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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 geomagnetic_storm Q4643553
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Summary

774–775 carbon-14 spike is a geomagnetic storm[1]. It draws 364 Wikipedia views per month (geomagnetic_storm category, ranking #226 of 7).[2]

Key Facts

  • 774–775 carbon-14 spike's instance of is recorded as geomagnetic storm[3].
  • 774–775 carbon-14 spike's instance of is recorded as cosmic radiation[4].
  • 774–775 carbon-14 spike began on 774[5].
  • 774–775 carbon-14 spike ended on 775[6].
  • 774–775 carbon-14 spike's has cause is recorded as Éruption solaire de 774-775[7].

Body

When and Where

774–775 carbon-14 spike began on 774[5]. It ended on 775[6].

Context

Recorded instance of include geomagnetic storm[3] and cosmic radiation[4].

Why It Matters

774–775 carbon-14 spike draws 364 Wikipedia views per month (geomagnetic_storm category, ranking #226 of 7).[2] It has Wikipedia articles in 12 language editions, a strong signal of global cultural recognition.[8] It is known by 16 alternative names across languages and contexts.[9]

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.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [8] ↑ . Wikidata sitelinks. wikidata.org.
  3. [9] ↑ . 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 October 16, 2026, from https://4ort.xyz/entity/774-775-carbon-14-spike
MLA “774–775 carbon-14 spike.” 4ort.xyz Knowledge Graph, 4ort.xyz, 16 Oct. 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: 2026-10-16}}
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 2026-10-16)

Canonical URL: https://4ort.xyz/entity/774-775-carbon-14-spike · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 6w ago · Bouzinac · 2026-09-03 view diff on Wikidata ↗
    Has cause → Éruption solaire de 774-775
    End time → —
    Start time → —
    Start time → +0774-00-00T00:00:00Z
    + 4 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update:2||1 */ Instance of: geomagnetic storm"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.