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
  • [31] Improved Regional and Teleseismic P-Wave Travel-Time Prediction and Event Location Using a Global 3D Velocity Model
    Myers, Stephen C.
    Simmons, Nathan A.
    Johannesson, Gardar
    Matzel, Eric
    BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA, 2015, 105 (03) : 1642 - 1660
  • [32] 3D DATA-DOMAIN REFLECTION TOMOGRAPHY FOR INITIAL VELOCITY MODEL BUILDING USING CHALLENGING 3D SEISMIC DATA
    Bakulin, A.
    Silvestrov, I
    Neklyudov, D.
    Gadylshin, K.
    Protasov, M.
    JOURNAL OF SEISMIC EXPLORATION, 2021, 30 (05): : 419 - 446
  • [33] 3D Pose Tracking Using a Recovered 3D Model
    Chen, Wei
    Zhao, Yuelong
    Chen, Shu
    Ouyang, Jianquan
    JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS, 2018, 27 (04)
  • [34] Seismicity patterns along the Ecuadorian subduction zone: new constraints from earthquake location in a 3-D a priori velocity model
    Font, Yvonne
    Segovia, Monica
    Vaca, Sandro
    Theunissen, Thomas
    GEOPHYSICAL JOURNAL INTERNATIONAL, 2013, 193 (01) : 263 - 286
  • [35] Seismicity patterns along the ecuadorian subduction zone: New constraints from earthquake location in a 3-D a priori velocity model
    Font, Yvonne
    Segovia, Monica
    Vaca, Sandro
    Theunissen, Thomas
    Geophysical Journal International, 2013, 193 (01): : 263 - 286
  • [36] Transfer Regression Model for Indoor 3D Location Estimation
    Liu, Junfa
    Chen, Yiqiang
    Zhang, Yadong
    ADVANCES IN MULTIMEDIA MODELING, PROCEEDINGS, 2010, 5916 : 603 - 613
  • [37] 3D object representation using transform and scale invariant 3D features
    Akagunduz, Erdem
    Ulusoy, Ilkay
    2007 IEEE 11TH INTERNATIONAL CONFERENCE ON COMPUTER VISION, VOLS 1-6, 2007, : 55 - 62
  • [38] A New Shear-Velocity Model of Continental Australia Based on Multi-Scale Surface-Wave Tomography
    Magrini, Fabrizio
    Kaestle, Emanuel
    Pilia, Simone
    Rawlinson, Nicholas
    De Siena, Luca
    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2023, 128 (07)
  • [39] Simplified Model of 3D Velocity Field in a Stirred Tank
    Inoue, Yashiro
    Okada, Buntaro
    Hashimoto, Shunsuke
    KAGAKU KOGAKU RONBUNSHU, 2009, 35 (02) : 201 - 210
  • [40] WCDMA 3D location determination with 3D polarization using four 3-element arrays
    Labib, Mohamed A.
    Elkamchouchi, Hassan M.
    PIERS 2008 HANGZHOU: PROGRESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM, VOLS I AND II, PROCEEDINGS, 2008, : 239 - 245