---
title: "San Diego Union Tribune in the Machine Relations Index"
description: "sandiegouniontribune.com appeared as a cited source in 2 of 38,449 monitored answer runs (under 0.01%) from 2026-05-10 to 2026-11-11."
canonical: "https://machinerelations.ai/index/domains/sandiegouniontribune.com"
---

# San Diego Union Tribune in the Machine Relations Index

sandiegouniontribune.com appeared as a cited source in 2 of 38,449 monitored answer runs (under 0.01%) from 2026-05-10 to 2026-11-11.

Canonical URL: https://machinerelations.ai/index/domains/sandiegouniontribune.com
Canonical domain: sandiegouniontribune.com
Source role: Editorial publication
Release mri_score_v2.1+2026-11-11+d52a5886914e; methodology mri_score_v2.1; generated 2026-11-11; window 2026-05-10 to 2026-11-11; artifact fecc44142bec.

## How the Site Describes Itself

> Sandiegouniontribune.com covers local news in San Diego County, CA, California and national news, sports, things to do and the best places to eat, business and the San Diego housing market.

sandiegouniontribune.com describes itself this way in the description tag on its homepage, read on November 11, 2026. It is the source's own wording, quoted as found, not a finding of this Index.

## Overall Evidence

- Citation rate: under 0.01%
- Cited runs: 2 of 38,449
- Days cited: 2 of 179
- Engine breadth: 2 observed engines (google_ai_overviews, perplexity)
- Confidence: Collecting
- Standing: Collecting: no rank until it clears the evidence floor

## Observed Segments

| Category | Question shape | State | Cited runs | Observed runs | Run dates | Rate | Standing |
|---|---|---|---:|---:|---:|---:|---|
| [Consumer Health](https://machinerelations.ai/index/categories/consumer-health) | [Comparisons](https://machinerelations.ai/index/categories/consumer-health/x_vs_y) | published | 1 | 304 | 13 | 0.33% | #261 of 305 |
| [Local Services](https://machinerelations.ai/index/categories/local-services) | [Is it worth it](https://machinerelations.ai/index/categories/local-services/is_x_worth) | published | 1 | 202 | 11 | 0.50% | #221 of 243 |

## Citation History

sandiegouniontribune.com was first cited in a monitored answer run on November 4, 2026, and most recently on November 11, 2026, both in this release's latest month. The release window opens 2026-05-10, so an earlier citation would not show here.

A month's rate is the share of all monitored answer runs that month that cited this domain. The latest month is still collecting.

| Month | Cited runs | Observed runs | Rate |
|---|---:|---:|---:|
| November 2026 (to 2026-11-11) | 2 | 3,966 | 0.05% |

## By Answer Engine

An engine's rate is its cited runs over every monitored run that engine answered in the window. Engines answer different numbers of runs, so compare rates, not counts.

| Engine | Cited runs | Engine's observed runs | Rate |
|---|---:|---:|---:|
| [Google AI Overviews](https://machinerelations.ai/index/engines/google_ai_overviews) | 1 | 1,354 | 0.07% |
| [Perplexity](https://machinerelations.ai/index/engines/perplexity) | 1 | 9,257 | 0.01% |
| [ChatGPT](https://machinerelations.ai/index/engines/chatgpt) | 0 | 9,137 | 0.00% |
| [Claude](https://machinerelations.ai/index/engines/claude) | 0 | 9,177 | 0.00% |
| [Gemini](https://machinerelations.ai/index/engines/gemini) | 0 | 7,326 | 0.00% |
| [Google AI Mode](https://machinerelations.ai/index/engines/google_ai_mode) | 0 | 2,198 | 0.00% |

Since August 31, 2026, San Diego Union Tribune is cited in none of 992 observed Google AI Mode runs. Google AI Mode's collection changed between August 10, 2026 and August 30, 2026, so its row above pools both sides of the change.

Since October 7, 2026, San Diego Union Tribune is cited in 1 of 4,488 observed Perplexity runs (0.02%). Perplexity's collection changed between October 6, 2026 and October 7, 2026, so its row above pools both sides of the change.

## Peers

San Diego Union Tribune holds its best segment rank, #221 of 243, in Local Services / Is it worth it, at 0.50%. 101 sources on that leaderboard share that rate, and their order inside the tie is not a measured difference. Listed here: the nearest sources cited more and less often than it, and the sources beside it that share this best segment. Leaderboard: https://machinerelations.ai/index/categories/local-services/is_x_worth

| Rank | Source | Source role | Segment citation rate | Against this source |
|---|---|---|---:|---|
| #132 of 243 | [modahealth.com](https://machinerelations.ai/index/domains/modahealth.com) | Other observed source | 0.99% | +0.49 pts |
| #133 of 243 | [policynest.net](https://machinerelations.ai/index/domains/policynest.net) | Other observed source | 0.99% | +0.49 pts |
| #134 of 243 | [quora.com](https://machinerelations.ai/index/domains/quora.com) | Community and social platform | 0.99% | +0.49 pts |
| #135 of 243 | [riverbluffdental.com](https://machinerelations.ai/index/domains/riverbluffdental.com) | Other observed source | 0.99% | +0.49 pts |
| #136 of 243 | [rubyscleaningsandiego.com](https://machinerelations.ai/index/domains/rubyscleaningsandiego.com) | Other observed source | 0.99% | +0.49 pts |
| #137 of 243 | [teethtalkgirl.com](https://machinerelations.ai/index/domains/teethtalkgirl.com) | Other observed source | 0.99% | +0.49 pts |
| #220 of 243 | [sandiegocleaningcost.org](https://machinerelations.ai/index/domains/sandiegocleaningcost.org) | Other observed source | 0.50% | Same rate |
| #222 of 243 | [schwantesheating.com](https://machinerelations.ai/index/domains/schwantesheating.com) | Other observed source | 0.50% | Same rate |

