National Seismic-Hazard Maps: Documentation June 1996

Frankel, Arthur; Mueller, C.S.; Barnhard, Theodore P.; Perkins, David M.; Leyendecker, E. V.; Dickman, N.; Hanson, Stanley L.; Hopper, Margaret G.

doi:10.3133/ofr96532

Cited by 429 publications

(413 citation statements)

References 48 publications

Supporting

Mentioning

393

Contrasting

Unclassified

Order By: Relevance

“…M W Ն5 events are expected to occur only once every 10-100 yr (Frankel et al, 1996). M W Ն4 events are expected only about once a year, on average.…”

Section: Discussionmentioning

confidence: 99%

Intraplate Triggered Earthquakes: Observations and Interpretation

Hough¹

2003

Bulletin of the Seismological Society of America

View full text Add to dashboard Cite

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 occurred in the Wabash Valley, to the south of the New Madrid Seismic Zone, and near Charleston, South Carolina. We also discuss evidence that earthquakes might have been triggered in northern Kentucky within seconds of the passage of surface waves from the 23 January 1812 New Madrid mainshock. After the 1886 Charleston earthquake, accounts suggest that triggered events occurred near Moodus, Connecticut, and in southern Indiana. Notwithstanding the uncertainty associated with analysis of historical accounts, there is evidence that at least three out of the four known M W 7 earthquakes in the central and eastern United States seem to have triggered earthquakes at distances beyond the typically assumed aftershock zone of 1-2 mainshock fault lengths. We explore the possibility that remotely triggered earthquakes might be common in low-strain-rate regions. We suggest that in a low-strain-rate environment, permanent, nonelastic deformation might play a more important role in stress accumulation than it does in interplate crust. Using a simple model incorporating elastic and anelastic strain release, we show that, for realistic parameter values, faults in intraplate crust remain close to their failure stress for a longer part of the earthquake cycle than do faults in high-strain-rate regions. Our results further suggest that remotely triggered earthquakes occur preferentially in regions of recent and/or future seismic activity, which suggests that faults are at a critical stress state in only some areas. Remotely triggered earthquakes may thus serve as beacons that identify regions of long-lived stress concentration.

show abstract

“…M W Ն5 events are expected to occur only once every 10-100 yr (Frankel et al, 1996). M W Ն4 events are expected only about once a year, on average.…”

Section: Discussionmentioning

confidence: 99%

Intraplate Triggered Earthquakes: Observations and Interpretation

Hough¹

2003

Bulletin of the Seismological Society of America

View full text Add to dashboard Cite

show abstract

“…Source models have been developed by Atkinson and Boore (1995), Frankel et al (1996), and Silva et al (2003). The first is a two-corner frequency model, while the second two sources implement a one-corner frequency model.…”

Section: Synthetic Accelerograms As Seismic Demand Input For Ceusmentioning

confidence: 99%

Simulation-Based Fragility Relationships for Unreinforced Masonry Buildings

2013

View full text Add to dashboard Cite

Unreinforced masonry (URM) structures represent a significant portion of the residential building stock of the Central and Eastern United States (CEUSA), accounting for 15% of homes in the 8-state region impacted by the New-Madrid Seismic Zone and an even greater portion of the building stock in most other regions of the world. In addition to significant population, the brittle nature of URM buildings further supports a thorough consideration of seismic response given the susceptibility to severe failure modes. Currently, there is a pressing need for analytically based fragility curves for URM buildings. In order to improve the estimation of damage state probabilities through the development of simulation-based masonry fragilities, an extensive literature survey is conducted on pushover analysis of URM structures. Using this data, capacity diagrams are generated, from which damage exceedance limit states are defined.Demand is simulated using synthetically derived accelerograms representative of the CEUSA.Structural response is evaluated using an advanced capacity spectrum method developed at the Mid-America Earthquake Center. Capacity, demand, and response are thus derived analytically and response data is used to generate an improved and uniform set of fragility curves for use in loss-assessment software via a framework amenable to rapid expansion of pushover database and variation of ground motion records. A set of best practices is hereby developed for selection and use of experimental and analytical data, input ground motions, analysis of structural capacity, limit state definitions, seismic design categories, and probabilistic analysis methods. Curves are expressed in multiple forms for wide range of use in loss-assessment applications. Results are discussed and compared with other relationships developed in the literature, along with those generated using HAZUS opinion-based capacity data. The parameters of the improved fragility relationships developed and presented in this thesis are provided and suggested for reliable use in seismic loss assessment software.iii To my wife, Erin iv ACKNOWLEDGMENTS

show abstract

“…It should be noted that different recurrence rates have been determined from dating offshore turbidites (Adams, 1990;Goldfinger et al, 2003). Also, different characteristic earthquakes have been employed such as with the National Seismic Hazard Maps that assume two weighted scenarios: (a) a M=9 rupture with a recurrence interval of approximately 500 years and (b) a series of floating M=8.3 earthquakes that fill the Cascadia seismic zone every 500 years (Frankel et al, 1996.…”

Section: Characteristic Earthquakesmentioning

confidence: 99%

Probabilistic Analysis of Tsunami Hazards*

2006

View full text Add to dashboard Cite

Abstract. Determining the likelihood of a disaster is a key component of any comprehensive hazard assessment. This is particularly true for tsunamis, even though most tsunami hazard assessments have in the past relied on scenario or deterministic type models. We discuss probabilistic tsunami hazard analysis (PTHA) from the standpoint of integrating computational methods with empirical analysis of past tsunami runup. PTHA is derived from probabilistic seismic hazard analysis (PSHA), with the main difference being that PTHA must account for far-field sources. The computational methods rely on numerical tsunami propagation models rather than empirical attenuation relationships as in PSHA in determining ground motions. Because a number of source parameters affect local tsunami runup height, PTHA can become complex and computationally intensive. Empirical analysis can function in one of two ways, depending on the length and completeness of the tsunami catalog. For sitespecific studies where there is sufficient tsunami runup data available, hazard curves can primarily be derived from empirical analysis, with computational methods used to highlight deficiencies in the tsunami catalog. For region-wide analyses and sites where there are little to no tsunami data, a computationally based method such as Monte Carlo simulation is the primary method to establish tsunami hazards. Two case studies that describe how computational and empirical methods can be integrated are presented for Acapulco, Mexico (site-specific) and the U.S. Pacific Northwest coastline (region-wide analysis).

show abstract

National Seismic-Hazard Maps: Documentation June 1996

Abstract: Introduction 1 Melding CEUS and WUS maps 2 Number of sites and spacing 3 Sample hazard curves 3 Central and Eastern United States 3 Basic procedure 3 CEUS catalogs and b-value calculation 5 Attenuation relations for CEUS 6 Special Zones

Cited by 429 publications

References 48 publications

Intraplate Triggered Earthquakes: Observations and Interpretation

Intraplate Triggered Earthquakes: Observations and Interpretation

Simulation-Based Fragility Relationships for Unreinforced Masonry Buildings

Probabilistic Analysis of Tsunami Hazards*

Contact Info

Product

Resources

About