-2021-1-01-14
Recently, a previously unknown experimental fact has been recorded. In the period of formation of focal
structures of large seismic events and the moment of the onset of an earthquake (main shock), modern obser-
vatory information-measuring systems record an �instantaneous� long-period seismic gravity disturbance.
Moreover, it appears earlier than the P-wave at the observation point [1]. It is known that for classical elastic
media there can be no signal before longitudinal P-waves. A number of French and American authors explain
this paradox by the appearance of gravitational waves propagating with a speed close to the speed of light [1].
Other researchers believe that the physics of the explanation of the seismic-gravitational process proposed
in [1] is insufficiently substantiated [2].
A new analytical solution of the Klein-Gordon equation is obtained. The analytical solution showed that in
the low-frequency region there is a wave process of two terms. One of them is an �instantaneous� long-period
seismic-gravity disturbance. The second is the formed seismic gravity wave P. Thus, the origin of the long-
period seism gravity process in the first approximation can be made using the classical Klein � Gordon equa-
tion [3]. The analytical modeling results show good agreement with field observations.
References
1. Vallee M., Ampuero J.P., Juhel K., Bernard P., Montagner J.-P., Barsuglia M. Science J.. 2017. V. 358. P. 1164�1168.
2. Kimura M, Kame N, Watada S, Ohtani M, Araya A, Imanishi Y, Ando M, Kunugi T (2019). Planets Space
71:27. https://doi.org/10.1186/s40623-019-1006-x.
3. Sobisevich L.E., Sobisevich A.L., Fatyanov A.G. Long-period seismic-gravity processes in the lithosphere (in
Russian). M.: IFZ RAS, 2020, 228 p.
Development of a hybrid parallelization scheme for the numerical solution of the mesoscale meteorological
TSUNM3 model equations
A. V. Starchenko1,2, E. A. Danilkin1,2, D. V. Leshchinskiy1,2
1Tomsk State University
2V. E. Zuev Institute of Atmospheric Optics SB RAS
Email: ugin@math.tsu.ru
DOI 10.24412/cl-35065-2021-1-01-83
The paper considers a hybrid parallel algorithm for the numerical solution of the forecast meteorological
mesoscale TSUNM3 model equations [1]. The TSUNM3 model predicts the components of wind velocity and
characteristics of temperature and humidity in the atmospheric boundary layer at 50 vertical levels
(up to 10 km) for an area of 200.200 km with a nested area of 50.50 km (grid step is 1 km with the center in
the Tomsk city). The initialization of the model is carried out according to the results of a numerical forecast
based on the SL-AV operational global model of the Hydrometeorological Center of the Russian Federation [2].
The hybrid algorithm is built as a combination of two parallel programming technologies MPI and
OpenMP. The MPI message passing library is used for communication between the computational nodes of
the cluster, and the parallelization within one computational node is performed using the OpenMP library for
working with the shared memory.
The work was supported by the Russian Science Foundation (project no. 19-71-20042).
References
1. Starchenko A.V., Bart A.A., Kizhner L.I., Danilkin E.A. Mesoscale meteorological model tsunm3 for the study and
forecast of meteorological parameters of the atmospheric surface layer overa major population center // Tomsk State
University J. of Mathematics and Mechanics. 2020. V. 66. P. 35�55.
2. Tolstykh M.A., Fadeev R.Yu., Shashkin V.V., Goyman G.S., Zaripov R.B., Kiktev D.B., Makhnorylova S.V., Mizyak
V.G., Rogutov V.S. Multiscale Global Atmosphere Model SL-AV: the Results of Medium-range Weather Forecasts Russ //
Meteorol.Hydrol. 2018. V. 43. P. 773�779.
M. V. Keldysh: The Lord of numbers and the formation of applied mathematics. To the 110th anniversary
of the birth of M. V. Keldysh in the Year of science and technology
T. A. Sushkevich
Keldysh Institute of Applied Mathematics of Russian Academy of Sciences, Moscow
Email: tamaras@keldysh.ru
DOI 10.24412/cl-35065-2021-1-02-99
In the Year of science and technology in Russia, it is important to remember those who laid the fundamen-
tal basics of modern civilization. Three Russian GENIUS of worldwide recognition: XVIII century � 310 years
since the birth of M. V. Lomonosov (08.11.1701-04.04.1765); XIX century � 200 years since the birth of
P. L. Chebyshev (14.05.1821-26.11.1894); XX century � 110 years since the birth of M. V. Keldysh (02.10.1911-
24.06.1978) � "Lomonosov of XX century". No one has ever done so much for fundamental and applied science
and scientific-technological progress of XX and XXI centuries as Mstislav Vsevolodovich Keldysh. After the elec-
tions to academicians in 1946, M. V. Keldysh was responsible for "applied mathematics", and since 1951, as
the Chief Mathematician, he was responsible for calculations and computers in strategic projects: "Atomic",
"Space", "Nuclear missile shield". As President of the Academy of Sciences of USSR, M.V.Keldysh launched sci-
ence on a broad front in all areas of knowledge. This is the only scientist named after the "Keldysh Epoch":
during his lifetime he realized his "formulas and numbers" in projects for the conquest of aviation, atom, space
and the invention of computers, launched the FIRST SPUTNIK and a spacecraft with the FIRST man into space,
created manned astronautics, AMS flights to the Moon, Mars, Venus, laid the foundations of modern "infor-
matics" and "digitalization", founded the World's First Institute of Applied Mathematics. The only mathemati-
cian � legend � Three Times Hero of Socialist Labor (1956, 1961, 1971).
This research was supported by Task 0017-2019-0002 of KIAM RAS.
"Earth Future": Radiation field � a immaterial component of climate system, space research and applied
mathematics. To the 60th anniversary of cosmic flights of Yu. Gagarin and G. Titov in Year of science
and technology
T. A. Sushkevich, S. A. Strelkov, S. V. Maksakova
Keldysh Institute of Applied Mathematics of Russian Academy of Sciences, Moscow
Email: tamaras@keldysh.ru
DOI 10.24412/cl-35065-2021-1-02-98
The twenty-first year of the twenty-first century (2021) is the year of the 60th anniversary of the FIRST
space flights of earthlings. The era of the conquest of space by man and the greatness of the Soviet people, the
unique mobilization of intelligence and skill has come! 12.04.1961 FIRST cosmonaut Yu.Gagarin saw the Earth
from space for the first time � "Blue! Beauty!". 06.08.1961 SECOND cosmonaut G.Titov made the FIRST photo-
graphs and films of the Earth from space, which were used to verify models of the Earth's radiation field. The
