Publications
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Simulated ground-motion records for the seismic assessment of monumental masonry structures Simulated ground-motion records for the seismic assessment of monumental masonry structures
Earthquakes are natural disasters that can cause widespread devastation and loss of life. Simulated ground-motion records can be useful in regions with limited seismic stations or a history of damaging but infrequent earthquakes. This is especially true in areas with a high concentration of heritage masonry structures, which are especially susceptible to damage, as simulated records can...
Authors
Shaghayegh Karimzadeh, Marco F. Funari, Simon Szabó, S. M. Sajad Hussaini, Sanaz Rezaeian, Paulo B. Lourenço
Seismic response comparison of a historical masonry church subject to real and simulated ground motions Seismic response comparison of a historical masonry church subject to real and simulated ground motions
In recent years, advanced numerical models and high-performance computing have facilitated the utilization of ground motion time series in the assessment of the non-linear dynamic behavior of historic masonry structures. Since recorded accelerograms can be sparse for specific analysis conditions, stochastic ground motion simulations have become a viable alternative to overcome this...
Authors
S. M. Sajad Hussaini, Claudio Sebastiani, Monica Capasso, Valerio Sabbatini, Shaghayegh Karimzadeh, Sanaz Rezaeian, Silvia Santini, Paulo B. Lourenço
Limited preservation of strike-slip surface displacement in the geomorphic record Limited preservation of strike-slip surface displacement in the geomorphic record
Offset geomorphic markers are commonly used to interpret slip history of strike-slip faults and have played an important role in forming earthquake recurrence models. These data sets are typically analyzed using cumulative probability methods to interpret average amounts of slip in past earthquakes. However, interpretation of the geomorphic record to infer surface slip history is...
Authors
Nadine G. Reitman, Yann Klinger, Richard W. Briggs, Ryan D. Gold
Perspectives on transportable array Alaska background noise levels Perspectives on transportable array Alaska background noise levels
Background seismic noise fundamentally sets a lower bound on our ability to record signals arising from earthquakes. The background noise spectrum at a station is a combination of cultural noise, ocean-generated microseism noise, intrinsic instrument self-noise, and the sensitivity of the instrument to nonseismic noise sources. The USArray-Transportable Array Alaska deployed 195 stations...
Authors
Adam T. Ringler, Kasey Aderhold, Robert E. Anthony, Robert W. Busby, Andy Frassetto, Toshiro Tanimoto, David C. Wilson
Using crustal-scale refraction data of joint inversions of Rayleigh-wave dispersion curves and H/V spectral ratios for Atlantic Coastal Plain velocity structure, eastern U.S. Using crustal-scale refraction data of joint inversions of Rayleigh-wave dispersion curves and H/V spectral ratios for Atlantic Coastal Plain velocity structure, eastern U.S.
Shallow shear‐wave velocities ( Vs) sometimes are estimated from joint inversions of horizontal‐to‐vertical (H/V) spectral ratios and surface‐wave dispersion curves derived from ambient noise or small active sources. Here, we evaluate carrying out these inversions using Rayleigh‐wave dispersion curves computed from crustal‐scale P‐wave seismic refraction data. We use data from the 2014...
Authors
Thomas Pratt, Stefano Parolai, Valerio Poggi, Ilaria Dreossi
Shallow lake, strong shake: Record of seismically triggered lacustrine sedimentation from the 1959 M7.3 Hebgen Lake earthquake within Henrys Lake, Idaho Shallow lake, strong shake: Record of seismically triggered lacustrine sedimentation from the 1959 M7.3 Hebgen Lake earthquake within Henrys Lake, Idaho
We investigate a shallow lake basin for evidence of a large historic intraplate earthquake in western North America. Henrys Lake, Idaho is an atypical candidate for a lacustrine paleoseismic study given its shallow depth (~7 m) and low relief (≤2° slopes). Here, we test the earthquake-recording capacity of this basin type by showing sedimentological evidence of the 1959 M7.3 Hebgen Lake...
Authors
Sylvia R. Nicovich, Christopher DuRoss, Jessica Ann Thompson Jobe, Jessica R. Rodysill, Richard W. Briggs, Alexandra Elise Hatem, Madeleine Mai-Lynh Tan, Yann Gavillot, Noah Silas Lindberg, Laura E. Strickland, Jason Scott Padgett
Before the fire: Predicting burn severity and potential post-fire debris-flow hazards to Colorado River Cutthroat Trout (Oncorhynchus clarkii pleuriticus) conservation populations Before the fire: Predicting burn severity and potential post-fire debris-flow hazards to Colorado River Cutthroat Trout (Oncorhynchus clarkii pleuriticus) conservation populations
Background Colorado River Cutthroat Trout (CRCT; Oncorhynchus clarkii pleuriticus) conservation populations may be at risk from wildfire and post-fire debris flows hazards. Aim To predict burn severity and potential post-fire debris flow hazard classifications to CRCT conservation populations before wildfires occur. Methods We used remote sensing, spatial analyses, and machine learning...
