WatchTaiwan StraitQuestion
Civil ResilienceInfrastructure continuityActive
Can communications and civil systems function under disruption?
Cable incidents and repair times, the throttling drills' findings, and which civil layers keep working when data does not.
- Opened
- Last reviewed
- Status as of
- Reviews
- 13 since 2026-08-02
- Confidence
- Moderate confidence
A Watch question is not a forecast. It names the evidence that would change an assessment and records what each review found — including the reviews that found nothing moved.
Where it stands
Standing assessment
Current assessment
Moderate confidenceAs of
The August 2026 throttling drills cut mobile data to about one per cent of capacity for roughly 17 million people and showed which layers survive: voice, SMS and emergency cell broadcast kept working; payments, banking, ticketing and app authentication did not.
No new undersea-cable or grid incident has been identified since the drills, and attribution for cable incidents has been contested in every case on record.
Latest reviewNo material change3 without change
No cable incident found. Typhoon Champi cut power to about 77,000 households on 23 October, by the operator's count, with no cascade reported. No payment-continuity measure or drill found. The Philippines said on 21 October it is exploring cable-protection cooperation with Taiwan, with no agreement. The third Matsu cable repair is still not verified.
Weekly BriefTaiwan Strait developments — 25 October 2026
The standing file was checked and nothing moved. A finding, not an absence. The condition stands as of .
- 2026-08-09: No material change
- 2026-08-16: Movement observed
- 2026-08-23: No material change
- 2026-08-30: No material change
- 2026-09-06: No material change
- 2026-09-13: No material change
- 2026-09-20: No material change
- 2026-09-27: Movement observed
- 2026-10-04: Movement observed
- 2026-10-11: No material change
- 2026-10-18: No material change
- 2026-10-25: No material change
What would change the assessment2 assessment-change conditions · qualitative, as the record states them
A drill or a real incident in which payments and authentication keep working at throttled capacity
Assessment effectshows the failing layer fixed.
A cable incident attributed by the operator or the coast guard to a named vessel with the evidence published
Assessment effectmoves attribution from contested to established for the first time.
Observables5 named · “met” describes evidence, not success
01Test
Cable incidents and repair times
Each incident with its date, the cable, the repair time and the attribution as stated — never inferred — by the operator or the coast guard.
02Test
Published findings from the continuity drills
Whether the government publishes what the throttling drills found and what it changed in response, beyond the layers already reported.
03Test
Payment and authentication continuity under throttling
The layer that failed in August: whether any subsequent drill or measure keeps payments, banking or ticketing working at one per cent of capacity.
04Test
Non-cable backup capacity in service
Satellite or microwave capacity commissioned and tested, as distinct from announced.
05Test
Grid incidents and their attribution
Reported grid failures with cause stated, kept apart from cable events.
Review ledger13 entries · opened · newest first, each tied to the review that made it
No material change
No cable incident found. Typhoon Champi cut power to about 77,000 households on 23 October, by the operator's count, with no cascade reported. No payment-continuity measure or drill found. The Philippines said on 21 October it is exploring cable-protection cooperation with Taiwan, with no agreement. The third Matsu cable repair is still not verified.
Weekly Brief Taiwan Strait developments — 25 October 2026
No material change
No cable or grid incident found for the window. Whether the third Matsu cable has been repaired is still not verified. The check was limited.
Weekly Brief Taiwan Strait developments — 18 October 2026
No material change
No cable or grid incident found. Whether the third Matsu cable has been repaired is still not verified; the fourth Matsu cable has been in service since 18 September. The check was limited.
Weekly Brief Taiwan Strait developments — 11 October 2026
Movement observed
Found late: the third Taiwan–Matsu cable was damaged off Dongyin in early April 2026 and broke there on 29 April; the digital ministry cited old wreckage moved by heavy seas, and Dongyin ran on microwave. No in-window incident; Manila reported a Chinese survey ship holding station near Luzon Strait cable corridors.
Weekly Brief Taiwan Strait developments — 4 October 2026
Movement observed
Found late and recorded now. A fourth Taiwan–Matsu submarine cable, 294 km long, was put into service at a ceremony on 18 September, on a route whose cables were cut together in 2023, and the premier stated that microwave and low-orbit satellite capacity to the islands is being expanded. Redundancy added, not tested. No cable incident, no drill findings, nothing on payment continuity or satellite capacity in service, and no grid incident from 20 to 26 September.
Brief item A fourth cable to Matsu adds redundancy to the link that was cut in 2023, which is resilience added and not yet testedReviewed in 2026-09-27
No material change
Checked. No cable incident reported, no drill findings published, nothing on payment continuity or satellite backup and no grid incident in the window.
Weekly Brief Taiwan Strait developments — 20 September 2026
No material change
No new undersea-cable incident, grid event or civil-systems disruption was identified in the window, and no further drill was announced.
Weekly Brief Taiwan Strait developments — 13 September 2026
No material change
No new undersea-cable or grid incident identified during the window.
Weekly Brief Taiwan Strait developments — 6 September 2026
No material change
No new undersea-cable or grid incident identified during the window.
Weekly Brief Taiwan Strait developments — 30 August 2026
No material change
No new undersea-cable or grid incident identified during the window.
Weekly Brief Taiwan Strait developments — 23 August 2026
Movement observed
The throttling drills of 10 and 13 August produced the first published test of which civil layers survive a data cut. No cable or grid incident identified.
Event The throttling exercise repeats across northern TaiwanWeekly Brief Taiwan Strait developments — 16 August 2026
No material change
No new undersea-cable or grid incident identified during the window.
Weekly Brief Taiwan Strait developments — 9 August 2026
Baseline
Opened from the module's standing question at its first weekly review under the label "Cable and infrastructure incidents".
Weekly Brief Taiwan Strait developments — 2 August 2026
Connected system21 canonical records this question runs through · Watch owns the edge; each record shows the question back
Parties and forces 5
Actors
Means and systems 4
Campaigns
Ground 4
Arrangements and events 4
Relationships
Vigil analysis 5
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Assessed as of — 2026-09-06 Last reviewed — 2026-10-25
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