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Nicolas Luco

Nico is a Research Civil Engineer in the Earthquake Hazards Program.

Science and Products

A risk map of the 50-state NSHM 2023 update showing the greater than MMI6 for chance of damaging shaking within 100 years.

USGS National Seismic Hazard Model User-Needs Workshop

The National Seismic Hazard Model Project (NSHMP) will be summarizing the 2023 National Seismic Hazard Model (NSHM) and presenting a preliminary future vision for the 2029 NSHM release. Day 1 will consist primarily of presentations as well as discussion and questions, and Day 2 will be focused on user participation.
By
Earthquake Hazards Program, Geologic Hazards Science Center
USGS National Seismic Hazard Model User-Needs Workshop

USGS National Seismic Hazard Model User-Needs Workshop

The National Seismic Hazard Model Project (NSHMP) will be summarizing the 2023 National Seismic Hazard Model (NSHM) and presenting a preliminary future vision for the 2029 NSHM release. Day 1 will consist primarily of presentations as well as discussion and questions, and Day 2 will be focused on user participation.
Learn More
No Result Found
Filter Total Items: 79

Introduction: Special issue on earthquake ground-motion selection and modification for nonlinear dynamic analysis of structures Introduction: Special issue on earthquake ground-motion selection and modification for nonlinear dynamic analysis of structures

No abstract available.
Authors
Erol Kalkan, Nico Luco
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center, Geologic Hazards Science Center

Direct calculation of the probability distribution for earthquake losses to a portfolio Direct calculation of the probability distribution for earthquake losses to a portfolio

We demonstrate a direct method for the calculation of the annual frequency of exceedance for earthquake losses (or the probability distribution for annual losses) to a portfolio. This method parallels the classic method of probabilistic seismic hazard analysis for the calculation of the annual frequency of exceedance for earthquake ground motions. The method assumes conditional...
Authors
Robert L. Wesson, David M. Perkins, Nico Luco, Erdem Karaca
By
Natural Hazards Mission Area, Geologic Hazards Science Center

Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California

In a letter to the U.S. Geological Survey (USGS) dated March 25, 2008, Representative Jane Harman (California 36th district) requested advice on geologic hazards that should be considered in the review of a proposed liquefied natural gas (LNG) facility off the California coast in Santa Monica Bay. In 2004, the USGS responded to a similar request from Representative Lois Capps, regarding...
Authors
Stephanie L. Ross, Homa J. Lee, Tom E. Parsons, Larry A. Beyer, David M. Boore, James E. Conrad, Brian D. Edwards, Michael A. Fisher, Arthur D. Frankel, Eric L. Geist, Kenneth W. Hudnut, Susan E. Hough, Robert E. Kayen, T.D. Lorenson, Nicolas Luco, Patricia A. McCrory, Mary McGann, Manuel Nathenson, Michael Nolan, Mark D. Petersen, Daniel J. Ponti, Charles L. Powell, Holly F. Ryan, John C. Tinsley, Chris J. Wills, Florence L. Wong, Jingping Xu
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Maximum spectral demands in the near-fault region Maximum spectral demands in the near-fault region

The Next Generation Attenuation (NGA) relationships for shallow crustal earthquakes in the western United States predict a rotated geometric mean of horizontal spectral demand, termed GMRotI50, and not maximum spectral demand. Differences between strike-normal, strike-parallel, geometric-mean, and maximum spectral demands in the near-fault region are investigated using 147 pairs of...
Authors
Yin-Nan Huang, Andrew S. Whittaker, Nicolas Luco
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Converting HAZUS capacity curves to seismic hazard-compatible building fragility functions: effect of hysteretic models Converting HAZUS capacity curves to seismic hazard-compatible building fragility functions: effect of hysteretic models

A methodology was recently proposed for the development of hazard-compatible building fragility models using parameters of capacity curves and damage state thresholds from HAZUS (Karaca and Luco, 2008). In the methodology, HAZUS curvilinear capacity curves were used to define nonlinear dynamic SDOF models that were subjected to the nonlinear time history analysis instead of the capacity...
Authors
Hyeuk Ryu, Nicolas Luco, Jack W. Baker, Erdem Karaca
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Documentation for the 2008 update of the United States National Seismic Hazard Maps Documentation for the 2008 update of the United States National Seismic Hazard Maps

