Ned Field
Ned (Edward) Field is a Research Geophysicist with the Earthquake Hazards Program.
Ned Field coordinates and leads the development of earthquake forecast models for the USGS Earthquake Hazards Program. These forecasts, coupled with ground-motion models, form the basis of modern seismic hazard and risk analyses. Their development is multidisciplinary and collaborative (a "systems science" problem) in that information from a broad range of disciplines (e.g., seismology, geodesy, geology, paleoseismology, and earthquake physics) must reconciled.
Recent accomplishments and ongoing challenges involve representation of multi-fault ruptures and spatiotemporal clustering (e.g., aftershocks), improved uncertainty estimates, applying more physics-based approaches, and the need to add "valuation" to our verification and validation protocols (i.e., a greater focus on usefulness). Ned is also involved in developing and deploying end-to-end seismic hazard and risk computational platforms. The resultant models influence a variety of risk mitigation activities, including construction requirements (building codes) and earthquake insurance rates.
Science and Products
A-priori rupture models for Northern California Type-A faults
Development of final a-fault rupture models for WGCEP/ NSHMP Earthquake Rate Model 2
Forecasting California's earthquakes— What can we expect in the next 30 years?
Documentation for the 2008 update of the United States National Seismic Hazard Maps
Grid computing in the SCEC community modeling environment
Hazard calculations for the WGCEP-2002 earthquake forecast using OpenSHA and distributed object technologies
Earthquake shaking — Finding the "hot spots"
Earthquake ground-motion amplification in Southern California
The variability of PSV response spectra across a dense array deployed during the Northridge aftershock sequence
Ground motion
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.
Science and Products
A-priori rupture models for Northern California Type-A faults
Development of final a-fault rupture models for WGCEP/ NSHMP Earthquake Rate Model 2
Forecasting California's earthquakes— What can we expect in the next 30 years?
Documentation for the 2008 update of the United States National Seismic Hazard Maps
Grid computing in the SCEC community modeling environment
Hazard calculations for the WGCEP-2002 earthquake forecast using OpenSHA and distributed object technologies
Earthquake shaking — Finding the "hot spots"
Earthquake ground-motion amplification in Southern California
The variability of PSV response spectra across a dense array deployed during the Northridge aftershock sequence
Ground motion
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.