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.

N

Required integer. Converter bit depth.

SNDR_dB

Required number. Measured signal-to-noise-and-distortion ratio.

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

Effective number of bits from the measured SNDR: ENOB = (SNDR − 1.76)/6.02. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

ENOB

Returned number. Effective number of bits.

Δbits

Returned number. Bits lost to noise and nonlinearity.

• 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.
• N must be at least 1.
• 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.

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