Use this seismology calculation to reproduce a stated convention, screen observations, or compare scenarios whose units, coordinate conventions, catalog selection, and model assumptions are known.

A (cm)

Required number in cm. Band-passed pressure amplitude (cm equivalent sea height).

T (min)

Required number in min. Dominant wave period.

The cited overview of Tsunami supplies background for the terminology and domain context used by this tool.^[1]

Flag DART bottom-pressure observations whose amplitude and period band match a tsunami signature. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Flagged

Returned boolean. Whether the signal qualifies as tsunami.

Note

Returned string. Screening note.

• Earth structure, source geometry, path effects, site response, instrument response, catalog completeness, uncertainty, and the fitted range can dominate the accuracy of simplified seismic calculations.
• A must be at least 0.
• T must be at least 0.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

For analysis or hazard decisions, retain uncertainty and provenance and compare the result with waveform processing, calibrated regional models, and guidance from qualified seismologists or the responsible agency.

• Geophone Natural Period Response Corner Lookup

  Response corner and usable band for common geophone classes by natural frequency.

• Response Spectrum Corner Period Band Lookup

  Acceleration- and velocity-controlled period bands scaled by magnitude class.

• Station Residual Outlier Sigma Flagger

  Flag stations whose travel-time residuals exceed k standard deviations of the set.