A5006104045- earthquake and tectonic studies
- Seismic Waves and Analysis
- Seismic Performance and Analysis
- Seismology and Earthquake Studies
- Seismic Imaging and Inversion Techniques
- Geological and Geochemical Analysis
- Landslides and related hazards
- High-pressure geophysics and materials
- Structural Health Monitoring Techniques
- Earthquake Detection and Analysis
- Rock Mechanics and Modeling
- Geological and Geophysical Studies
- Underwater Acoustics Research
- Geological Modeling and Analysis
- Drilling and Well Engineering
- Geophysics and Sensor Technology
- Geological and Geophysical Studies Worldwide
- Environmental Education and Sustainability
- Infrastructure Maintenance and Monitoring
- Sociology and Education Studies
- Geographic Information Systems Studies
- Risk and Safety Analysis
- Masonry and Concrete Structural Analysis
- Structural mechanics and materials
- Ultrasonics and Acoustic Wave Propagation
Geoscience Australia
2012-2024
ACT Government
2006-2023
BNP Paribas (United Kingdom)
2022
Natural Resources Canada
2016-2020
Geological Survey of Canada
2015
United States Geological Survey
2007-2009
United States Department of the Interior
2009
Brandon University
2008
Monash University
2001-2004
We describe a technique to derive first-order site condition maps directly from topographic data. For calibration, we use global 30 arc sec data and V S measurements (here , refers the average shear-velocity down m) aggregated several studies in U.S., as well Taiwan, Italy, Australia. values are correlated against slope develop two sets of parameters for deriving : one active tectonic regions where relief is high, stable shields topography more subdued. By taking gradient choosing ranges...
An alternative method has recently been proposed for evaluating global seismic site conditions, or the average shear velocity to 30 m depth ( V S 30), from Shuttle Radar Topography Mission (SRTM) 30 arcsec digital elevation models (DEMs). The basic premise of is that topographic slope can be used as a reliable proxy 30 in absence geologically and geotechnically based site-condition maps through correlations between measurements gradient. Here we evaluate use higher-resolution (3 9 arcsec)...
Abstract Seismic hazard modeling is a multidisciplinary science that aims to forecast earthquake occurrence and its resultant ground shaking. Such models consist of probabilistic framework quantifies uncertainty across complex system; typically, this includes at least two model components developed from Earth science: seismic source motion models. Although there no scientific prescription for the length, most common analyses consider forecasting windows 30 50 years, which are typically an...
ABSTRACT A seismicity rate model (SRM) has been developed as part of the 2022 Aotearoa New Zealand National Seismic Hazard Model revision. The SRM consists many component models, each which falls into one two classes: (1) inversion fault (IFM); or (2) distributed (DSM). Here we provide an overview and a brief description models. upper plate IFM forecasts occurrence for hundreds thousands potential ruptures derived from Community Fault version 1.0 utilizing either geologic- geodetic-based...
Wedescribe aweighted-average approach for incorporating varioustypes of data (observed peak ground motions and intensities estimates from ground- motion prediction equations) into theShakeMap intensity mapping framework.ThisapproachrepresentsafundamentalrevisionofourexistingShakeMap methodology. In addition, the increased availability near-real-time macroseismic intensitydata,thedevelopmentofnewrelationshipsbetweenintensityandpeakground motions, new relationships to directly predict...
Abstract Alternative fault‐rupture‐scaling relationships are developed for M w 7.1–9.5 subduction interface earthquakes using a new database of consistently derived finite‐fault rupture models from teleseismic inversion. Scaling area, length, width, maximum slip, and average slip. These apply width saturation large‐magnitude (approximately >8.6) which the physical characteristics zones limit depth extent seismogenic rupture, consequently, down‐dip strong ground motion generation. On...
Executive Summary It is well-known that large global earthquakes can have a dramatic effect on local communities and the built environment. Moreover, ground motions amplified by surficial materials exacerbate situation, often making difference between minor major damage. For real-time earthquake impact alert system, such as Prompt Assessment of Global Earthquakes for Response (PAGER) (Wald others, 2006), we seek to rapidly evaluate potential shaking in source region subsequently provide an...
The compilation of a comprehensive global earthquake catalog that delivers both accurate source parameters and fatality estimates is task simple in theory but challenging practice. necessary information spread throughout numerous catalogs, reports, online databases. Earthquake catalogs are created for different purposes, consequently they excel areas. Some provide high-quality hypocenters while others contain carefully researched damage reports. Herein we examine published create PAGER-CAT,...
