Lisa A Wald (Former Employee)
Science and Products
Filter Total Items: 34
Preserving Historic Earthquake Records and Photos of the Instruments that Recorded Them
Release Date: FEBRUARY 4, 2019 A project to scan a small selection of the film chips of historical earthquake recordings to digital files was started in 1996. In addition to archiving historic data from the early years, the USGS has also worked to archive photos and descriptions of early seismometers.
Collection of 3D Geometries of Global Subduction Zones
Release Date: NOVEMBER 12, 2018 A new picture of the geometry of subducting slabs around the world, the locations of the world’s largest earthquakes.
Debris-Flow Forecasts Before Wildfires
Release Date: OCTOBER 15, 2018 USGS scientists have been pursuing a way to assess debris-flow hazards before a fire occurs.
New Methods for Dating and Sequencing Ancient Earthquakes Along the Wasatch Fault Zone
Release Date: OCTOBER 12, 2018 Complex geologic sites, like those between the fault segments along the Wasatch fault zone in Utah, make the dating and ordering past earthquakes a difficult task. Two new methods were used to make this task easier and to get better results.
A New Map of Rodgers Creek Fault in Sonoma County, California
Release Date: JULY 16, 2018 A new more detailed and higher resolution map of the Rodgers Creek Fault in Sonoma County, California, has been produced using aerial photography and hillshade imagery derived from LiDAR data.
Near Realtime Maps of Possible Earthquake-Triggered Landslides
Release Date: JUNE 25, 2018 USGS scientists have been developing a system to quickly identify areas where landslides may have been triggered by a significant earthquake.
A Possible Cause of Earthquakes in the Continental Interior
Release Date: JUNE 18, 2018 A new map of crustal stress across the U.S. shows that the plate interior stress is variable, with contributions from plate boundary stress, crustal collapse due to gravity, and more local and subtle changes to style, orientation, and earthquake rate.
Mountain Permafrost, Climate Change, and Rock Avalanches in Glacier Bay National Park, Alaska
Release Date: JUNE 18, 2018 We usually hear about landslides and avalanches that are caused by large amounts of rainfall, the shaking from earthquakes, or a volcanic eruption, but we may be hearing more about avalanches caused by the (seemingly innocuous) melting of ice in the coming years.
Slow-Motion Landslides
Release Date: JUNE 11, 2018 Sluggishly-moving earthflows can help us learn what controls the starting and stopping of landslides.
Landslides Can Cause More Landslides
Release Date: MAY 15, 2018 The deadliest individual landslides in the U.S. recently were in places where there had previously been a landslide. Why do landslides happen in the same place instead of on nearby slopes that appear to be just as likely, if not more likely, to slide?
The Past Holds the Key to the Future of Aftershock Forecasting
Release Date: MAY 7, 2018 The outcomes of past aftershock sequences can be used to describe the range of possibilities for a current sequence.
Untangling Faults at Depth – What Lies Beneath Panamint Valley, California?
Release Date: APRIL 30, 2018 The eastern edge of Panamint Valley,CA has two types of faults that can be seen in the near-surface geology. 150 geophones and a seismic source will help reveal the subsurface picture.
Science and Products
Filter Total Items: 34
Preserving Historic Earthquake Records and Photos of the Instruments that Recorded Them
Release Date: FEBRUARY 4, 2019 A project to scan a small selection of the film chips of historical earthquake recordings to digital files was started in 1996. In addition to archiving historic data from the early years, the USGS has also worked to archive photos and descriptions of early seismometers.
Collection of 3D Geometries of Global Subduction Zones
Release Date: NOVEMBER 12, 2018 A new picture of the geometry of subducting slabs around the world, the locations of the world’s largest earthquakes.
Debris-Flow Forecasts Before Wildfires
Release Date: OCTOBER 15, 2018 USGS scientists have been pursuing a way to assess debris-flow hazards before a fire occurs.
New Methods for Dating and Sequencing Ancient Earthquakes Along the Wasatch Fault Zone
Release Date: OCTOBER 12, 2018 Complex geologic sites, like those between the fault segments along the Wasatch fault zone in Utah, make the dating and ordering past earthquakes a difficult task. Two new methods were used to make this task easier and to get better results.
A New Map of Rodgers Creek Fault in Sonoma County, California
Release Date: JULY 16, 2018 A new more detailed and higher resolution map of the Rodgers Creek Fault in Sonoma County, California, has been produced using aerial photography and hillshade imagery derived from LiDAR data.
Near Realtime Maps of Possible Earthquake-Triggered Landslides
Release Date: JUNE 25, 2018 USGS scientists have been developing a system to quickly identify areas where landslides may have been triggered by a significant earthquake.
A Possible Cause of Earthquakes in the Continental Interior
Release Date: JUNE 18, 2018 A new map of crustal stress across the U.S. shows that the plate interior stress is variable, with contributions from plate boundary stress, crustal collapse due to gravity, and more local and subtle changes to style, orientation, and earthquake rate.
Mountain Permafrost, Climate Change, and Rock Avalanches in Glacier Bay National Park, Alaska
Release Date: JUNE 18, 2018 We usually hear about landslides and avalanches that are caused by large amounts of rainfall, the shaking from earthquakes, or a volcanic eruption, but we may be hearing more about avalanches caused by the (seemingly innocuous) melting of ice in the coming years.
Slow-Motion Landslides
Release Date: JUNE 11, 2018 Sluggishly-moving earthflows can help us learn what controls the starting and stopping of landslides.
Landslides Can Cause More Landslides
Release Date: MAY 15, 2018 The deadliest individual landslides in the U.S. recently were in places where there had previously been a landslide. Why do landslides happen in the same place instead of on nearby slopes that appear to be just as likely, if not more likely, to slide?
The Past Holds the Key to the Future of Aftershock Forecasting
Release Date: MAY 7, 2018 The outcomes of past aftershock sequences can be used to describe the range of possibilities for a current sequence.
Untangling Faults at Depth – What Lies Beneath Panamint Valley, California?
Release Date: APRIL 30, 2018 The eastern edge of Panamint Valley,CA has two types of faults that can be seen in the near-surface geology. 150 geophones and a seismic source will help reveal the subsurface picture.
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government