Susan E. Hough
Susan Hough is a scientist in the Earthquake Hazards Program.
Science and Products
Filter Total Items: 100
Writing on the walls: Geological context and early American spiritual beliefs
Native American culture in many parts of California is preserved in fragmentary oral and conventional written histories, but also in sometimes dramatic petroglyphs and pictographs throughout the state. The symbolism of these images has been interpreted to reflect the natural environment, in particular issues related to rain. Although there is little doubt that rain was of paramount concern to nati
Authors
S. E. Hough
Remotely triggered earthquakes following moderate main shocks
Since 1992, remotely triggered earthquakes have been identified following large (M > 7) earthquakes in California as well as in other regions. These events, which occur at much greater distances than classic aftershocks, occur predominantly in active geothermal or volcanic regions, leading to theories that the earthquakes are triggered when passing seismic waves cause disruptions in magmatic or ot
Authors
Susan E. Hough
Remotely triggered earthquakes following moderate mainshocks (or, why California is not falling into the ocean)
On several occasions in recent memory California has experienced apparent clusters of earthquake activity that are too far apart to be considered related according to a classic taxonomy that includes foreshocks, mainshocks, and aftershocks. During a week-long period in July 1986, California experienced the M 6.0 North Palm Springs earthquake, the M 5.5 Oceanside earthquake, and a swarm of smaller
Authors
Susan E. Hough
Wagon loads of sand blows in White County, Illinois
Several anecdotal accounts provide compelling evidence that liquefaction occurred at several sites in Illinois during the 1811-1812 New Madrid sequence, as much as 250 km north of the New Madrid seismic zone (NMSZ). At one Wabash Valley location, sand blows are still evident near Big Prairie, Illinois, a location described in a particularly detailed and precise historic account. This account inclu
Authors
Susan E. Hough, Roger Bilham, Karl Mueller, William Stephenson, Robert Williams, Jack Odum
Earthquakes: Predicting the unpredictable?
The earthquake prediction pendulum has swung from optimism in the 1970s to rather extreme pessimism in the 1990s. Earlier work revealed evidence of possible earthquake precursors: physical changes in the planet that signal that a large earthquake is on the way. Some respected earthquake scientists argued that earthquakes are likewise fundamentally unpredictable. The fate of the Parkfield predictio
Authors
Susan E. Hough
Geotechnical characterization of TriNet sites: A status report
The TriNet project, launched in 1997, created an improved, real-time seismic monitoring network in Southern California. Planning of the network began in 1995 (e.g., Heaton et al., 1996), building on the success of the earlier TERRAscope network, which included 24 digital broadband and strong-motion instruments throughout Southern California (e.g., Kanamori et al., 1993). At the end of the five-yea
Authors
John Tinsley, Susan E. Hough, Alan K. Yong, Kanamori Hiroo, Ellen Yu, V. Appel, Chris Wills
Revisiting the 23 February 1892 Laguna Salada earthquake
According to some compilations, the Laguna Salada, Baja California, earthquake of 23 February 1892 ranks among the largest earthquakes in California and Baja California in historic times. Although surface rupture was not documented at the time of the earthquake, recent geologic investigations have identified and mapped a rupture on the Laguna Salada fault that can be associated with high probabili
Authors
S. E. Hough, A. Elliot
Analysing the 1811-1812 New Madrid earthquakes with recent instrumentally recorded aftershocks
Although dynamic stress changes associated with the passage of seismic waves are thought to trigger earthquakes at great distances, more than 60 per cent of all aftershocks appear to be triggered by static stress changes within two rupture lengths of a mainshock. The observed distribution of aftershocks may thus be used to infer details of mainshock rupture geometry. Aftershocks following large mi
Authors
K. Mueller, S. E. Hough, R. Bilham
Scientific overview and historical context of the 1811-1812 new Madrid earthquake sequence
