Description

• Title:
  Frequency magnitude distribution and spatial correlation dimension of earthquakes in north-east Himalaya and adjacent regions
• Creator:
  Tiwari, Ram Krishna;
  Paudyal, Harihar
• Description:
  The north-east sector of the Himalaya is one of the most active tectonic belts, with complex geological and tectonic features. The b-value and spatial correlation dimension (Dc) of earthquake distribution in the north-east Himalaya and its adjacent regions (20–32°N and 88–98°E) are estimated in the present study. Based on seismicity and faulting pattern, the region is divided into five active regions, namely the (i) South-Tibet, (ii) Eastern-Syntaxis, (iii) Himalayan-Frontal Arc, (iv) Arakan-Yoma belt and (v) Shillong-Plateau. A homogeneous catalogue of 1,416 earthquakes (mb ≥ 4.5) has been prepared from a revised catalogue of the ISC (International Seismological Centre). The b-value has been appraised by the maximum likelihood estimation method, while Dc values have been calculated by the correlation integral method; b-values of 1.08 ± 0.09, 1.13 ± 0.05, 0.92 ± 0.05, 1.00 ± 0.03 and 0.98 ± 0.08 have been computed for the South-Tibet, Eastern-Syntaxis, Himalayan-Frontal Arc, Arakan-Yoma belt and Shillong-Plateau region, respectively. The Dc values computed for the respective regions are 1.36 ± 0.02, 1.74 ± 0.04, 1.57 ± 0.01, 1.8 ± 0.01, and 1.83 ± 0.02. These values are > 1.5, except for the South-Tibet (1.36 ± 0.02). The b-values around the global average value (1.0) reflect the stress level and seismic activity of the regions, while high Dc values refer to the heterogeneity of the seismogenic sources.
• Object availability:
  free access
• Rights:
  Prawa autorskie (c) 2022 Ram Krishna Tiwari, Harihar Paudyal;
  https://creativecommons.org/licenses/by-nc-nd/3.0
• Date:
  2022.08.31
• Type:
  info:eu-repo/semantics/article;
  info:eu-repo/semantics/publishedVersion;
  Research papers
• Language:
  English;
  eng
• Source:
  Geologos; Vol. 28 No. 2 (2022): ; 115-128;
  Geologos; Tom 28 Nr 2 (2022): ; 115-128;
  2080-6574;
  1426-8981
• Format:
  application/pdf
• Publisher:
  Adam Mickiewicz University Poznan
• Relation: http://pressto.amu.edu.pl/index.php/logos/article/view/35608/31820
• Subject:
  North-east India;
  b-value;
  maximum likelihood estimation;
  correlation dimension
• Identifier: http://pressto.amu.edu.pl/index.php/logos/article/view/35608
• Data provider:
  Platforma Otwartych Czasopism Naukowych UAM
• Can I use it?:
  seek permission
• Type:
  other