gmsp: Ground Motion Signal Processing
Implements short-time Fourier transform (STFT) based processing of strong-motion time series: time-grid regularisation, STFT-window and anti-alias-resampling strategy selection, edge tapering, and frequency-domain integration and differentiation, mapping a single input (acceleration, velocity, or displacement) to a consistent triplet under a chosen analysis bandwidth. Also provides intrinsic-mode-function decomposition via empirical mode decomposition (EMD), ensemble EMD (EEMD), and variational mode decomposition (VMD) with optional band-rule filtering; elastic single-degree-of-freedom (SDOF) domain-normalised acceleration, velocity, and displacement response spectra from their corresponding time-series domains by exact state-space integration; intensity measures including peak, root-mean-square (RMS), Arias intensity, significant-duration, cumulative absolute velocity, mean period, and the derived indices earthquake destructiveness potential (EPI) and power-of-input (PDI); and D50 and D100 horizontal response spectra. Methods: Huang et al. (1998) <doi:10.1098/rspa.1998.0193>, Wu and Huang (2009) <doi:10.1142/S1793536909000047>, Dragomiretskiy and Zosso (2014) <doi:10.1109/TSP.2013.2288675>, Boore (2010) <doi:10.1785/0120090400>. An optional indexing layer parses provider files in formats including 'PEER' 'NGA-West2' 'AT2', 'CESMD' 'V2'/'V2c', 'NWZ' 'V2A', Geological Survey of Canada 'TR', 'IGP'/'UCR' 'AC' variants, and generic two-column ASCII text, normalises components, writes per-record CSV (comma-separated values) and JSON (JavaScript Object Notation) pairs, and computes per-record intensity tables.
| Version: |
1.1.1 |
| Depends: |
R (≥ 4.1.0) |
| Imports: |
data.table, digest, expm, jsonlite, Matrix, osqp, parallel, pracma, seewave, signal, stats, tools, utils, xemd |
| Suggests: |
bit64, knitr, rmarkdown |
| Published: |
2026-11-11 |
| DOI: |
10.32614/CRAN.package.gmsp |
| Author: |
Alejandro Daniel Verri
 [aut, cre,
cph] |
| Maintainer: |
Alejandro Daniel Verri <averri at fi.uba.ar> |
| License: |
AGPL (≥ 3) |
| URL: |
https://kanameishi.github.io/gmsp/ |
| NeedsCompilation: |
no |
| SystemRequirements: |
tar (for archived record metadata) |
| Materials: |
README, NEWS |
| CRAN checks: |
gmsp results |
Documentation:
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