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.

r_i

Required list. Travel-time residuals.

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

Root-mean-square travel-time residual and qualitative location quality. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

RMS (s)

Returned number in s. Root-mean-square residual.

Quality

Returned string. Location quality rating.

• 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.
• 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.

• Station Residual Outlier Sigma Flagger

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

• Double Difference Pair Mean Offset Summary

  Summarize double-difference relocation pairs: mean and RMS inter-event separation.

• Elapsed Time Last Event Segment Checker

  Compare elapsed time since the last segment rupture against the mean recurrence interval.