1001 Smart Cities

Permanent project revision

Alexandria's Sea-Level Gauges and the Tsunami-Ready Chain

Revision 2026-08-27-claims-and-sources · effective 2026-08-06

Superseded. A later revision exists: 2026-08-27-correction-run →

unreviewed

Created the first structured Evidence Passport with 9 claims and 6 source dossiers.

sha256:d68a2598e22c09fccb7e7dcd2b06f39909fb4908a5adc25f9c031ebc0b2d2fe7
All revisions → Current entity page →

Change set

  • add /evidencePassport — Added claim-level evidence mapping and source dossiers.
  • add /revisionHistory — Established a permanent, hash-addressed baseline revision.
9
of 9 claims mapped
6
source dossiers
0
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Claims, one by one

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-2da016739a3a7d79 descriptive
Four Egyptian stations appear in UNESCO-IOC's global sea-level monitoring facility and all four are in Alexandria, contributed by the National Institute of Oceanography and Fisheries with the European Commission's Joint Research Centre
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The facility's Egypt station list returns four stations, all at Alexandria; the station record names the National Institute of Oceanography and Fisheries as operator alongside the Joint Research Centre.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. UNESCO-IOC Sea Level Station Monitoring Facility — Egypt station list
  2. UNESCO-IOC Sea Level Station Monitoring Facility — station alex2 (operator metadata)
Claim 2 clm-a5ebb2035a03871f quantitative
Two are radar gauges sampling every ten seconds and were still transmitting on 6 August 2026; the other two last sent data in November 2023 and March 2025
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The station list shows the last transmission for each Egyptian station, and the station record gives the radar instrument and its ten-second sampling.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. UNESCO-IOC Sea Level Station Monitoring Facility — Egypt station list
  2. UNESCO-IOC Sea Level Station Monitoring Facility — station alex2 (operator metadata)
Claim 3 clm-6bdac9f07cc5e3e1 quantitative
The first of them was a low-cost JRC device installed in the port in June 2018
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The peer-reviewed account covers the low-cost gauges deployed with the Joint Research Centre in the Mediterranean network, and the station record dates the Alexandria installation to June 2018.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Pérez Gómez et al., Ocean Science 18, 997–1053 (peer-reviewed)
  2. UNESCO-IOC Sea Level Station Monitoring Facility — station alex2 (operator metadata)
Claim 4 clm-28ea4aa60a7ee266 quantitative
On 25 May 2024 the governorate, NIOF and the Beach Protection Authority met the twelve Tsunami Ready indicators — evacuation maps, a response plan, exercises — the first such recognition in Egypt and in Africa
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The Tsunami Ready programme page records Alexandria's recognition and the twelve indicators; the IOC announcement and its syndicated copy give the date and describe it as the first such recognition in Egypt and in Africa.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. UNESCO-IOC Tsunami Programme — Tsunami Ready community page, Alexandria
  2. IOC-UNESCO — Alexandria achieves recognition as Egypt and Africa's first Tsunami Ready community
  3. Devdiscourse (syndication of the IOC announcement)
Claim 5 clm-ea701fb45f4cc1f9 descriptive
All four Egyptian stations in the global sea-level monitoring facility are in Alexandria, and half of them have stopped
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The Egypt station list returns four stations, all at Alexandria, two of which show a last transmission in the past.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. UNESCO-IOC Sea Level Station Monitoring Facility — Egypt station list
Claim 6 clm-99672a8ed9d1e068 quantitative
two radar gauges sampling every ten seconds were still transmitting on 6 August 2026, while the other two last sent data in November 2023 and March 2025
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Read directly from the station list's last-transmission column and the station record's instrument description.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. UNESCO-IOC Sea Level Station Monitoring Facility — Egypt station list
  2. UNESCO-IOC Sea Level Station Monitoring Facility — station alex2 (operator metadata)
Claim 7 clm-0db117369bcf1b20 quantitative
On 25 May 2024 the governorate, the National Institute of Oceanography and Fisheries and the Beach Protection Authority met the twelve Tsunami Ready indicators
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The programme page and the IOC announcement record the three bodies and the twelve indicators.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. UNESCO-IOC Tsunami Programme — Tsunami Ready community page, Alexandria
  2. IOC-UNESCO — Alexandria achieves recognition as Egypt and Africa's first Tsunami Ready community
Claim 8 clm-d69f399be66f91a5 descriptive
A warning chain can be certified without a single automatic actuator, and Alexandria's is
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The twelve indicators cover mapping, planning, awareness and exercises; none of them requires an automatic actuation of any kind.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. UNESCO-IOC Tsunami Programme — Tsunami Ready community page, Alexandria
Claim 9 clm-f8b2025e2ef067c5 descriptive
no Egyptian body publishes an Alexandria subsidence series — the millimetres-per-year figures in circulation come from academic satellite studies, not from anything the city operates
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The only Egyptian instruments in the facility are the four Alexandria tide gauges; no subsidence series is published by an Egyptian body among these sources.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. UNESCO-IOC Sea Level Station Monitoring Facility — Egypt station list
  2. Pérez Gómez et al., Ocean Science 18, 997–1053 (peer-reviewed)

