Susan E. Hough
Susan Hough is a scientist in the Earthquake Hazards Program.
Science and Products
Filter Total Items: 100
Spatial variability of "Did You Feel It?" intensity data: insights into sampling biases in historical earthquake intensity distributions
Recent parallel development of improved quantitative methods to analyze intensity distributions for historical earthquakes and of web‐based systems for collecting intensity data for modern earthquakes provides an opportunity to reconsider not only important individual historical earthquakes but also the overall characterization of intensity distributions for historical events. The focus of this st
Authors
Susan E. Hough
Reverberations on the watery element: A significant tsunamigenic historical earthquake offshore the Carolina coast
We investigate an early nineteenth-century earthquake that has
been previously cataloged but not previously investigated in
detail or recognized as a significant event. The earthquake
struck at approximately 4:30 a.m. LT on 8 January 1817 and
was widely felt throughout the southeastern and mid-Atlantic
United States. Around 11:00 a.m. the same day, an eyewitness
described a 12-inch tide that rose
Authors
Susan E. Hough, Jeffrey Munsey, Steven N. Ward
Missing great earthquakes
The occurrence of three earthquakes with moment magnitude (Mw) greater than 8.8 and six earthquakes larger than Mw 8.5, since 2004, has raised interest in the long-term global rate of great earthquakes. Past studies have focused on the analysis of earthquakes since 1900, which roughly marks the start of the instrumental era in seismology. Before this time, the catalog is less complete and magnitud
Authors
Susan E. Hough
Initial assessment of the intensity distribution of the 2011 Mw5.8 Mineral, Virginia, earthquake
The intensity data collected by the U.S. Geological Survey (USGS) "Did You Feel It?" (DYFI) Website (USGS, DYFI; http://earthquake.usgs.gov/earthquakes/dyfi/events/se/082311a/us/index.html, last accessed Sept 2011) for the Mw5.8 Mineral, Virginia, earthquake, are unprecedented in their spatial richness and geographical extent. More than 133,000 responses were received during the first week followi
Authors
Susan E. Hough
Frequency-dependent attenuation of the Hispaniola Island region of the Caribbean Sea
We determine frequency-dependent attenuation 1/Q(f) for the Hispaniola region using direct S and Lg waves over five distinct passbands from 0.5 to 16 Hz. Data consist of 832 high-quality vertical and horizontal component waveforms recorded on short-period and broadband seismometers from the devastating 12 January 2010 M 7.0 Haiti earthquake and the rich sequence of aftershocks. For the distance ra
Authors
D. McNamara, M. Meremonte, J.Z. Maharrey, S-L. Mildor, J.R. Altidore, D. Anglade, S. E. Hough, D. Given, H. Benz, L. Gee, A. Frankel
A terrain-based site characterization map of California with implications for the contiguous United States
We present an approach based on geomorphometry to predict material properties and characterize site conditions using the VS30 parameter (time‐averaged shear‐wave velocity to a depth of 30 m). Our framework consists of an automated terrain classification scheme based on taxonomic criteria (slope gradient, local convexity, and surface texture) that systematically identifies 16 terrain types from 1‐k
Authors
Alan K. Yong, Susan E. Hough, Junko Iwahashi, Amy Braverman
Site characterization and site response in Port-au-Prince, Haiti
Waveform analysis of aftershocks of the Mw7.0 Haiti earthquake of 12 January 2010 reveals amplification of ground motions at sites within the Cul de Sac valley in which Port-au-Prince is situated. Relative to ground motions recorded at a hard-rock reference site, peak acceleration values are amplified by a factor of approximately 1.8 at sites on low-lying Mio-Pliocene deposits in central Port-au-P
Authors
Susan E. Hough, Alan K. Yong, Jean Robert Altidor, Dieuseul Anglade, Douglas D. Given, Saint-Louis Mildor
Seismic zonation of Port-Au-Prince using pixel- and object-based imaging analysis methods on ASTER GDEM
We report about a preliminary study to evaluate the use of semi-automated imaging analysis of remotely-sensed DEM and field geophysical measurements to develop a seismic-zonation map of Port-au-Prince, Haiti. For in situ data, VS30 values are derived from the MASW technique deployed in and around the city. For satellite imagery, we use an ASTER GDEM of Hispaniola. We apply both pixel- and object-b
Authors
Alan Yong, Susan E. Hough, Brady R. Cox, Ellen M. Rathje, Jeff Bachhuber, Ranon Dulberg, David Hulslander, Lisa Christiansen, Michael J. Abrams
Toward a consistent model for strain accrual and release for the New Madrid Seismic Zone, central United States
