Earthquake origin time is defined by the arrival of the first seismic wave

the verdict

COMMON KNOWLEDGE

Legacy classification; evidence review pending

Recorded sources

no sources on either side

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that earthquake origin time is defined by the arrival of the first seismic wave?

Earthquake origin time is defined by physical rupture initiation and is standard seismological knowledge requiring no citation.

Verdict: COMMON KNOWLEDGE · 0 sources for, 0 against · Last checked 4 Aug 2026

The analysis

The claim defines a basic seismological concept (earthquake origin time) that is universally accepted by definition and everyday observation in geophysics, making it common knowledge.

What does the evidence say?

The claim defines a basic seismological concept (earthquake origin time) that is universally accepted by definition and everyday observation in geophysics, making it common knowledge.

Receipt History

first checked04 Aug 2026

judged → COMMON KNOWLEDGE · 9504 Aug 2026

Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.

Check your own claim

Challenge the receipt

I have a source that contradicts this verdict I have a source that supports it No source: request a receipt review Requests are recorded for review. This does not start an automatic check or guarantee a response time.

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work