From Clusters to Structure: Mapping Active Faults with Relocated Seismicity

Starts:  19 February 2026  16: 00

Ends:   19 February 2026   17:00

Central Africa Time (CAT)

Speaker:

Dr. Blaž Vičič

Slovenian Environment Agency, Seismology Office

Abstract:

Comprehensive earthquake catalogs are one of the foundational datasets for tectonic analysis and seismic hazard assessment. However, conventional location algorithm methodology, which typically employs a one dimensional velocity model and automated phase identification, frequently generates diffuse hypocentral distribution that fails to resolve fine scale geological structures. This seminar examines the systematic transformation from initial, spatially dispersed seismic cluster configuration to well defined fault geometry through application of high precision relocation methodology.

Relocated hypocenter solutions will be systematically compared with routine catalogs to quantify improvement in spatial resolution. Representative case study analysis will demonstrate how this refined relocation workflow enables the delineation of active fault geometry that remains unresolved in conventional catalog analysis.

Enhanced structural resolution derived from high precision relocation methodology represents a critical advancement for characterizing active tectonic processes and refining probabilistic seismic hazard assessment. The ability to resolve discrete fault plane geometry from diffuse seismicity patterns provides essential constraints on fault system geometry, kinematics, and seismogenic potential that cannot be obtained from conventional catalog analysis.

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