Microearthquake Seismicity on the Duke River Fault, 1987

146 earthquakes were detected by a seven-station seismograph array operating on the Duke River Fault between May and August 1987. The Government of Yukon study located 44 events, delineating three distinct seismic zones and linking the Totschunda and Duke River Fault segments. Data includes epicenter distributions, S-P times, and focal plane solutions for the western Denali Fault System.

Use Cases

• Map seismic zones and fault structures based on epicenter distributions and S-P times.
• Analyze fault mechanics based on composite focal plane solutions suggesting oblique thrusting.
• Model crustal stress and deformation based on shallow and midcrustal microearthquake focii beneath Tertiary cover structures.
• Correlate historical seismicity with newly delineated faults, such as the 40 km long unmapped fault south of the Duke River Fault.

Strengths

• Contains data for 146 detected earthquakes, with 44 precisely located.
• Defines three specific seismic zones with geological context, including a 15 km wide central zone.
• Time-bounded study from May 22 to August 13, 1987, providing a focused temporal snapshot.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count for the full catalog is unknown, which may limit suitability assessment.
• Data is from a specific 3-month period in 1987; temporal coverage is limited.

Provenance

Source

Government of Yukon

Collection Method

Data collected by a seven-station seismograph array operated at two sites.

Time Range

May 22, 1987 to August 13, 1987

Freshness

Last updated 2026-04-17 16:08:12.183249; freshness should be verified.

Geography

Western segment of the Duke River Fault, Denali Fault System, Yukon, Canada