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4Plenary session
Long.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 observatory
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 equation
[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 numericalsolution 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 modelequations [1]. The TSUNM3 modelpredicts 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). Theinitialization of the model is carried out according to the results of a numerical forecast
based on the SL.AV operational global modelof 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.
