Supershear Rupture, Daughter Cracks, and the Definition of Rupture Velocity

Abstract

The speed with which earthquake rupture propagates along a fault is strongly related to both the pattern and amplitude of near-source and far-field ground motion. A growing number of observations of primarily strike-slip earthquakes (

A Travel‐Time Path Calibration Strategy for Back‐Projection of Large Earthquakes and Its Application and Validation Through the Segmented Super‐Shear Rupture Imaging of the 2002 Mw 7.9 Denali Earthquake

“…In dynamic modeling, more detailed definitions of the rupture speed have been introduced to better describe the rupture history (e.g., Hu et al, 2021;Kaneko & Lapusta, 2010). For example, Hu et al (2021) proposed using very local rupture speed (i.e., the rupture speed at a point the fault) may more reliably reflect the nature of the super-shear rupture generated in a scenario with vertical heterogenous stress distribution. These rupture speeds may not be resolved without very near-field observations.…”

“…The speed we resolved for the Denali rupture is the average speed between the location of HF radiation clusters. In dynamic modeling, more detailed definitions of the rupture speed have been introduced to better describe the rupture history (e.g., Hu et al., 2021; Kaneko & Lapusta, 2010). For example, Hu et al.…”

“…For example, Hu et al. (2021) proposed using very local rupture speed (i.e., the rupture speed at a point on the fault) may more reliably reflect the nature of the super‐shear rupture generated in a scenario with vertical heterogenous stress distribution. These rupture speeds may not be resolved without very near‐field observations.…”

A Travel-time Path Calibration Strategy for Back-Projection of Large Earthquakes and Its Application and Validation through the Segmented Super-Shear Rupture Imaging of the 2002 Mw7.9 Denali earthquake

“…In dynamic modeling, more detailed definitions of the rupture speed have been introduced to better describe the rupture history (e.g., Hu et al, 2021;Kaneko & Lapusta, 2010). For example, Hu et al (2021) proposed using very local rupture speed (i.e., the rupture speed at a point on the fault) may more reliably reflect the nature of the super-shear rupture generated in a scenario with vertical heterogenous stress distribution. These rupture speeds may not be resolved without very near-field observations.…”