The Industry Standard for Strong-Motion Data Processing

From Raw Accelerograms to Advanced Seismic Parameters in Seconds.

SeismoSignal is an efficient, powerful, and user-friendly software package for the signal processing of strong-motion data. It is the essential tool for engineering seismologists, earthquake engineers, and researchers who need to derive accurate seismic parameters from raw accelerograms for use in seismic hazard analysis, ground motion characterization, and structural design.

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Precision Signal Correction & Filtering

Raw earthquake records often contain noise and offsets that must be corrected before analysis. SeismoSignal provides a robust suite of tools to clean and prepare your data:

  • Baseline Correction: Remove permanent displacement offsets using polynomial fitting (up to 3rd order) to ensure physically accurate velocity and displacement time-histories.

  • Digital Filtering: Eliminate low-frequency noise and high-frequency aliasing with causal and acausal Butterworth, Chebyshev, and Bessel filters. Supports High-pass, Low-pass, Band-pass, and Band-stop configurations.

  • Flexible Input: Reads accelerograms from single-column, multi-column, and standard formats (e.g., PEER NGA, SMC, SMC-1, CSA) without complex file conversion.

Comprehensive Spectral Analysis

Get the full frequency content and associated demand parameters of your ground motions.

  • Elastic Response Spectra: Calculate Pseudo-Spectral Acceleration (PSA), Velocity (PSV), and Displacement (SD) for various damping ratios.

  • Inelastic Response Spectra: Generate Constant-Ductility Inelastic Spectra to assess demand on non-linear structures.

  • Frequency Domain Analysis: Compute Fourier Amplitude Spectra (FAS) and Power Spectral Density (PSD) functions using Fast Fourier Transformation (FFT).

  • Overdamped Spectra: Analyze the response of highly damped systems (e.g., base-isolated structures).

Advanced Ground Motion Parameters

SeismoSignal automatically calculates the full range of intensity measures (IMs) required for modern Performance-Based Earthquake Engineering (PBEE):

  • Peak Ground Values: PGA, PGV, and PGD.

  • Energy & Intensity: Arias Intensity ($I_a$), Housner Intensity, Cumulative Absolute Velocity (CAV), and Specific Energy Density (SED).

  • Duration Metrics: Bracketed, Uniform, Significant ($D_$), and Effective Durations.

  • Frequency Content: Mean Period ($T_m$), Predominant Period ($T_p$), and Average Spectral Acceleration ($S_$).

  • Damage Potential: Damage Index, Maximum Incremental Velocity (MIV), and Impulsivity Index.

  • Husid Plots: Visualize the energy accumulation over time with Husid and Energy Flux plots

Who Needs SeismoSignal?

SeismoSignal is an essential tool for anyone who works with real earthquake accelerograms and needs fast, reliable, engineering-grade ground-motion parameters. It is widely used across the seismic and structural-engineering community, including:

  • Structural Engineers: Professionals performing seismic design, retrofit assessment, nonlinear time-history analysis, or site-specific studies depend on SeismoSignal to convert raw accelerograms into clean, corrected signals and compute all required parameters — response spectra, PGA/PGV/PGD, energy indices, durations and more.

  • Geotechnical Engineers: SeismoSignal provides the precise ground-motion characteristics needed for site-response analysis, liquefaction studies, soil-structure interaction modelling, and seismic hazard assessments. Cleaned and filtered input motions are essential for accurate geotechnical simulations.

  • Seismologists & Earthquake Network Analysts: Experts managing or analysing strong-motion data from seismic stations use SeismoSignal to validate recordings, remove noise, apply baseline correction, filter signals, and extract essential spectral and temporal parameters for scientific or operational purposes.

  • Engineering Consultants & Design Offices: Consultants preparing seismic assessment reports, retrofit proposals, or performance-based design submissions rely on SeismoSignal to generate publication-quality plots and tables that can be directly incorporated into technical documentation.

  • Academics, Researchers & Students: Universities and research institutions use SeismoSignal extensively for coursework, thesis projects, seismic hazard studies, and research on strong-motion behaviour. Its intuitive interface and comprehensive outputs make it ideal for both teaching and advanced research.

Anyone who needs to transform earthquake recordings into trustworthy, analysis-ready seismic parameters needs SeismoSignal.

New in v2026

  • Parallel Pulse Identification: Utilizing advanced algorithms and parallel processing, SeismoSignal now identifies velocity pulses in near-fault records faster than ever.

  • AI Assistant Integration: Get instant answers to your signal processing questions and software operation queries directly within the interface.

Key Capabilities at a Glance

Turn raw earthquake recordings into usable data

SeismoSignal handles preprocessing (baseline-correction and filtering) and extracts all required parameters, saving time and ensuring consistency.

Strong motion processing

SeismoSignal carries out signal processing of any acceleration time-history in a fast, efficient and user-friendly way

Visual Interface

No scripting required. Fully interactive plots of all the derived parameters

Seamless Export

One-click export of all numerical data and high-resolution plots to Excel, Word, and text files.

Ideal For

  • Processing and cleaning real earthquake accelerograms
  • Signal noise removal
  • Producing elastic/inelastic response spectra
  • Extracting key seismic parameters (PGA, PGV, PGD, Arias, CAV, etc.)
  • Analysing frequency content via FFT
  • Determining strong-motion durations and cycles
  • Preparing input motions for structural and geotechnical analyses
  • Ground motion characterization

Completely visual interface. No input or configuration files, programming scripts or any other time-consuming and complex text editing requirements.

Due to its full integration with the Windows environment, SeismoSignal allows for numerical and graphical results to be copied to any Windows application (e.g. MS Excel, MS Word, etc.), noting that the plots characteristics can be fully customised from within the program itself.

Licensing

Try our Earthquake Engineering Software Solutions for free by downloading a one month Trial Version*

Get a Commercial License and unleash the full potential of Seismosoft software and access to premium technical support.

Buy 2-5 SeismoSignal Licenses and get 25% discount or a 35% discount for 6 or more licenses!

Take advantage of our Bundle offer. Get 25% discount for the SeismoSignal and SeismoSpect Bundle!

Licenses for Academic Use & Discounts

We offer Academic Versions* with no time limitation for Academic Use to users who are currently enrolled with an academic/research institution. If you are interested in receiving an Academic License, please request it by using the registration module at the start-up of the programs.

Students, Academic Staff and/or Universities may benefit from a 10% discount to all full Commercial versions of Seismosoft products and product bundles.

* In Academic/Trial Version, baseline correction and filtering is not allowed within the program, a maximum period equal to 4.00sec and a minimum period step equal to 0.05sec are allowed for spectra.