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774–775 carbon-14 spike

observed increase of 1.2% in the concentration of carbon-14 isotope in tree rings dated to 774 or 775
Event occurrence Q4643553
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774–775 carbon-14 spike

Summary

774–775 carbon-14 spike is an occurrence[1]. It draws 80 Wikipedia views per month (occurrence category, ranking #226 of 1,403).[2]

Key Facts

  • 774–775 carbon-14 spike's instance of is recorded as occurrence[3].
  • 774–775 carbon-14 spike's instance of is recorded as cosmic radiation[4].
  • 774–775 carbon-14 spike's start time is recorded as +0774-00-00T00:00:00Z[5].
  • 774–775 carbon-14 spike's end time is recorded as +0775-00-00T00:00:00Z[6].
  • 774–775 carbon-14 spike's Freebase ID is recorded as /m/0j_5c7w[7].
  • 774–775 carbon-14 spike's has cause is recorded as Q25381284[8].
  • 774–775 carbon-14 spike's schematic is recorded as Time profile of the 774 AD spike in C-14..jpg[9].

Why It Matters

774–775 carbon-14 spike draws 80 Wikipedia views per month (occurrence category, ranking #226 of 1,403).[2] It has Wikipedia articles in 12 language editions, a strong signal of global cultural recognition.[10] It is known by 3 alternative names across languages and contexts.[11]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [10] ↑ . Wikidata sitelinks. wikidata.org.
  3. [11] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). 774–775 carbon-14 spike. Retrieved May 3, 2026, from https://4ort.xyz/entity/774-775-carbon-14-spike
MLA “774–775 carbon-14 spike.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/774-775-carbon-14-spike.
BibTeX @misc{4ortxyz_774-775-carbon-14-spike_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{774–775 carbon-14 spike}}, year = {2026}, url = {https://4ort.xyz/entity/774-775-carbon-14-spike}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 774–775 carbon-14 spike — https://4ort.xyz/entity/774-775-carbon-14-spike (retrieved 2026-05-03)

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