The 2008 U.S. Geological Survey (USGS) National Seismic Hazard Maps display earthquake ground motions for various probability levels across the United States and are applied in seismic provisions of building codes, insurance rate structures, risk assessments, and other public policy. This update of the maps incorporates new findings on earthquake ground shaking, faults, seismicity, and...
Authors
Mark D. Petersen, Arthur D. Frankel, Stephen C. Harmsen, Charles S. Mueller, Kathleen M. Haller, Russell L. Wheeler, Robert L. Wesson, Yuehua Zeng, Oliver S. Boyd, David M. Perkins, Nicolas Luco, Edward H. Field, Chris J. Wills, Kenneth S. Rukstales
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Risk-targeted versus current seismic design maps for the conterminous United States Risk-targeted versus current seismic design maps for the conterminous United States

The probabilistic portions of the seismic design maps in the NEHRP Provisions (FEMA, 2003/2000/1997), and in the International Building Code (ICC, 2006/2003/2000) and ASCE Standard 7-05 (ASCE, 2005a), provide ground motion values from the USGS that have a 2% probability of being exceeded in 50 years. Under the assumption that the capacity against collapse of structures designed for these
Authors
Nicolas Luco, Bruce R. Ellingwood, Ronald O. Hamburger, John D. Hooper, Jeffrey K. Kimball, Charles A. Kircher
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center
Hazard map from the 2023 50-state update of the National Seismic Hazard Model Project

New USGS map shows where damaging earthquakes are most likely to occur in US New USGS map shows where damaging earthquakes are most likely to occur in US

USGS scientists and our partners recently revealed the latest National Seismic Hazard Model, showing that nearly 75% of the United States could experience a damaging earthquake, emphasizing seismic hazards span a significant part of the country.
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center, Geologic Hazards Science Center, Communications and Publishing

Science and Products

A risk map of the 50-state NSHM 2023 update showing the greater than MMI6 for chance of damaging shaking within 100 years.

USGS National Seismic Hazard Model User-Needs Workshop

The National Seismic Hazard Model Project (NSHMP) will be summarizing the 2023 National Seismic Hazard Model (NSHM) and presenting a preliminary future vision for the 2029 NSHM release. Day 1 will consist primarily of presentations as well as discussion and questions, and Day 2 will be focused on user participation.
By
Earthquake Hazards Program, Geologic Hazards Science Center
USGS National Seismic Hazard Model User-Needs Workshop

USGS National Seismic Hazard Model User-Needs Workshop

The National Seismic Hazard Model Project (NSHMP) will be summarizing the 2023 National Seismic Hazard Model (NSHM) and presenting a preliminary future vision for the 2029 NSHM release. Day 1 will consist primarily of presentations as well as discussion and questions, and Day 2 will be focused on user participation.
Learn More
No Result Found
Filter Total Items: 79

Introduction: Special issue on earthquake ground-motion selection and modification for nonlinear dynamic analysis of structures Introduction: Special issue on earthquake ground-motion selection and modification for nonlinear dynamic analysis of structures

No abstract available.
Authors
Erol Kalkan, Nico Luco
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center, Geologic Hazards Science Center

Direct calculation of the probability distribution for earthquake losses to a portfolio Direct calculation of the probability distribution for earthquake losses to a portfolio

We demonstrate a direct method for the calculation of the annual frequency of exceedance for earthquake losses (or the probability distribution for annual losses) to a portfolio. This method parallels the classic method of probabilistic seismic hazard analysis for the calculation of the annual frequency of exceedance for earthquake ground motions. The method assumes conditional...
Authors
Robert L. Wesson, David M. Perkins, Nico Luco, Erdem Karaca
By
Natural Hazards Mission Area, Geologic Hazards Science Center

Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California

In a letter to the U.S. Geological Survey (USGS) dated March 25, 2008, Representative Jane Harman (California 36th district) requested advice on geologic hazards that should be considered in the review of a proposed liquefied natural gas (LNG) facility off the California coast in Santa Monica Bay. In 2004, the USGS responded to a similar request from Representative Lois Capps, regarding...
Authors
Stephanie L. Ross, Homa J. Lee, Tom E. Parsons, Larry A. Beyer, David M. Boore, James E. Conrad, Brian D. Edwards, Michael A. Fisher, Arthur D. Frankel, Eric L. Geist, Kenneth W. Hudnut, Susan E. Hough, Robert E. Kayen, T.D. Lorenson, Nicolas Luco, Patricia A. McCrory, Mary McGann, Manuel Nathenson, Michael Nolan, Mark D. Petersen, Daniel J. Ponti, Charles L. Powell, Holly F. Ryan, John C. Tinsley, Chris J. Wills, Florence L. Wong, Jingping Xu
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Maximum spectral demands in the near-fault region Maximum spectral demands in the near-fault region

The Next Generation Attenuation (NGA) relationships for shallow crustal earthquakes in the western United States predict a rotated geometric mean of horizontal spectral demand, termed GMRotI50, and not maximum spectral demand. Differences between strike-normal, strike-parallel, geometric-mean, and maximum spectral demands in the near-fault region are investigated using 147 pairs of...
Authors
Yin-Nan Huang, Andrew S. Whittaker, Nicolas Luco
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Converting HAZUS capacity curves to seismic hazard-compatible building fragility functions: effect of hysteretic models Converting HAZUS capacity curves to seismic hazard-compatible building fragility functions: effect of hysteretic models

A methodology was recently proposed for the development of hazard-compatible building fragility models using parameters of capacity curves and damage state thresholds from HAZUS (Karaca and Luco, 2008). In the methodology, HAZUS curvilinear capacity curves were used to define nonlinear dynamic SDOF models that were subjected to the nonlinear time history analysis instead of the capacity...
Authors
Hyeuk Ryu, Nicolas Luco, Jack W. Baker, Erdem Karaca
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Documentation for the 2008 update of the United States National Seismic Hazard Maps Documentation for the 2008 update of the United States National Seismic Hazard Maps

The 2008 U.S. Geological Survey (USGS) National Seismic Hazard Maps display earthquake ground motions for various probability levels across the United States and are applied in seismic provisions of building codes, insurance rate structures, risk assessments, and other public policy. This update of the maps incorporates new findings on earthquake ground shaking, faults, seismicity, and...
Authors
Mark D. Petersen, Arthur D. Frankel, Stephen C. Harmsen, Charles S. Mueller, Kathleen M. Haller, Russell L. Wheeler, Robert L. Wesson, Yuehua Zeng, Oliver S. Boyd, David M. Perkins, Nicolas Luco, Edward H. Field, Chris J. Wills, Kenneth S. Rukstales
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Risk-targeted versus current seismic design maps for the conterminous United States Risk-targeted versus current seismic design maps for the conterminous United States

The probabilistic portions of the seismic design maps in the NEHRP Provisions (FEMA, 2003/2000/1997), and in the International Building Code (ICC, 2006/2003/2000) and ASCE Standard 7-05 (ASCE, 2005a), provide ground motion values from the USGS that have a 2% probability of being exceeded in 50 years. Under the assumption that the capacity against collapse of structures designed for these
Authors
Nicolas Luco, Bruce R. Ellingwood, Ronald O. Hamburger, John D. Hooper, Jeffrey K. Kimball, Charles A. Kircher
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center
Hazard map from the 2023 50-state update of the National Seismic Hazard Model Project

New USGS map shows where damaging earthquakes are most likely to occur in US New USGS map shows where damaging earthquakes are most likely to occur in US

USGS scientists and our partners recently revealed the latest National Seismic Hazard Model, showing that nearly 75% of the United States could experience a damaging earthquake, emphasizing seismic hazards span a significant part of the country.
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center, Geologic Hazards Science Center, Communications and Publishing
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