At the heart of the conundrum of seismogenesis in the New Madrid Seismic Zone is the apparently substantial discrepancy between low strain rate and high recent seismic moment release. In this study we revisit the magnitudes of the four principal 1811–1812 earthquakes using intensity values determined from individual assessments from four experts. Using these values and the grid search method of Ba
Authors
S. E. Hough, M. Page
Strong ground motion in Port-au-Prince, Haiti, during the M7.0 12 January 2010 Haiti earthquake
No strong motion records are available for the 12 January 2010 M7.0 Haiti earthquake. We use aftershock recordings as well as detailed considerations of damage to estimate the severity and distribution of mainshock shaking in Port-au-Prince. Relative to ground motions at a hard - rock reference site, peak accelerations are amplified by a factor of approximately 2 at sites on low-lying deposits in
Authors
Susan E Hough, Doug Given, Tomoyo Taniguchi, J.R. Altidor, Dieuseul Anglade, S-L. Mildor
Seismic-zonation of Port-au-Prince using pixel- and object-based imaging analysis methods on ASTER GDEM
We report about a preliminary study to evaluate the use of semi-automated imaging analysis of remotely-sensed DEM and field geophysical measurements to develop a seismic-zonation map of Port-au-Prince, Haiti. For in situ data, Vs30 values are derived from the MASW technique deployed in and around the city. For satellite imagery, we use an ASTER GDEM of Hispaniola. We apply both pixel- and object-b
Authors
A. Yong, S. E. Hough, B.R. Cox, E.M. Rathje, J. Bachhuber, R. Dulberg, D. Hulslander, L. Christiansen, M. J. Abrams
Localized damage associated with topographic amplification during the 12 January 2010 M 7.0 Haiti earthquake
Local geological conditions, including both near-surface sedimentary layers1,2,3,4 and topographic features5,6,7,8,9, are known to significantly influence ground motions caused by earthquakes. Microzonation maps use local geological conditions to characterize seismic hazard, but commonly incorporate the effect of only sedimentary layers10,11,12. Microzonation does not take into account local topog
Authors
Susan E. Hough, Jean Robert Altidor, Dieuseul Anglade, Douglas D. Given, Doug Given, M. Guillard Janvier, J. Zebulon Maharrey, Mark E. Meremonte, B. S.-L. Mildor, Claude Prepetit, Alan K. Yong
Science and Products
Filter Total Items: 100
Spatial variability of "Did You Feel It?" intensity data: insights into sampling biases in historical earthquake intensity distributions
Recent parallel development of improved quantitative methods to analyze intensity distributions for historical earthquakes and of web‐based systems for collecting intensity data for modern earthquakes provides an opportunity to reconsider not only important individual historical earthquakes but also the overall characterization of intensity distributions for historical events. The focus of this st
Authors
Susan E. Hough
Reverberations on the watery element: A significant tsunamigenic historical earthquake offshore the Carolina coast
We investigate an early nineteenth-century earthquake that has
been previously cataloged but not previously investigated in
detail or recognized as a significant event. The earthquake
struck at approximately 4:30 a.m. LT on 8 January 1817 and
was widely felt throughout the southeastern and mid-Atlantic
United States. Around 11:00 a.m. the same day, an eyewitness
described a 12-inch tide that rose
Authors
Susan E. Hough, Jeffrey Munsey, Steven N. Ward
Missing great earthquakes
The occurrence of three earthquakes with moment magnitude (Mw) greater than 8.8 and six earthquakes larger than Mw 8.5, since 2004, has raised interest in the long-term global rate of great earthquakes. Past studies have focused on the analysis of earthquakes since 1900, which roughly marks the start of the instrumental era in seismology. Before this time, the catalog is less complete and magnitud
Authors
Susan E. Hough
Initial assessment of the intensity distribution of the 2011 Mw5.8 Mineral, Virginia, earthquake
The intensity data collected by the U.S. Geological Survey (USGS) "Did You Feel It?" (DYFI) Website (USGS, DYFI; http://earthquake.usgs.gov/earthquakes/dyfi/events/se/082311a/us/index.html, last accessed Sept 2011) for the Mw5.8 Mineral, Virginia, earthquake, are unprecedented in their spatial richness and geographical extent. More than 133,000 responses were received during the first week followi
Authors
Susan E. Hough
Frequency-dependent attenuation of the Hispaniola Island region of the Caribbean Sea
