Journal cover Journal topic
Solid Earth An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 2.380 IF 2.380
  • IF 5-year value: 3.147 IF 5-year
    3.147
  • CiteScore value: 3.06 CiteScore
    3.06
  • SNIP value: 1.335 SNIP 1.335
  • IPP value: 2.81 IPP 2.81
  • SJR value: 0.779 SJR 0.779
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 32 Scimago H
    index 32
  • h5-index value: 31 h5-index 31
Discussion papers
https://doi.org/10.5194/se-2019-29
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-2019-29
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 11 Feb 2019

Research article | 11 Feb 2019

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Solid Earth (SE).

Improving quality of empirical Greens functions, obtained by cross-correlation of high-frequency ambient seismic noise

Nikita Afonin1,4, Elena Kozlovskaya1,2, Jouni Nevalainen1,3, and Janne Narkilahti3 Nikita Afonin et al.
  • 1Oulu Mining School, POB-3000, FIN-90014, University of Oulu, Finland
  • 2Geological Survey of Finland, P.O. Box 96, FI-02151, Espoo, Finland
  • 3Sodankylä Geophysical Observatory POB 3000, FIN-90014, University of Oulu, Finland
  • 4N. Laverov Federal Centre for the Integrated Arctic Research RAS, Arkhangelsk, Russia

Abstract. Studying the uppermost structure of the subsurface is a necessary part for solving many practical problems (exploration of minerals, groundwater studies, geoengineering, etc.). Practical application of active seismic methods is not always possible because of different reasons, such as logistical difficulties, high cost of work, high level of seismic and acoustic noise, etc. That is why developing and improving of passive seismic methods for these purposes is one of the important problems in applied geophysics. In our study, we describe the way of improving quality of Empirical Green’s Functions (EGFs), evaluated from high-frequency ambient seismic noise, by using of advanced technique of cross-correlation functions stacking in the time domain (in this paper we use term “high-frequency” for the frequencies higher than 1 Hz). In compare to existing techniques, based on weight-stacking, our proposed technique makes it possible to more significantly increase the signal-to-noise ratio and, therefore quality of the EGF. The technique is based on both iterative and global optimization algorithms, where the optimized parameter is a signal-to-noise ratio of an EGF, retrieved for each iteration. The technique has been tested with the field data acquired in an area with high level of industrial noise (Pyhäsalmi Mine, Finland) and in an area with low level of anthropogenic noise (Kuusamo Greenstone Belt, Finland). The results show that the our proposed technique can be used for extraction of EGFs from high-frequency seismic noise in practical problems of mapping of the shallow subsurface in areas with high and low level of high-frequency seismic noise.

Nikita Afonin et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Login for Authors/Topical Editors] [Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Nikita Afonin et al.
Nikita Afonin et al.
Viewed  
Total article views: 343 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
248 93 2 343 2 1
  • HTML: 248
  • PDF: 93
  • XML: 2
  • Total: 343
  • BibTeX: 2
  • EndNote: 1
Views and downloads (calculated since 11 Feb 2019)
Cumulative views and downloads (calculated since 11 Feb 2019)
Viewed (geographical distribution)  
Total article views: 186 (including HTML, PDF, and XML) Thereof 186 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
Latest update: 26 Jun 2019
Publications Copernicus
Download
Citation