# event (occurrence)

a change that occurs in a place during a time

- Computed level: L3 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: everyday  ·  Arena: EmergenceLexicon

## Emergence
**Emerges from:** [change](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-change.process), [space](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-space.extent), [time](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-time.dimension), [occurs](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-occurs.event)

**Through:** the change happens in a place during time

**Novel properties:**
- localized occurrence
- temporal manifestation
- eventness

## Examples
- The 2011 Tōhoku earthquake shifted Japan's coastline by 4.4 meters and triggered a tsunami. *(geology)*
- The Heartbleed bug exposed OpenSSL memory contents for two years before it was patched. *(computing)*
- Halley's Comet appears every 76 years, last spotted in 1986 and expected next in 2061. *(astronomy)*

## Used by
- [already](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-already.temporal) (L4)
- [club](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-club.social) (L10)
- [experience](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-experience.cognitive) (L12)
- [history](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-history.record) (L7)
- [journal](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-journal.record) (L18)
- [login](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-login.digital) (L12)
- [memory](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-memory.cognitive) (L20)
- [records](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-records.document) (L11)
- [report](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-report.information) (L8)
- [story](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-story.narrative) (L13)
- [subject](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-subject.entity) (L5)
- [surprise](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-surprise.reaction) (L15)
- [test](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-test.assessment) (L10)

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-event.occurrence*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-event.occurrence.json*  
*Every definition provably resolves to space, time, energy and pattern.*