## Citation

Machine Relations Index (MRI), Machine Relations Research — machinerelations.ai. San Diego Union Tribune (sandiegouniontribune.com), under 0.01% citation rate, 2 of 38,449 monitored answer runs, 2026-05-10 to 2026-11-11. Release mri_score_v2.1+2026-11-11+d52a5886914e. CC BY 4.0. https://machinerelations.ai/index/domains/sandiegouniontribune.com

APA

Parrott, J. (2026). San Diego Union Tribune (sandiegouniontribune.com) in the Machine Relations Index (Version mri_score_v2.1+2026-11-11+d52a5886914e) [Data set]. Machine Relations Research. https://machinerelations.ai/index/domains/sandiegouniontribune.com https://doi.org/10.5281/zenodo.23652423

BibTeX

```bibtex
@misc{parrott2026mrisandiegouniontribunecom,
  author = {Parrott, Jaxon},
  title = {San Diego Union Tribune (sandiegouniontribune.com) in the Machine Relations Index},
  year = {2026},
  version = {mri\_score\_v2.1+2026-11-11+d52a5886914e},
  publisher = {Machine Relations Research},
  url = {https://machinerelations.ai/index/domains/sandiegouniontribune.com},
  doi = {10.5281/zenodo.23652423},
  license = {CC-BY-4.0},
  note = {Machine Relations Index (MRI), Machine Relations Research — machinerelations.ai}
}
```

DOI: https://doi.org/10.5281/zenodo.23652423

Citation file: https://machinerelations.ai/CITATION.cff

## Badge

Badge image: https://machinerelations.ai/index/domains/sandiegouniontribune.com/badge.svg

[![San Diego Union Tribune in the Machine Relations Index: cited in under 0.01% of monitored AI answers (2 of 38,449 runs), Nov 11, 2026 release. Machine Relations Research.](https://machinerelations.ai/index/domains/sandiegouniontribune.com/badge.svg)](https://machinerelations.ai/index/domains/sandiegouniontribune.com)

Put this badge on your site to show how often AI answers cite it. It links to this profile and updates with every new release; if a later release no longer includes this domain, the badge stops loading. To keep today's numbers fixed, save the SVG and host it yourself.

## Use the data

The public JSON is https://machinerelations.ai/data/machine-relations-index.json. The release manifest is https://machinerelations.ai/data/mri-release-manifest.json. The domain CSV is https://huggingface.co/datasets/machine-relations/machine-relations-index/resolve/main/domains.csv. The Zenodo concept DOI is https://doi.org/10.5281/zenodo.23652423.

```bash
curl -fsSL "https://machinerelations.ai/data/machine-relations-index.json" -o machine-relations-index.json
curl -fsSL "https://machinerelations.ai/data/mri-release-manifest.json" -o mri-release-manifest.json
curl -fsSL "https://huggingface.co/datasets/machine-relations/machine-relations-index/resolve/main/domains.csv" -o domains.csv
curl -fsSL -L "https://doi.org/10.5281/zenodo.23652423" -o mri-zenodo.html
```

```python
import json
from urllib.request import urlopen

index_url = "https://machinerelations.ai/data/machine-relations-index.json"
with urlopen(index_url) as response:
    index = json.load(response)
print(index["generated"], index["total_domains"])
```

## Public Boundary

The public dataset reports citation rates, rankings, and evidence counts. It excludes internal query identifiers, raw cited URLs, and answer-engine provider payloads. MRI measures observed root-domain citations in monitored prompts; it does not measure all AI answers, recommendation quality, website traffic, or commercial performance. A citation does not prove source support, and MRI confidence is not an Answer-Source Fidelity grade.

## Related Sources

- [Machine Relations Index](https://machinerelations.ai/index)
- [Public JSON artifact](https://machinerelations.ai/data/machine-relations-index.json)
- [Release manifest](https://machinerelations.ai/data/mri-release-manifest.json)
- [San Diego Union Tribune on AuthorityTech's publication intelligence](https://authoritytech.io/publications/sandiegouniontribune) — part of the AuthorityTech publication intelligence projection. Practitioner projection derived from the neutral Machine Relations Index. It is not source evidence, citation provenance, or sameAs identity for the neutral dataset.
- [AuthorityTech publication intelligence projection](https://authoritytech.io/publications.md) — Practitioner projection derived from the neutral Machine Relations Index. It is not source evidence, citation provenance, or sameAs identity for the neutral dataset.