We determine frequency-dependent attenuation 1/Q(f) for the Hispaniola region using direct S and Lg waves over five distinct passbands from 0.5 to 16 Hz. Data consist of 832 high-quality vertical and horizontal component waveforms recorded on short-period and broadband seismometers from the devastating 12 January 2010 M 7.0 Haiti earthquake and the rich sequence of aftershocks. For the distance ra
Authors
D. McNamara, M. Meremonte, J.Z. Maharrey, S-L. Mildor, J.R. Altidore, D. Anglade, S. E. Hough, D. Given, H. Benz, L. Gee, A. Frankel
A terrain-based site characterization map of California with implications for the contiguous United States
We present an approach based on geomorphometry to predict material properties and characterize site conditions using the VS30 parameter (time‐averaged shear‐wave velocity to a depth of 30 m). Our framework consists of an automated terrain classification scheme based on taxonomic criteria (slope gradient, local convexity, and surface texture) that systematically identifies 16 terrain types from 1‐k
Authors
Alan K. Yong, Susan E. Hough, Junko Iwahashi, Amy Braverman
Site characterization and site response in Port-au-Prince, Haiti
Waveform analysis of aftershocks of the Mw7.0 Haiti earthquake of 12 January 2010 reveals amplification of ground motions at sites within the Cul de Sac valley in which Port-au-Prince is situated. Relative to ground motions recorded at a hard-rock reference site, peak acceleration values are amplified by a factor of approximately 1.8 at sites on low-lying Mio-Pliocene deposits in central Port-au-P
Authors
Susan E. Hough, Alan K. Yong, Jean Robert Altidor, Dieuseul Anglade, Douglas D. Given, Saint-Louis Mildor
Seismic zonation of Port-Au-Prince using pixel- and object-based imaging analysis methods on ASTER GDEM
We report about a preliminary study to evaluate the use of semi-automated imaging analysis of remotely-sensed DEM and field geophysical measurements to develop a seismic-zonation map of Port-au-Prince, Haiti. For in situ data, VS30 values are derived from the MASW technique deployed in and around the city. For satellite imagery, we use an ASTER GDEM of Hispaniola. We apply both pixel- and object-b
Authors
Alan Yong, Susan E. Hough, Brady R. Cox, Ellen M. Rathje, Jeff Bachhuber, Ranon Dulberg, David Hulslander, Lisa Christiansen, Michael J. Abrams
Toward a consistent model for strain accrual and release for the New Madrid Seismic Zone, central United States
At the heart of the conundrum of seismogenesis in the New Madrid Seismic Zone is the apparently substantial discrepancy between low strain rate and high recent seismic moment release. In this study we revisit the magnitudes of the four principal 1811–1812 earthquakes using intensity values determined from individual assessments from four experts. Using these values and the grid search method of Ba
Authors
S. E. Hough, M. Page
Strong ground motion in Port-au-Prince, Haiti, during the M7.0 12 January 2010 Haiti earthquake
No strong motion records are available for the 12 January 2010 M7.0 Haiti earthquake. We use aftershock recordings as well as detailed considerations of damage to estimate the severity and distribution of mainshock shaking in Port-au-Prince. Relative to ground motions at a hard - rock reference site, peak accelerations are amplified by a factor of approximately 2 at sites on low-lying deposits in
Authors
Susan E Hough, Doug Given, Tomoyo Taniguchi, J.R. Altidor, Dieuseul Anglade, S-L. Mildor
Seismic-zonation of Port-au-Prince using pixel- and object-based imaging analysis methods on ASTER GDEM
We report about a preliminary study to evaluate the use of semi-automated imaging analysis of remotely-sensed DEM and field geophysical measurements to develop a seismic-zonation map of Port-au-Prince, Haiti. For in situ data, Vs30 values are derived from the MASW technique deployed in and around the city. For satellite imagery, we use an ASTER GDEM of Hispaniola. We apply both pixel- and object-b
Authors
A. Yong, S. E. Hough, B.R. Cox, E.M. Rathje, J. Bachhuber, R. Dulberg, D. Hulslander, L. Christiansen, M. J. Abrams
Localized damage associated with topographic amplification during the 12 January 2010 M 7.0 Haiti earthquake
Local geological conditions, including both near-surface sedimentary layers1,2,3,4 and topographic features5,6,7,8,9, are known to significantly influence ground motions caused by earthquakes. Microzonation maps use local geological conditions to characterize seismic hazard, but commonly incorporate the effect of only sedimentary layers10,11,12. Microzonation does not take into account local topog
Authors
Susan E. Hough, Jean Robert Altidor, Dieuseul Anglade, Douglas D. Given, Doug Given, M. Guillard Janvier, J. Zebulon Maharrey, Mark E. Meremonte, B. S.-L. Mildor, Claude Prepetit, Alan K. Yong