Abstract
The records from 59 identical broadband seismic stations located in different regions of the world, made before and after the strong earthquake off Sumatra Island on December 26, 2004, with magnitude M = 9.1, are studied. Oscillations with periods of 40 to 360 s are analyzed. Stations located several hundred kilometers away from each other demonstrate different pulses of seismic noise with periods of 40–80, 80–160, and 160–320 s, which indicates that this effect is connected to local sources in the atmosphere. The exponential growth of the spectral amplitude of noise with elongation of the periods of oscillations corresponds to the theory by A.N. Kolmogorov about local isotropic turbulence in the atmosphere. The level of seismic noise increased twice after the Sumatra earthquake at stations located both in the seismoactive subduction zones and within the platforms.
Similar content being viewed by others
REFERECNES
T. Tanimoto, J. Um, K. Nishida, and N. Kobayashi, Geophys. Res. Lett. 25, 1553–1556 (1998).
G. Ekstrom, J. Geophys. Res. 106 (B11), 26483–26493 (2001).
K. Nishida, N. Kobayashi, and Y. Fukao, Geophys. Res. Lett. 29 (10), 52.1–52.4 (2002).
E. Wieland and G. Streckeisen, Bull. Seismol. Soc. Am. 72, 2349–2367 (1982).
A. P. Kulaichev, Methods and Means for Analyzing Information on Windows Environment. Stadia 6.0 (NPO Informatika i Komp’yutery, Moscow, 1996) [in Russian].
A. A. Lyubushin, Systems for Geophysical and Ecological Monitoring: Information Analysis (Nauka, Moscow, 2007) [in Russian].
G. A. Sobolev, Seismic Noise (Nauka i Obrazovanie, Moscow, 2014) [in Russian].
G. A. Sobolev, Dokl. Earth Sci. 472 (1), 87–90 (2017).
A. N. Kolmogorov, Dokl. Acad. Nauk SSSR 30 (4), 299–303 (1941).
A. S. Monin and A. M. Yaglom, Statistical Fluid Mechanics (Nauka, Moscow, 1965, 1967), Vols. 1, 2 [in Russian].
Turbulence, Dynamics of Atmosphere and Climate, Ed. by G. S. Golitsyn, I. I. Mokhov, S. N. Kulichkov, (GEOS, Moscow, 2014) [in Russian].
FUNDING
This work was supported by the Russian Foundation for Basic Research, project no. 18–05–00026.
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated by N. Astafiev
Rights and permissions
About this article
Cite this article
Sobolev, G.A. Low-Frequency Seismic Noise Before and After the Sumatra Megaearthquake of December 26, 2004. Dokl. Earth Sc. 485, 395–400 (2019). https://doi.org/10.1134/S1028334X1904007X
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1028334X1904007X