Richter/Moment Magnitude ↔ Seismic Energy implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-038

Effect

Computation or source lookup only

Input and validation requirements

Zero joules is a valid-looking numeric input but makes the inverse logarithm undefined. The instrument must reject E = 0; returning a finite magnitude would be a failure.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "magnitude": 5,
    "magnitude_type": "Mw"
  },
  "expected_outputs": {
    "energy_j": 1995262314968.879,
    "tnt_tonnes": 476.8791,
    "tnt_kilotonnnes": 0.4768791
  },
  "working": "log10(E) = 4.8 + 1.5*5.0 = 4.8 + 7.5 = 12.3. Therefore E = 10^12.3 = 1.9952623149688788e12 J. TNT tonnes = 1.9952623149688788e12 / 4.184e9 = 476.8791 tonnes. TNT kilotonnes = 476.8791 / 1000 = 0.4768791 kt."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json