Abstract Large research initiatives such as the Global Earthquake Model (GEM) or Seismic HAzard haRmonization in Europe (SHARE) projects concentrate a great collaborative effort on defining global standard for seismic hazard estimations. In this context, there is an increasing need identifying ground‐motion prediction equations (GMPEs) that can be applied at both and regional scale. With amounts of strong‐motion records are now available worldwide, observational data provide valuable...
Within minutes of a significant earthquake anywhere on the globe, U.S. Geological Survey (USGS) Prompt Assessment Global Earthquakes for Response (PAGER) system assesses its potential societal impact. PAGER automatically estimates number people exposed to severe ground shaking and intensity at affected cities. Accompanying maps epicentral region show population distribution estimated ground-shaking intensity. A regionally specific comment describes inferred vulnerability regional building...
Seismic hazard assessments in stable continental regions such as Australia face considerable challenges compared with active tectonic regions. Long earthquake recurrence intervals relative to historical records make forecasting the magnitude, rates, and locations of future earthquakes difficult. Similarly, there are few recordings strong ground motions from moderate-to-large inform development selection appropriate ground-motion models (GMMs). Through thorough treatment these epistemic...
An atlas of maps peak ground motions and intensity 'ShakeMaps' has been developed for almost 5,000 recent historical global earthquakes. These are produced using established ShakeMap methodology (Wald others, 1999c; Wald 2005) constraints from macroseismic data, instrumental motions, regional topographically-based site amplifications, published earthquake-rupture models. Applying the allows a consistent approach to combine point observations with ground-motion predictions produce...
This article explores several area-based tests of long-term seismic hazard forecasts for the Australian continent. Using observed seismicity, ShakeMaps are calculated earthquakes that expected to have generated moderate-to-high levels ground shaking within continental Australia in past 50 years (January 1972 through December 2021). A “composite ShakeMap” is extracts maximum peak acceleration “observed” this 50-year period any site The fractional exceedance area composite map compared with...
Abstract The geological structure of southwest Australia comprises a rich, complex record Precambrian cratonization and Phanerozoic continental breakup. Despite the stable cratonic geologic history, over past five decades Western has been most seismically active region in Australia, though reason for this activity is not yet well understood. Southwest Seismic Network (SWAN) temporary broadband network 27 stations that was designed to both local earthquakes seismic hazard applications provide...
A dataset comprising some 1200 weak- and strong-motion records from 84 earthquakes is compiled to develop a regional ground-motion model for southeastern Australia (sea). Events were recorded 1993 2004 range in size moment magnitude 2.0 ≤ M 4.7. The decay of vertical-component Fourier spectral amplitudes modeled by trilinear geometrical spreading. low- frequency can be approximated the coefficient R −1.3 (where hypocentral distance) within 90 km seismic source. From approximately 160 km, we...
ABSTRACT The 2022 revision of the New Zealand National Seismic Hazard Model—Te Tauira Matapae Pūmate Rū i Aotearoa—requires an earthquake catalog that ideally measures size in moment magnitude. However, regional tensor solutions, which allow calculation magnitude MwNZ, were introduced only 2007. most reported national is a variation local ML. In Zealand, ML systematically larger than MwNZ over wide range. Furthermore, introduction analysis system SeisComP 2012 caused step changes catalog. We...
Research Article| November 19, 2013 Coseismic Surface Deformation Caused by the 23 March 2012 Mw 5.4 Ernabella (Pukatja) Earthquake, Central Australia: Implications for Fault Scaling Relations in Cratonic Settings D. Clark; Clark Minerals and Natural Hazards Division, Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia Search other works this author on: GSW Google Scholar A. McPherson; McPherson T. Allen; Allen M. De Kool Author Article Information Publisher: Seismological...
In stable continental regions (SCRs), the process of probabilistic seismic‐hazard assessment (PSHA) remains a scientific and technical challenge. producing new national hazard model for Australia, we developed several innovative techniques to address these challenges. The Australian seismic catalog is heterogeneous due variability between magnitude types sparse networks. To reduce resulting high epistemic uncertainty in recurrence parameters, b , magnitudes pre‐1990 earthquakes have been...
The Philippine archipelago is tectonically complex and seismically hazardous, yet few seismic hazard assessments have provided national coverage. This article presents an updated probabilistic analysis for the nation. Active shallow crustal seismicity modeled by faults gridded point sources accounting spatially variable occurrence rates. Subduction interfaces are with of geometry. Intraslab ruptures confined to slab volume. Source geometries earthquake rates derived from catalogs,...
Regional differences in ground-motion attenuation have long been thought to add uncertainty the prediction of ground motion. However, a growing body evidence suggests that regional may not be as significant previously and key between regions consequence limitations datasets over incomplete magnitude distance ranges. Undoubtedly, can exist owing crustal structure tectonic setting, these contribute at larger source-receiver distances. Herein, we examine use variety techniques for several...