Ground‐Motion Simulations of 1811–1812 New Madrid Earthquakes, Central United States

2015/07/30 by L. Ramirez-Guzmán, Robert Graves, K. B. Olsen +7 · 1 voice
Engineering · Earth and Planetary Sciences · #Seismic Performance and Analysis #earthquake and tectonic studies #Seismic Waves and Analysis

paper · doi:10.1785/0120140330

openalex publication_date 2015/07/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11

Abstract

Abstract We performed a suite of numerical simulations based on the 1811–1812 New Madrid seismic zone (NMSZ) earthquakes, which demonstrate the importance of 3D geologic structure and rupture directivity on the ground-motion response through-out a broad region of the central United States (CUS) for these events. Our simulation set consists of 20 hypothetical earthquakes located along two faults associated with the current seismicity trends in the NMSZ. The hypothetical scenarios range in mag-nitude from M 7.0 to 7.7 and consider various epicenters, slip distributions, and rup-ture characterization approaches. The low-frequency component of our simulations was computed deterministically up to a frequency of 1 Hz using a regional 3D seismic velocity model and was combined with higher-frequency motions calculated for a 1D medium to generate broadband synthetics (0–40 Hz in some cases). For strike-slip earthquakes located on the southwest–northeast-striking NMSZ axial arm of seismic-ity, our simulations show 2–10 s period energy channeling along the trend of the Reel-foot rift and focusing strong shaking northeast toward Paducah, Kentucky, and

Citations

• A note on the dynamic and static displacements from a point source in multilayered media
• Tectonic Deformation in the New Madrid Seismic Zone: Inferences from Boundary Element Modeling
• New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement
• Cataloging the 1811-1812 New Madrid, Central U.S., Earthquake Sequence
• Broadband Ground-Motion Simulation Using a Hybrid Approach
• Hybrid Empirical Ground-Motion Prediction Equations for Eastern North America Using NGA Models and Updated Seismological Parameters
• Magnitudes and Locations of the 1811-1812 New Madrid, Missouri, and the 1886 Charleston, South Carolina, Earthquakes
• Seismic moment assessment of earthquakes in stable continental regions-III. New Madrid 1811-1812, Charleston 1886 and Lisbon 1755
• Earthquake Ground-Motion Prediction Equations for Eastern North America
• Ground-motion relations for eastern North America
• Modifications to Existing Ground-Motion Prediction Equations in Light of New Data

Discussions

• ⭐️Ground‐Motion Simulations of 1811–1812 New Madrid Earthquakes, Central United States, L. Ramirez-Guzman et al. (2015), doi.org/10.1785/0120... Available until Jan. 3, 2024 #BSSA (9/n) [bsky, 0 points, 1 comments]