Effects of the 1975 Bougainville Earthquake and Tsunami

A magnitude 7.9 earthquake on 20 July 1975 caused at least $300,000 in damage and generated a two-metre tsunami in the Solomon Islands. The Australian Ocean Data Network provides a detailed report on resulting landslides, liquefaction, and damage to villages and mining infrastructure. The report includes analysis of aftershocks over a 12,500 square kilometre area and discusses the earthquake's tectonic context and future seismic risk.

Use Cases

• Modeling tsunami impact and coastal damage based on the reported two-metre wave amplitude.
• Analyzing patterns of secondary earthquake effects like landslides and liquefaction described in the report.
• Studying aftershock distribution and fault mechanics based on the described 12,500 square kilometre elliptical area.
• Assessing future seismic risk based on the identified aseismic zone mentioned in the description.

Strengths

• Provides a detailed factual account of a specific major seismic event, including a precise date (20 July 1975) and magnitude (MS7.9).
• Includes quantified damage estimates ($300,000 Australian) and physical measurements (tsunami amplitude of about two metres).
• Describes the geological context with specific parameters like fault dip (~37°) and aftershock area (12,500 sq km).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is provided in PDF/HTML report formats, which may require extraction for computational analysis.

Provenance

Source

Australian Ocean Data Network

Collection Method

Likely a compiled scientific report or analysis.

Time Range

Focused on the 20 July 1975 event and its immediate aftermath.

Freshness

Last updated 2026-04-10 18:41:03.143026; freshness should be verified.

Geography

Northern Solomon Islands, specifically the Bougainville/Shortland Islands region and surrounding sea.