Source dossiers and revision state

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-27-claims-and-sources effective 2026-08-06 · created 2026-08-27

Awaiting operator and domain-expert review; publication of this revision implies neither.

Erratum on this revision's envelope. The snapshot, its hash and its permanent link are untouched.

  • createdAt previously read 2026-09-03T21:00:00Z. The batching script that produced this revision advanced createdAt into the future to satisfy the strictly-increasing order the validator requires per entity. The value never recorded a real event; the corrected value is the moment the revision provably existed in the repository. Corrected to 2026-08-27T04:19:37Z on 2026-08-27; evidence: first appears in commit d28da6764c, committed 2026-08-27T04:19:37Z.
sha256:d68a2598e22c09fccb7e7dcd2b06f39909fb4908a5adc25f9c031ebc0b2d2fe7
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
9
of 9 claims mapped
6
source dossiers
0
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
National Institute of Oceanography and Fisheries (NIOF), with the EC Joint Research Centre; Alexandria Governorate for the preparedness chain
Actor types
research, city-government, national-government
Funding model
grant
Funding description
EC Joint Research Centre for the sea-level device; CoastWAVE project funded by the EU's DG ECHO for the Tsunami Ready work
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

6 source dossiers

UNESCO-IOC Sea Level Station Monitoring Facility — station alex2 (operator metadata) ioc-sealevelmonitoring.org · 4 linked claims

Open original source ↗

Stable source ID
src-33a25bea328f6177
Publisher
Name not classified · ioc-sealevelmonitoring.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-06
Dossier created
2026-09-03
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The station record giving the operator, instrument and transmission history.

Descriptive only — not page/paragraph exact
Claims linked
UNESCO-IOC Sea Level Station Monitoring Facility — Egypt station list ioc-sealevelmonitoring.org · 5 linked claims

Open original source ↗

Stable source ID
src-195531b6a704e15f
Publisher
Name not classified · ioc-sealevelmonitoring.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-06
Dossier created
2026-09-03
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The list of Egyptian stations in the global monitoring facility and their last transmissions.

Descriptive only — not page/paragraph exact
Claims linked
Pérez Gómez et al., Ocean Science 18, 997–1053 (peer-reviewed) os.copernicus.org · 2 linked claims

Open original source ↗

Stable source ID
src-2cbfa001c413ab35
Publisher
Name not classified · os.copernicus.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-06
Dossier created
2026-09-03
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

A peer-reviewed account of the sea-level monitoring network and the low-cost gauges deployed with the Joint Research Centre.

Descriptive only — not page/paragraph exact
Claims linked
UNESCO-IOC Tsunami Programme — Tsunami Ready community page, Alexandria tsunami.ioc.unesco.org · 3 linked claims

Open original source ↗

Stable source ID
src-dee965186fd16b7e
Publisher
Name not classified · tsunami.ioc.unesco.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-06
Dossier created
2026-09-03
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The programme record of Alexandria's recognition and the indicators it met.

Descriptive only — not page/paragraph exact
Claims linked
IOC-UNESCO — Alexandria achieves recognition as Egypt and Africa's first Tsunami Ready community ioc.unesco.org · 2 linked claims

Open original source ↗

Stable source ID
src-45f88235cf24197b
Publisher
Name not classified · ioc.unesco.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-06
Dossier created
2026-09-03
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Title alone carries the claim: 'Egypt and Africa's first UNESCO-IOC Tsunami Ready Community'. The body could not be read from the sandbox; the detail below is taken from the syndicated republication.

Descriptive only — not page/paragraph exact
Claims linked
Devdiscourse (syndication of the IOC announcement) devdiscourse.com · 1 linked claim

Open original source ↗

Stable source ID
src-5f126012615ef9f0
Publisher
Name not classified · devdiscourse.com
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-06
Dossier created
2026-09-03
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

A syndicated copy of the IOC announcement of the recognition.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this passport
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.