Authors
Adam Gerhard Wells, Charles Yackulic, Jaime Kostelnik, Andrew R. Bock, Robert E. Zuellig, Daren M. Carlisle, James Roberts, Kevin B. Rogers, Seth M. Munson
Trimming the UCERF3-TD logic tree: Model order reduction for an earthquake rupture forecast considering loss exceedance Trimming the UCERF3-TD logic tree: Model order reduction for an earthquake rupture forecast considering loss exceedance
The Uniform California Earthquake Rupture Forecast version 3-Time Dependent depicts California’s seismic faults and their activity. Its logic tree has 5760 leaves. Considering 30 more model combinations related to ground motion produces 172,800 distinct models representing so-called epistemic uncertainties. To calculate risk to a portfolio of buildings, one also considers millions of...
Authors
Keith Porter, Kevin R. Milner, Edward H. Field
A decade of shaking in the Garden City: The dynamics of preparedness, perceptions, and beliefs in Canterbury, New Zealand, and implications for earthquake information A decade of shaking in the Garden City: The dynamics of preparedness, perceptions, and beliefs in Canterbury, New Zealand, and implications for earthquake information
This study explored earthquake preparedness over time - before, during, and 10 years after the Canterbury Earthquake Sequence (CES) in Aotearoa New Zealand (NZ). Surveys of Canterbury residents were conducted in 2009, 2013 and again in 2021, using variables derived from Community Engagement Theory (CET). The surveys measured earthquake perceptions and beliefs, participation and...
Authors
Julia S. Becker, Emma E. Hudson-Doyle, Lauren Vinnell, Sara K. McBride, Douglas Paton, David A. Johnston
Evaluating the impact of uncertainty in ground motion forecasts for post-earthquake impact modeling applications Evaluating the impact of uncertainty in ground motion forecasts for post-earthquake impact modeling applications
The US Geological Survey’s (USGS) ShakeMap system provides a rapid characterization of strong ground shaking in areas directly affected by an earthquake. This study focuses on studying the aggregate effects of macroseismic shaking estimates from ShakeMap, expressed in terms of modified Mercalli intensity (MMI), when accounting for the uncertainty in forecasted ground motions. We use a...
Authors
Davis T. Engler, Kishor S. Jaiswal, Mahadevan Ganesh
The solar cycle, geology, and geoelectric hazards for power grids The solar cycle, geology, and geoelectric hazards for power grids
When sunspots are large and numerous, intense magnetic storms are likely to occur on the Earth. Magnetic storms can generate electric fields in the Earth, and these fields can, in turn, interfere with electric power transmission grids that are grounded at the Earth’s surface. Across the contiguous United States, geoelectric hazards are highest in the Upper Midwest and in the East. These...
Authors
Jeffrey J. Love, Steven Sobieszczyk, E. Joshua Rigler, Anna Kelbert, Kristen A. Lewis
A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days
Climate change is increasingly predisposing polar regions to large landslides. Tsunamigenic landslides have occurred recently in Greenland (Kalaallit Nunaat), but none have been reported from the eastern fjords. In September 2023, we detected the start of a 9-day-long, global 10.88-millihertz (92-second) monochromatic very-long-period (VLP) seismic signal, originating from East Greenland...
Authors
Kristian Svennevig, Steven P. Hicks, Thomas Forbriger, Thomas Lecocq, Ruedi Widmer-Schnidrig, Anne Mangeney, Clément Hibert, Niels J. Korsgaard, Antoine S. Lucas, Claudio Satriano, Robert E. Anthony, Aurélien Mordret, Sven Schippkus, Søren Rysgaard, Wieter Boone, Steven Gibbons, Kristen L. Cook, Sylfest Glimsdal, Finn Løvholt, Koen Van Noten, Jelle D. Assink, Alexis Marboeuf, Anthony Lomax, Kris Vanneste, Taka’aki Taira, Matteo Spagnolo, Raphael de Plaen, Paula Koelemeijer, Carl Ebeling, Andrea Cannata, William D. Hardcourt, David G. Cornwell, Corentin Caudron, Piero Poli, Pascal Bernard, Eric Larose, Eleonore Stutzmann, Peter H. Voss, Bjorn Lund, Flavio Cannavo, Manuel J. Castro-Díaz, Esteban J. Chaves, Trine Dahl-Jensen, Nicolas De Pinho Dias, Aline Deprez, Roeland Develter, Douglas Dreger, Laslo G. Evers, Enrique D. Fernández-Nieto, Ana M.G. Ferreira, Gareth J. Funning, Alice-Agnes Gabriel, Marc Hendrickx, Alan L. Kafka, Marie Keiding, Jeffrey T. Kerby, Shfaqat A. Khan, Andreas Kjær Dideriksen, Oliver D. Lamb, Tine B. Larsen, Bradley Lipovsky, Ikha Magdalena, Jean-Philippe Malet, Mikkel Myrup, Luis Rivera, Eugenio Ruiz-Castillo, Selina Wetter, Bastien Wirtz