THE RATIO BETWEEN THE POINTS OF THE DIFFERENT SEISMIC INTENSITY SCALES
F.F. Aptikaev1, O.O. Erteleva1, G.M. Tokmulina2
1.Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia
2. Sklifosovsky Clinical Medicine Institute, Moscow, Russia
Corresponding author: F.F. Aptikaev, e-mail: felix@ifz.ru
Abstract. The seismic intensity scale is one of the oldest instruments for determining seismic vibrations extent. Being initially a descriptive characteristic of the seismic effect, intensity has long required only more detailed, thorough consideration and recording of the consequences and manifestations of various primary and secondary effects in earthquakes to increase its accuracy. The indicators were changes in the natural environment, the reaction of humans and animals, as well as the results of the effects of seismic events on various engineering structures. Obviously, the last of the research objects listed in this series have the most variable characteristics over time. The emergence of new building structures and materials had to be reflected in the seismic intensity scales. The latter is encouraging changes in the scales used and the development of new scales. At the same time, there is a problem of the ratio of the earthquake intensity estimates over different seismic intensity scales. The article considers the problem of quantitative assessment of differences in intensity determination according to MCS, MM, MSK-64, EMS-98 scales, as well as two new national standards of Russia GOST R 57546–2017 and GOST 34511-2018. Comparison is carried out according to macroseismic and instrumental parts of scales separately. Analysis of macroseismic descriptions of individual points (gradations) is carried out using objects-indicators people, objects, buildings and structures, natural phenomena. Each indicator is considered separately. For scales MCS, MM, MSK-64, GOST R 57546–2017 and GOST 34511-2018 their instrumental parts were compared. Based on the studies carried out, it was concluded that the macroseismic parts of these scales coincide with the exception of low estimates of the dimensions of cracks in the soils in the MSK-64 scale. Average differences in the descriptions of damage to buildings and structures do not exceed 0.1 points. The significant differences exist in the instrumental parts of MM, MSK-64 and GOST R 57546–2017.
Keywords: seismic scale, intensity, point, scale degree, peak ground acceleration
About the authors
APTIKAEV Felix Fuadovich – Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10-1. E-mail: felix@ifz.ru
ERTELEVA Olga Olegovna – Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10-1. E-mail: ertel@ifz.ru
TOKMULINA Galia Malikovna – Sklifosovsky Clinical Medicine Institute of Sechenov First Moscow State Medical University (Sechenov University). Russia, 121059, Moscow, ul. Mozhayskiy Val, 11. E-mail: tokmulinagalia@mail.ru
Cite this article as: Aptikaev F.F., Erteleva O.O., Tokmulina G.M. The ratio between the points of the different seismic intensity scales, Voprosy Inzhenernoi Seismologii (Problems of Engineering Seismology). 2020. V. 47, No. 3. P. 75–91. [in Russian]. https://doi.org/10.21455/VIS2020.3-4
English translation of the article will be published in Seismic Instruments, ISSN: 0747-9239 (Print) 1934-7871 (Online), https://link.springer.com/journal/11990