Earthquake location by a sparse seismic network

  • Valerio MaterniEmail author
  • Alessandra Giuntini
  • Rodolfo Console
Original Article


Hypocentral locations, and depths in particular, are affected by large uncertainties in situations where the available seismic network is sparse and with a small number of local stations recording Pg phases as first arrival (Pg phase is direct wave in the upper crust). In this study, we consider the variability of locations because of the errors associated with arrival time picks, analyzing how this variability, for a constant standard deviation in arrival times, depends on the azimuthal distribution of stations and the number of available Pg phases in the input dataset. Our analysis was carried out on real cases and confirmed the importance of including local stations in the earthquake location process, quantifying how the removal of an increasing number of local stations increased the dispersion of hypocenters.


Location Seismic network Local stations Pg phases Dispersion of hypocenters 



We are grateful to Karl F. Veith for his invaluable comments and suggestion in the preparation of this article, with particular reference to the “Introduction” and “Discussion.” We thank also three reviewers for constructive remarks which have significantly contributed to the improvement of our manuscript.


  1. Bondar I, Myers SC, Engdahl ER, Bergman EA (2004) Epicentre accuracy based on seismic network criteria. Geophys J Int 156:483–496CrossRefGoogle Scholar
  2. Console R, Giuntini A (2006) An algorithm for double difference joint hypocenter determination application to the 2002 Molise (Central Italy) earthquake sequence. Ann Geophys 49:841–852. Google Scholar
  3. Eaton JP (1969) HYPOLAYR, a computer program for determining hypocenters of local earthquakes in an earth consisting of uniform flat layers over a half space. Open file report, U.S. Geological Survey.
  4. Geiger L (1912) Probability method for the determination of earthquake epicenters from the arrival time only. (translated from Geiger’s 1910 German article: Herbsetimmung bei Erdbeben aus den Ankunfzeiten. K. Gessell. Wiss. Goett. 4, 331-349). Bulletin of St. Louis University 8(1):56–71Google Scholar
  5. Lee WHK, Lahr JC (1972) HYP071: a computer program for determining hypocenter, magnitude, and first motion pattern of local earthquakes. Open file report, U. S. Geological Survey.
  6. Lomax A, Curtis A (2001) Fast, probabilistic earthquake location in 3-D models using oct-tree importance sampling. Geophys Res Abstracts, 3:955.
  7. Materni V, Giuntini A, Chiappini S, Console R, Chiappini M (2015) Relocation of earthquakes by source-specific station corrections in Iran. Bull Seismol Soc Am 105(5):2489–2509. CrossRefGoogle Scholar
  8. Myers SC (2000) Improving sparse network seismic location with bayesian kriging and teleseismically constrained calibration events. Bull Seismol Soc Am 90(1):199–211Google Scholar
  9. Pujol J (2000) Joint event location—the JHD technique and applications to data from local seismic networks. In: Thurber CH, Rabinowitz N (eds) Advances in seismic event location. Kluwer Academic Publishers, DordrechtGoogle Scholar
  10. Richards-Dinger KB, Shearer PM (2000) Earthquake locations in southern California obtained using source specific station terms. J Geophys Res 105:10939–10960CrossRefGoogle Scholar
  11. Sambridge M, Kennett BLN (1986) A novel method for hypocentre location. Geophys J R Astron Soc 87:679–697CrossRefGoogle Scholar
  12. Veith KF (1975) Refined hypocenters and accurate reliability estimates. Bull Seismol Soc Am 65:1199–1222Google Scholar
  13. Waldhauser F, Ellsworth WL (2000) A double-difference earthquake location algorithm: method and application to the northern Hayward fault, California. Bull Seismol Soc Am 90:1353–1368CrossRefGoogle Scholar

Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Istituto Nazionale di Geofisica e VulcanologiaRomeItaly
  2. 2.Centro di Geomorfologia Integrata per l’Area del MediterraneoPotenzaItaly

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