Some results of data processing for the earthquakes occurring in Dien Bien Dong district, Dien Bien province, Vietnam in the period from January to February, 2018

http://jmes.humg.edu.vn/en/archives?article=1034
  • Affiliations:

    1 Viện Vật lý địa cầu, Viện Hàn lâm Khoa học và Công nghệ Việt Nam, Việt Nam;
    2 Quỹ Phát triển Khoa học và Công nghệ Quốc gia, Bộ Khoa học và Công nghệ, Việt Nam;
    3 Khoa Khoa học và Kỹ thuật Địa chất, Trường Đại học Mỏ - Địa chất, Việt Nam;
    4 Viện Địa chất, Viện Hàn lâm Khoa học và Công nghệ Việt Nam, Việt Nam;
    5 Học viện Khoa học và Công nghệ, Viện Hàn lâm Khoa học và Công nghệ Việt Nam, Việt Nam

  • *Corresponding:
    This email address is being protected from spambots. You need JavaScript enabled to view it.
  • Received: 11st-Aug-2019
  • Revised: 6th-Sept-2019
  • Accepted: 31st-Oct-2019
  • Online: 31st-Oct-2019
Views: 1450
Downloads: 743
Rating: 5.0, Total rating: 74
Yours rating

Abstract:

In this paper, we analyze a sequence of small to moderate magnitude (ML = 1,2÷4,3) earthquakes occurred during January - February, 2018 in the Dien Bien Dong district, Dien Bien province, northwest region of Vietnam. The events are recored by broadband seismic stations that provide high quality data for hypocenter locations and focal - mechanism solutions. The routine locations of the earthquakes show that the epicentres fall close to the intersection between northwest - southeast trending Chieng Khuong fault and the semi - longitudinal fault system. The Double Difference (DD) method intergrated in HypoDD program (Waldhauser and Ellsworth, 2000) is applied to relocate three bigger events (ML = 4,3; 4,1 and 3,8). The relocations show that their epicenters moved to the southeast of the Chieng Khuong fault. Focal mechanism solutions are determined by the Moment tensor inversion method (Herrmann et al, 2011). The mechanisms of the three events show primarily strike - slip with normal faulting. The P - axis trends approximately northwest - southest. The geological investigations reveals that the Chieng Khuong fault is a right - leteral strike - slip fault (N216 - 2310) and dipping at 53o - 73 o southwest, which is conformable to the focal mechanism solutions. These results comfirm that the current seimic network in the Northwest region of Vietnam can ability obserb all M > 3,5 earthquakes with high accuracy of location, that could be use to study the morphology and mechanism of the faults that generating the earthquakes.

How to Cite
Dinh, V.Quoc, Ngo, T.Xuan, Nguyen, M.Le, Ha, G.Thi, Van, T.Duc, Nguyen, D.Van and Pham, N.Dinh 2019. Some results of data processing for the earthquakes occurring in Dien Bien Dong district, Dien Bien province, Vietnam in the period from January to February, 2018 (in Vietnamese). Journal of Mining and Earth Sciences. 60, 5 (Oct, 2019).

Other articles