File Name Ch Length Sampling Type Unit Scale Date & Time Azimuth


Filter Order
Cut-off Freq. (F1) Hz.
Cut-off Freq. (F2) Hz.
Maximum ripple size (dB)
Zero Phase Filtering
Select to Display
Original Signal
1st Integral
2nd Integral
Select to display
Frequency [Hz]
Damping Ratio
Sampling Interval [s]
Record Duration [s]
Initial Displacement (cm)
Initial Velocity (cm/s)
Har. Excitation Amplitude
Har. Excitation Frequency [Hz]
Yield Acceleration (cm/s²)
Post-Yield Hardening Ratio
Unloading Stiffness Degradation

Select to display
Minimum Period (s)
Period Step (s)
Maximum Period (s)
Unloading Stiffness Degradation
Post-Yield Hardening Ratio
Damping Ratio Count
Damping Ratio-1
Damping Ratio-2
Damping Ratio-3
Damping Ratio-4
Ductility Count
Constant Ductility-1
Constant Ductility-2
Constant Ductility-3
Constant Ductility-4

Select to display
Bracketed Duration Threshold (g)
Select to display
Spectral Density Spectrum Parameters
Window Length (s)
Overlap Ratio
Window Type
File Name Unit ChNum FSamp Date&Time Azimuth
H1 N/A
H2 N/A
V N/A

H/V Spectral Ratio Parameters
Window Length (s)
Overlap Ratio
Combination Method
Konno-Ohmachi Bandwidth Coefficient (b)
Overlapped Duration, s
File Name Unit ChNum FSamp Date&Time Azimuth
C1 N/A
C2 N/A

Overlapped Duration, s
Alfa
Beta
Maximum dt/T
Out-of-balance Force Tolerance
Ductility Convergence Tolerance
Drop seismic data files to upload
.vif, .txt, .v1, .v1c, .raw, .msd, .mseed, .asc, .dat, .at2, .vt2, .dt2
Disclaimer

This website and its associated tools are provided for informational, educational, and research purposes only. No guarantee is made as to the completeness, accuracy, or fitness for any particular purpose of the calculations, algorithms, or data presented.

Results generated by this tool must not be used as the sole basis for structural design, seismic hazard assessment, or engineering decisions without independent verification by a qualified professional engineer. Users are solely responsible for validating outputs against applicable codes, standards, and project requirements before relying on them in practice.

This tool is not a substitute for professional engineering judgment. The author assumes no liability for any errors, omissions, or damages — direct, indirect, incidental, or consequential — arising from the use of this website or its outputs.

Third-party data sources used where applicable (e.g., ground motion databases) should be independently verified against original sources before use.

By continuing, you acknowledge that you use this tool at your own risk.