Earthquake Hazards Program

U.S. Geological Survey
David M. Boore
version 2.0

TSPP—A Collection of FORTRAN Programs for Processing and Manipulating Time Series

By David M. Boore

2008, revised December 10, 2009

Plot of acceleration, velocity, and displacement time series from zoc processing. (from figure 1).


This report lists a number of FORTRAN programs that I have developed over the years for processing and manipulating strong-motion accelerograms. The collection is titled TSPP, which stands for Time Series Processing Programs. I have excluded “strong-motion accelerograms” from the title, however, as the boundary between “strong” and “weak” motion has become blurred with the advent of broadband sensors and high-dynamic range dataloggers, and many of the programs can be used with any evenly spaced time series, not just acceleration time series.

This version of the report is relatively brief, consisting primarily of an annotated list of the programs, with three examples of processing, and a few comments on usage. I do not include a parameter-by-parameter guide to the programs. A USGS Open-File report that includes more examples of processing and illustrations of the various parameter choices in the programs is being prepared by Sinan Akkar and myself.

Although these programs have been used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the USGS as to the accuracy or functioning of the programs and related program material, nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith.

The programs are distributed on an “as is” basis, with no warranty of support from me. These programs were written for my use and are being publically distributed in the hope that others might find them as useful as I have. I would, however, appreciate being informed about bugs, and I always welcome suggestions for improvements to the codes. Please note that I have made little effort to optimize the coding of the programs or to include a user-friendly interface (many of the programs in this collection have been included in the software usdp (Utility Software for Data Processing,, being developed by Akkar et al. (personal communication, 2008); usdp includes a graphical user interface). Speed of execution has been sacrificed in favor of a code that is intended to be easy to understand, although on modern computers speed of execution is rarely a problem.

I will be pleased if users incorporate portions of my programs into their own applications; I only ask that reference be made to this report as the source of the programs.

Download this report as a 57-page PDF file (of2008-1111_v2.0.pdf; 1.4 MB).

For questions about this report, contact Dave Boore.

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