Practical Earthquake Location on a Continental Scale in Australia Using the AuSREM 3D Velocity Model

被引:11
|
作者
de Kool, M. [1 ]
Kennett, B. L. N. [2 ]
机构
[1] Geosci Australia, Canberra, ACT 2601, Australia
[2] Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia
关键词
SEISMOLOGICAL REFERENCE MODEL; NEIGHBORHOOD ALGORITHM; TRAVEL-TIMES; INVERSION; COMPONENT; MOHO;
D O I
10.1785/0120140105
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
This study explores the full 3D earthquake location for the Australian continent, exploiting the recent 3D Australian Seismological Reference Model (AuSREM). Seismic velocities from AuSREM were used as input to precompute finely spaced P- and S-travel-time grids for each station in the Australian National Seismograph Network using the multistage fast marching method. Travel times from anywhere in the grid to the corresponding station can then be computed by interpolation. The location search using these travel times is based on matching observed and computed arrival times using the neighborhood algorithm. All computations involved can be performed in practical time frames on a single processor computer. The performance of the 3D approach relative to location using the 1D global ak135 velocity model was assessed by locating a set of recent earthquakes. The arrival-time residuals for P and S arrivals are significantly smaller when using the 3D AuSREM model. The improvements over ak135 are especially large in the 10 degrees-18 degrees distance range, in which a distance bias is strongly reduced and for those paths where the ak135 residuals are large. A small set of six ground-truth events was used to assess to what extent the reduction in travel-time residuals leads to better absolute location accuracy. The 3D location offset from the ground-truth position is typically half that of the ak135 offset. The patterns of offsets suggest that the already fast mantle wavespeeds in western Australia need to be even faster than in AuSREM.
引用
收藏
页码:2755 / 2767
页数:13
相关论文
共 50 条
  • [11] GrowClust3D.jl: A Julia Package for the Relative Relocation of Earthquake Hypocenters Using 3D Velocity Models
    Trugman, Daniel T.
    Chamberlain, Calum J.
    Savvaidis, Alexandros
    Lomax, Anthony
    SEISMOLOGICAL RESEARCH LETTERS, 2023, 94 (01) : 443 - 456
  • [12] Using 3D robust smoothing to fill land surface temperature gaps at the continental scale
    Pham, Hung T.
    Kim, Seokhyeon
    Marshall, Lucy
    Johnson, Fiona
    INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION, 2019, 82
  • [13] New 3D Velocity Model (mTAB3D) for Absolute Hypocenter Location in Southern Iberia and the Westernmost Mediterranean
    Sanchez-Roldan, Jose Luis
    Alvarez-Gomez, Jose A.
    Martinez-Diaz, Jose J.
    Herrero-Barbero, Paula
    Perea, Hector
    Cantavella, Juan V.
    Lozano, Lucia
    EARTH AND SPACE SCIENCE, 2024, 11 (10)
  • [14] 3D Location Estimation in Urban Cellular Systems Using the Overhearing Model
    Ghaboosi, Nejla
    Jamalipour, Abbas
    2011 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC), 2011,
  • [15] Continental-scale mapping and analysis of 3D building structure
    Li, Mengmeng
    Koks, Elco
    Taubenboeck, Hannes
    van Vliet, Jasper
    REMOTE SENSING OF ENVIRONMENT, 2020, 245
  • [16] 3d seismic velocity structure imaging beneath Flores region using local earthquake tomography
    Maneno, R.
    Santosa, B. J.
    INTERNATIONAL CONFERENCE ON MATHEMATICS AND NATURAL SCIENCES (ICMNS), 2019, 1245
  • [17] Relocation of Seismicity in the Pannonian Basin Using a Global 3D Velocity Model
    Bondar, Istvan
    Monus, Peter
    Czanik, Csenge
    Kiszely, Marta
    Graczer, Zoltan
    Weber, Zoltan
    SEISMOLOGICAL RESEARCH LETTERS, 2018, 89 (06) : 2284 - 2293
  • [18] Earthquake relocation using a 3D a-priori geological velocity model from the western Alps to Corsica: Implication for seismic hazard
    Bethoux, Nicole
    Theunissen, Thomas
    Beslier, Marie-Odile
    Font, Yvonne
    Thouvenot, Francois
    Dessa, Jean-Xavier
    Simon, Soazig
    Courrioux, Gabriel
    Guillen, Antonio
    TECTONOPHYSICS, 2016, 670 : 82 - 100
  • [19] An integrated multi-scale 3D seismic model of the Archaean Yilgarn Craton, Australia
    Goleby, BR
    Blewett, RS
    Fomin, T
    Fishwick, S
    Reading, AM
    Henson, PA
    Kennett, BLN
    Champion, DC
    Jones, L
    Drummond, BJ
    Nicoll, M
    TECTONOPHYSICS, 2006, 420 (1-2) : 75 - 90
  • [20] Estimating the location of a camera with respect to a 3D model
    Yang, Gehua
    Becker, Jacob
    Stewart, Charles V.
    3DIM 2007: SIXTH INTERNATIONAL CONFERENCE ON 3-D DIGITAL IMAGING AND MODELING, PROCEEDINGS, 2007, : 159 - +