iLoc location algorithm

Here you can download the iLoc location algorithm. Platforms: unix, linux, Mac OS. Author: István Bondár.

The single event location algorithm, iLoc accounts for correlated travel-time prediction errors due to unmodeled 3D velocity structure (Bondár and McLaughlin, 2009) and it is the expansion of the ISC location algorithm (Bondár and Storchak, 2011) with new added features, such as integrated RSTT (Myers et al., 2010) travel-time predictions, support for local velocity models, communication with the SeisComp and IDC NDC-in-a-Box database schemas, local magnitude (ML) and broadband body wave magnitude (mB) calculation, as well as support for the IMS1.0, and ISF file formats.


  • Bondár I, Storchak D, 2011: Improved location procedures at the International Seismological Centre, Geophys. J. Int. 186, 1220-1244.
  • Myers SC, Begnaud ML, Ballard S, Pasyanos ME, Phillips WS, Ramirez AL, Antolik MS, Hutcheson KD, Dwyer JJ, Rowe CA, Wagner GS, 2010: A crust and upper-mantle model of Eurasia and North Africa for Pn travel-time calculation, Bull. Seism. Soc. Am. 100, 640–656.
  • Bondár, I. and K. McLaughlin, 2009: Seismic location bias and uncertainty in the presence of correlated and non-Gaussian travel-time errors, Bull. Seism. Soc. Am., 99, 172-193.
  • Bondár, I. P. Mónus, Cs. Czanik, M. Kiszely, Z. Gráczer, Z. Wéber, and the AlpArrayWorking Group, 2018: Relocation of Seismicity in the Pannonian Basin Using a Global 3D Velocity Model, Seism. Res. Let., 89, 2284-2293, doi:10.1785/0220180143.