The central and eastern United States has experienced only 5 historic earthquakes with Mw 7.0, four during the New Madrid sequence of 1811-1812: three principal mainshocks and the so-called «dawn aftershock» following the first mainshock. Much of the historic earthquake research done in the United States has focused on the New Madrid Seismic Zone (NMSZ), because the largest New Madrid earthquakes
Authors
S. E. Hough
Remotely triggered seismicity on the United States west coast following the Mw 7.9 Denali fault earthquake
The Mw 7.9 Denali fault earthquake in central Alaska of 3 November 2002 triggered earthquakes across western North America at epicentral distances of up to at least 3660 km. We describe the spatial and temporal development of triggered activity in California and the Pacific Northwest, focusing on Mount Rainier, the Geysers geothermal field, the Long Valley caldera, and the Coso geothermal field.Th
Authors
S. G. Prejean, D. P. Hill, E. E. Brodsky, S. E. Hough, M.J.S. Johnston, S. D. Malone, D. H. Oppenheimer, A. M. Pitt, K. B. Richards-Dinger
Estimation of ground motion for Bhuj (26 January 2001; Mw 7.6) and for future earthquakes in India
Only five moderate and large earthquakes (Mw ≥5.7) in India—three in the Indian shield region and two in the Himalayan arc region—have given rise to multiple strong ground-motion recordings. Near-source data are available for only two of these events. The Bhuj earthquake (Mw 7.6), which occurred in the shield region, gave rise to useful recordings at distances exceeding 550 km. Because of the scar
Authors
S.K. Singh, B.K. Bansal, S.N. Bhattacharya, J.F. Pacheco, R.S. Dattatrayam, M. Ordaz, G. Suresh, S. E. Hough
Intraplate triggered earthquakes: Observations and interpretation
We present evidence that at least two of the three 1811-1812 New Madrid, central United States, mainshocks and the 1886 Charleston, South Carolina, earthquake triggered earthquakes at regional distances. In addition to previously published evidence for triggered earthquakes in the northern Kentucky/southern Ohio region in 1812, we present evidence suggesting that triggered events might have occurr
Authors
S. E. Hough, L. Seeber, J.G. Armbruster
Science and Products
Filter Total Items: 100
Writing on the walls: Geological context and early American spiritual beliefs
Native American culture in many parts of California is preserved in fragmentary oral and conventional written histories, but also in sometimes dramatic petroglyphs and pictographs throughout the state. The symbolism of these images has been interpreted to reflect the natural environment, in particular issues related to rain. Although there is little doubt that rain was of paramount concern to nati
Authors
S. E. Hough
Remotely triggered earthquakes following moderate main shocks
Since 1992, remotely triggered earthquakes have been identified following large (M > 7) earthquakes in California as well as in other regions. These events, which occur at much greater distances than classic aftershocks, occur predominantly in active geothermal or volcanic regions, leading to theories that the earthquakes are triggered when passing seismic waves cause disruptions in magmatic or ot
Authors
Susan E. Hough
Remotely triggered earthquakes following moderate mainshocks (or, why California is not falling into the ocean)
On several occasions in recent memory California has experienced apparent clusters of earthquake activity that are too far apart to be considered related according to a classic taxonomy that includes foreshocks, mainshocks, and aftershocks. During a week-long period in July 1986, California experienced the M 6.0 North Palm Springs earthquake, the M 5.5 Oceanside earthquake, and a swarm of smaller
Authors
Susan E. Hough
Wagon loads of sand blows in White County, Illinois
Several anecdotal accounts provide compelling evidence that liquefaction occurred at several sites in Illinois during the 1811-1812 New Madrid sequence, as much as 250 km north of the New Madrid seismic zone (NMSZ). At one Wabash Valley location, sand blows are still evident near Big Prairie, Illinois, a location described in a particularly detailed and precise historic account. This account inclu
Authors
Susan E. Hough, Roger Bilham, Karl Mueller, William Stephenson, Robert Williams, Jack Odum
Earthquakes: Predicting the unpredictable?
