Low Dissipation of Earthquake Energy Where a Fault Follows Pre‐Existing Weaknesses: Field and Microstructural Observations of Malawi’s Bilila‐Mtakataka Fault

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Title

Low Dissipation of Earthquake Energy Where a Fault Follows Pre‐Existing Weaknesses: Field and Microstructural Observations of Malawi’s Bilila‐Mtakataka Fault

Content partner

University of Otago

Collection

Otago University Research Archive

Description

During earthquakes on low (<1–2 km) displacement faults in isotropic crust, more earthquake energy is consumed by fracturing and gouge formation than in ruptures along more mature faults. To investigate how pre‐existing weaknesses affect earthquake energy dissipation along low displacement faults, we studied fault rocks from the 110 km long, 0.4–1.2 km displacement, Bilila‐Mtakataka Fault (BMF), Malawi. Where the BMF is parallel to surface metamorphic fabrics, macroscale fractures define a na...

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Format

Research paper

Research format

Scholarly text / Journal article

Thesis level

Article

Date created

2022-04-28

Creator

Williams, Jack N. / Fagereng, Åke / Wedmore, Luke N. J. / Biggs, Juliet / Mdala, Hassan / Mphepo, Felix / Hodge, Michael

URL

https://hdl.handle.net/10523/21957

Related subjects

damage zone / earthquake energy balance / East African rift / fault growth / fault zone / normal fault

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