scholarly journals Infrasound signals from earthquakes of December 5, 2014 in the water area of lake Hovsgol, Northern Mongolia

2019 ◽  
Vol 484 (5) ◽  
pp. 610-614
Author(s):  
A. G. Sorokin ◽  
A. V. Klyuchevskii
Keyword(s):  
Water Area ◽  
Comprehensive Analysis ◽  
Signal Generation ◽  
Flexural Waves ◽  
Geophysical Observatory ◽  
Russian Academy Of Sciences ◽  
Lake Hovsgol ◽  
Northern Mongolia ◽  
Academy Of Sciences ◽  
Infrasonic Signal

A comprehensive analysis of waveforms of seismic and infrasonic vibrations from the earthquake that occurred on December 5, 2014, in the water area of Lake Hovsgol was performed. The analysis showed that the infrasonic signal recorded at the Tory station (Geophysical Observatory of the Institute of Solar-Terrestrial Physics, Russian Academy of Sciences) was formed by the sources of three generation types: local, secondary, and epicentral. The obtained results allow us to propose the model of epicentral infrasonic signal generation by flexural waves from an elastic ice membrane on the surface of Lake Hovsgol.

scholarly journals Generation of infrasonic signals during earthquakes under Lake Hovsgool (Northern Mongolia) on December 5, 2014

2018 ◽  
Vol 4 (4) ◽  
pp. 95-105
Author(s):  
Александр Сорокин ◽  
Aleksandr Sorokin ◽  
Анатолий Ключевский ◽  
Anatoliy Klyuchevskii ◽  
Владимир Демьянович ◽  
...  
Keyword(s):  
Seismic Wave ◽  
Initial Phase ◽  
Joint Analysis ◽  
Weak Signal ◽  
Flexural Waves ◽  
Small Magnitude ◽  
Infrasonic Waves ◽  
Northern Mongolia ◽  
The Moment ◽  
Infrasonic Signal

The paper discusses the results of the detection of seismic and infrasonic waves generated by a major earthquake and its aftershock (the moment magnitude MW=4.9 and MW=4.2 respectively), which occurred in northern Mongolia under Lake Hovsgool on December 5, 2014. The joint analysis of waveforms of seismic and infrasonic oscillations has shown that the signal recorded by the infrasound station of the Geophysical Observatory of the Institute of Solar-Terrestrial Physics SB RAS (ISTP SB RAS) is formed from sources of three generation types: local, secondary, and epicentral. This analysis enables us to propose a hypothesis of generation of epicentral infrasonic signal by flexural waves in an elastic ice membrane on the surface of Lake Hovsgool, which appear during the passage of seismic wave packets. This hypothesis explains the similarity between seismic and epicentral infrasonic signals, negative initial phase of epicentral infrasonic waves, and detection of a weak signal after a small-magnitude aftershock.

scholarly journals Generation of infrasonic signals during earthquakes under Lake Hovsgool (Northern Mongolia) on December 5, 2014

2018 ◽  
Vol 4 (4) ◽  
pp. 73-81 ◽  
Author(s):  
Александр Сорокин ◽  
Aleksandr Sorokin ◽  
Анатолий Ключевский ◽  
Anatoliy Klyuchevskii ◽  
Владимир Демьянович ◽  
...  
Keyword(s):  
Seismic Wave ◽  
Initial Phase ◽  
Joint Analysis ◽  
Weak Signal ◽  
Flexural Waves ◽  
Small Magnitude ◽  
Infrasonic Waves ◽  
Northern Mongolia ◽  
The Moment ◽  
Infrasonic Signal

The paper discusses the results of the detection of seismic and infrasonic waves generated by a major earthquake and its aftershock (the moment magnitude MW=4.9 and MW=4.2 respectively), which occurred in northern Mongolia under Lake Hovsgool on December 5, 2014. The joint analysis of waveforms of seismic and infrasonic oscillations has shown that the signal recorded by the infrasound station of the Geophysical Observatory of the Institute of Solar-Terrestrial Physics SB RAS (ISTP SB RAS) is formed from sources of three generation types: local, secondary, and epicentral. This analysis enables us to propose a hypothesis of generation of epicentral infrasonic signal by flexural waves in an elastic ice membrane on the surface of Lake Hovsgool, which appear during the passage of seismic wave packets. This hypothesis explains the similarity between seismic and epicentral infrasonic signals, negative initial phase of epicentral infrasonic waves, and detection of a weak signal after a small-magnitude aftershock.

Infrasonic Signals from Earthquakes of December 5, 2014, in the Water Area of Lake Hovsgol, Northern Mongolia

2019 ◽  
Vol 484 (2) ◽  
pp. 198-202 ◽  
Author(s):  
A. G. Sorokin ◽  
A. V. Klyuchevskii
Keyword(s):  
Water Area ◽  
Lake Hovsgol ◽  
Northern Mongolia

Problems of Science and Its Effectiveness

2011 ◽  
pp. 151-157 ◽  
Author(s):  
A. Varshavsky
Keyword(s):  
Higher Education ◽  
Public Management ◽  
External Factors ◽  
Education Sector ◽  
Russian Science ◽  
Russian Academy Of Sciences ◽  
Scientific Results ◽  
Academy Of Sciences ◽  
Academic Sector

The article considers current problems of Russia´s science. Special attention is paid to external factors that negatively influence its effectiveness including considerable lag in public management sector. The issues of opposing higher education sector to the Russian Academy of Sciences (RAS) are also discussed. A number of indicators of the Russian science and its academic sector effectiveness are presented. The expediency of comparing scientific results with R&D expenditures is shown. The problems connected with using bibliometric methods are discussed. Special attention is paid to the necessity of preserving and further developing Russian science including RAS.

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