The earthquake prediction pendulum has swung from optimism in the 1970s to rather extreme pessimism in the 1990s. Earlier work revealed evidence of possible earthquake precursors: physical changes in the planet that signal that a large earthquake is on the way. Some respected earthquake scientists argued that earthquakes are likewise fundamentally unpredictable. The fate of the Parkfield predictio
Authors
Susan E. Hough
Geotechnical characterization of TriNet sites: A status report
The TriNet project, launched in 1997, created an improved, real-time seismic monitoring network in Southern California. Planning of the network began in 1995 (e.g., Heaton et al., 1996), building on the success of the earlier TERRAscope network, which included 24 digital broadband and strong-motion instruments throughout Southern California (e.g., Kanamori et al., 1993). At the end of the five-yea
Authors
John Tinsley, Susan E. Hough, Alan K. Yong, Kanamori Hiroo, Ellen Yu, V. Appel, Chris Wills
Revisiting the 23 February 1892 Laguna Salada earthquake
According to some compilations, the Laguna Salada, Baja California, earthquake of 23 February 1892 ranks among the largest earthquakes in California and Baja California in historic times. Although surface rupture was not documented at the time of the earthquake, recent geologic investigations have identified and mapped a rupture on the Laguna Salada fault that can be associated with high probabili
Authors
S. E. Hough, A. Elliot
Analysing the 1811-1812 New Madrid earthquakes with recent instrumentally recorded aftershocks
Although dynamic stress changes associated with the passage of seismic waves are thought to trigger earthquakes at great distances, more than 60 per cent of all aftershocks appear to be triggered by static stress changes within two rupture lengths of a mainshock. The observed distribution of aftershocks may thus be used to infer details of mainshock rupture geometry. Aftershocks following large mi
Authors
K. Mueller, S. E. Hough, R. Bilham
Scientific overview and historical context of the 1811-1812 new Madrid earthquake sequence
The central and eastern United States has experienced only 5 historic earthquakes with Mw 7.0, four during the New Madrid sequence of 1811-1812: three principal mainshocks and the so-called «dawn aftershock» following the first mainshock. Much of the historic earthquake research done in the United States has focused on the New Madrid Seismic Zone (NMSZ), because the largest New Madrid earthquakes
Authors
S. E. Hough
Remotely triggered seismicity on the United States west coast following the Mw 7.9 Denali fault earthquake
The Mw 7.9 Denali fault earthquake in central Alaska of 3 November 2002 triggered earthquakes across western North America at epicentral distances of up to at least 3660 km. We describe the spatial and temporal development of triggered activity in California and the Pacific Northwest, focusing on Mount Rainier, the Geysers geothermal field, the Long Valley caldera, and the Coso geothermal field.Th
Authors
S. G. Prejean, D. P. Hill, E. E. Brodsky, S. E. Hough, M.J.S. Johnston, S. D. Malone, D. H. Oppenheimer, A. M. Pitt, K. B. Richards-Dinger
Estimation of ground motion for Bhuj (26 January 2001; Mw 7.6) and for future earthquakes in India
Only five moderate and large earthquakes (Mw ≥5.7) in India—three in the Indian shield region and two in the Himalayan arc region—have given rise to multiple strong ground-motion recordings. Near-source data are available for only two of these events. The Bhuj earthquake (Mw 7.6), which occurred in the shield region, gave rise to useful recordings at distances exceeding 550 km. Because of the scar
Authors
S.K. Singh, B.K. Bansal, S.N. Bhattacharya, J.F. Pacheco, R.S. Dattatrayam, M. Ordaz, G. Suresh, S. E. Hough
Intraplate triggered earthquakes: Observations and interpretation
We present evidence that at least two of the three 1811-1812 New Madrid, central United States, mainshocks and the 1886 Charleston, South Carolina, earthquake triggered earthquakes at regional distances. In addition to previously published evidence for triggered earthquakes in the northern Kentucky/southern Ohio region in 1812, we present evidence suggesting that triggered events might have occurr
Authors
S. E. Hough, L. Seeber, J.G. Armbruster