QuakeManager provides users with integrated ground motion selection, modification and analysis tools, incorporating latest state-of-the-art techniques by ground motion researchers.

QuakeManager provides utilities for file management, import and export of data, unit conversion, and data visualization, which are seamlessly integrated into the user interface. By integrating those functionalities into one easy-to-use program, built around a powerful ground motion database manager, the process of ground motion selection, modification and analysis can be performed accurately and efficiently.

QuakeManager incorporates the two primary methods used in engineering practice: Amplitude Scaling and Spectral Matching. The software consists of multiple modules that are tightly integrated within a common user-interface which allows data to flow seamlessly between modules: QuakeSelect, QuakeMatch, QuakeLibrary, and QuakeSpec, with other modules that are under development.

Main Features

Ground Motion Database: Fully searchable and customizable

Optimized Ground Motion Suite Selection and Scaling

Powerful Spectral Matching: Tight and Mean Record Matching

Calculation of record spectra and intensity measures

Ground Motion Rotation and Modification


US & International Code Compliant for GM Selection & Modification

Why Use QuakeManager?

Powerful Features and User-Interface: Unmatched Capabilities and ease of use

Complete Solution: All steps of ground motion selection and modification in one software

Fast and Efficient Calculations: Calculate Spectra & Intensities, Scale and Modify Records

Project Documentation and Archiving: Auto-Generate Reports and Save Project Data

License Limitations

Modules Trial Standard Professional Advanced
QuakeSelect i
Unique Suites i
Pulse records i
Search Filters i
Advanced Parameters i
Maximum Suite Size i 7 11 Unlimited Unlimited
Customized GM Fitting Criteria i ReadOnly
Match Type i Components & Bidirectional Components & Bidirectional Components, Bidirectional & Custom Components, Bidirectional & Custom
QuakeMatch i Preview
Tight/Smooth Matching i Preview
Mean/Average Matching i Preview
Match Dispersion i Preview
Components i Preview
Match Bidirectional i Preview
Match RotD100/RotD00 i Preview
Preserve H1/H2 ratio i Preview
QuakeSpec i
Component Spectra i
Resultant Spectra i
Rotated Spectra i
FN/FP Spectra i
Intensity Measures i
QuakeLibrary i
Ground Motion Formats i 16 17 17
Import/Export i All except user-defined
GMImportTool i All except user-defined
Tools i
GM Record Rotation i
Reporting i
Report Generator i
General i
Project Saving & Loading i
Max number of Record Suites i 2 3 5 Unlimited
Code Design Spectra i
US Codes i
Get Trial Get Quote Get Quote Get Quote

User Interface

QuakeManager user-interface is designed for power and ease of use.

Target Spectrum

Easy definition of Code design spectra (based on ASCE-7 or IBC).

Define Site-specific spectra easily by direct entry or Copy & Paste.


The QuakeSelect module provides enhanced record selection and scaling by selecting suites with optimal spectral shapes and statistics matching those of the target spectrum, while satisfying a variety of seismological, statistical, and code constraints.

  • Multiple Filter and Constraint options to adjust selection
  • Achieves optimal selection of ground motion suites
  • Ability to select ground motions from events with desired tectonic properties
  • Select similar spectral shapes to the target spectrum

GM Fitting Criteria enable users to define parameters to optimize their suite selection. Parameters include:

  • Scale Factor Range
  • Scaling Period Range and Weights
  • Methods for measuring error
  • Desired Dispersion
  • Conditions on scaling the average suite


QuakeMatch incorporates both tight and mean spectral matching.

A conventional spectral matching typically performed, where each ground motion is modified such that its spectrum perfectly matches the target. This minimizes the potential amplification of higher modes and significantly reduces the variability in spectral ordinates.

A hybrid spectral matching method, where records in the suite are each slightly modified such that the average (and optionally the dispersion) of the suite perfectly matches the target. It preserves the peaks and valleys, characteristic period and energy content of the records.


Fully-featured Library allowing user to browse, search, create, share and manage a large number of ground motion records from multiple databases with different file formats from worldwide libraries.

Import an unlimited number of records and automatically detect the record file format.

Time Histories

QuakeManager can plot a wide range of charts including time history charts allowing the user to visualize large data sets.

Polar Charts

The polar chart allows the users to plot the bidirectional interaction trace and response envelope of the ground motion. The response is calculated for a particular period and damping using a two-degree-of-freedom (2DOF) bidirectional system.

GM Record Rotation

The Record Rotation Tool allows the user to easily rotate records to Fault-Normal/Fault-Parallel orientation, or any other orientation.

Report Generator

The Report Generator automates the generation of GM Selection and Spectral Matching reports. It automatically generates a complete MS-Word report with tables and charts for all selected records. The user can then review the report, make modifications and save.