Tsunami Hazard Scenarios for the Tonga-Kermadec Subduction Zone

A UNESCO Intergovernmental Oceanographic Commission workshop report synthesizes expert-identified seismic scenarios for the Tonga-Kermadec trench. The report, published by the Australian Ocean Data Network, presents potential worst-case tsunami sources ranked by probability. It also discusses gaps in scientific knowledge, regional instrumentation, and tsunami readiness for at-risk populations.

Use Cases

• Modeling tsunami inundation based on the expert-identified seismic scenarios.
• Assessing regional tsunami risk and preparedness based on the workshop's findings on instrumentation and readiness.
• Prioritizing seismic monitoring efforts based on the ranked probability of tectonic events.
• Informing civil defense and emergency management planning for Pacific Island countries.

Strengths

• Based on a 2018 workshop of fourteen experts from four countries, providing a multi-disciplinary perspective.
• Focuses on a specific, high-risk tectonic region: the Tonga-Kermadec Subduction Zone.
• Scenarios are ranked by probability (low, medium, high) by domain experts.

Limitations

• Data format is HTML, likely a report; structured, machine-readable data may not be present.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Australian Ocean Data Network, based on a UNESCO/IOC Pacific Tsunami Warning System workshop.

Collection Method

Expert workshop synthesis; state-of-the-science knowledge of local tectonics used to identify scenarios.

Time Range

Workshop held in November 2018.

Freshness

Last updated 2026-04-16 09:26:26.368730; freshness should be verified.

Geography

Tonga-Kermadec Subduction Zone and nearby coastlines, including Pacific Island countries like Tonga and Fiji.