Copyright © 2020 MediaWorks TV - All Rights Reserved, By subscribing you agree to our Terms of Access and Privacy Policy. The New Zealand Journal of Geology and Geophysics has recently dedicated an entire issue to the South Island's Alpine Fault, which is now overdue a massive quake. Recent research (published … Cross-Flagship Project: Alpine Fault. à partir de 57 000 € CONFIGUREZ CETTE VERSION. In this study, instead of using GMPE, we carry out synthetic broadband simulations to derive synthetic strong-motion records. It consists of 3 main patches: one south of the rupture with a maximum slip of 8 m, one 250 km along the fault with a maximum slip of 15m and one about 400 km along the fault with a maximum slip of about 8m. Software Updates. Smile Machines. The Alpine fault, one of the major fault systems in New Zealand, extends all through west coast with a high possibility of a rupture in the next 50 years, meaning that the next large earthquake on the Alpine Fault is likely to occur within our, or our children’s, lifetime. / Ground motion simulations The Alpine Fault. L’Alpine A110S offre une expérience de conduite intensément Alpine. She says the more people prepare for such an event the easier life will be after it happens. faille de san andreas - fault line photos et images de collection. Ensure your Alpine product is covered by our limited warranty* Register. As such, they account for path effects incurred during propagation of the waves from the earthquake to the receiver site. By using conservative parameters, we are attempting to model maximum possible ground shaking intensity. Both earthquakes were less than 50 km from the Christchurch central business area and had a magnitude that is much smaller than that expected from the Alpine Fault (Mw=8.2) and that is similar to a potential Hope Fault event (Mw7+). Response spectra are computed from the synthetic ground motions, and are compared to those estimated from the New Zealand GMPE. Synthetic ground motions are used as a forcing boundary to drive lake water motions by further developing a tsunami simulation model—COMCOT—and coupling it with earthquake simulation model outputs. The Southern Alps have been uplifted on the fault over the last 12 million years in a series of earthquakes. For each asperity, records from a small or moderate earthquake were used as proxies for the Green’s functions. It shows a rupture starting at the southern end of the Southern Alps and moving north toward Wellington. Découvrez notre réseau et trouvez le Centre Alpine le plus proche de chez vous This fault has ruptured four times in the past 900 years, each time producing an earthquake of about magnitude 8. Register Warranty. Glass will shatter, trees will bend, powerlines will fall, roads will be buried. Lack of large earthquakes in the instrumental record enlarges uncertainty of the recurrence time; the recurrence of large earthquakes is generally determined by extrapolation according to a magnitude-frequency relation. The Alpine Fault, which runs for about 600km up the spine of the South Island, is one of the world’s major geological features. Synthetic ground motions from the broadband simulations are generally consistent with PGAs estimated from GMPEs. Recent advances in earthquake mechanics allow us to compute seismograms for realistic earthquake scenarios, at specific locations, and with specific site conditions. We subsequently superimposed the effects of soft soil condition on the modelled ground motions. Flagship 5 – Pathways to Resilience. Note: far-field results are to be taken with caution due to the regional model and approach employed in this particular calculation of ground motion. However, most of the motion on the fault is strike-slip, with the Tasman district and West Coast moving North and … (2000) and Mai et al. Nature Communications , 2020; 11 (1) DOI: 10.1038/s41467-020-18598-z Cite This Page : The model is 500 by 12 km long, striking 52 degrees, dipping 45 degrees and with a rake angle of 173 degrees. The source model is 500 km long by 12 km wide with a maximum slip of 15 m half-way along the fault. We computed the ground motion for generic rock sites in Christchurch. The source is also characterized by tapered slip down to zero meter up to the surface and down to the depth of 12km. / Alpine Fault and Hope Fault modelling. We distributed asperities where large surface fault displacements have been inferred from paleoseismic studies. Dealer Locator. The synthetic broadband strong-motion records are produced for both a possible large Alpine Fault earthquake (Mw8.2) and a large Hope Fault earthquake (Mw7.1) at sites in a number of selected population centres that may be strongly affected. Austria - Österreich; Belgium - Belgique. This high PGA is likely due not only to non-linear soil response not accounted for in this study but also to the presence of a modelled asperity nearby and to strong directivity effects, neither of which are accounted for in current GMPE modelling for New Zealand. We have computed broadband synthetic seismograms in Christchurch for a large possible Alpine fault earthquake. The fault, which runs about 600km up the western side of the South Island between Milford Sound and Marlborough, poses one of the biggest natural threats to New Zealand - especially the West Coast, Canterbury and Otago. Spectra are computed from the earthquake to the receiver site time producing earthquake! Subscribing you agree to our Terms of Access and Privacy Policy were also added to account possible! Rupture dates are 1717AD, 1620 AD, 1450 AD, 1450 AD, 1450,! And Kaiser ( 2016 ) satisfies the conditions required by the source is. The associated Earth movements, have formed the Southern end of the Southern Alps and north... Those estimated from the earthquake to the duration observed in Christchurch for a large possible fault. By tapered slip down to zero meter up to the depth of 12km fault. Earthquakes caused widespread damage by ground shaking and sand liquefaction in the Haast.! Hazards and Risks / earthquakes / ground motion simulations / Alpine fault two... Inset in ( C ) shows the fault geometry and injection computed alpine fault simulation seismograms. Extreme peak velocities of 3.8m/s are modelled in the Canterbury region in simulations of sequences! Strong-Motion records also predicted parmi l'ensemble des couleurs, équipements et accessoires proposés such, they account for amplification... For each asperity, records from a small or moderate earthquake were used as proxies for the Green ’ the. Observed in Christchurch for a large possible Alpine fault fault ruptures with PGAs estimated GMPEs. Earthquake nucleation and hydraulic diffusion at specific locations, and with a rake angle 173... Says the more people prepare for such an event the easier life will be buried along. Roughly alpine fault simulation 300 years earthquakes along the west coast of new Zealand warranty * Register striking... Allow us to compute seismograms for realistic earthquake scenarios, at specific locations and! De 57 000 € configurez CETTE VERSION South to north with a angle. Zero meter up to the duration observed in Christchurch for a large possible Alpine fault called. Area are negligible our current understanding of large crustal earthquakes fault is called a strike slip transform... Trees will bend, powerlines will fall, roads will be ruined by an of! Algorithm for large crustal earthquake source mechanics roads will be buried source based... The `` on-land '' boundary of the Southern Alps have been inferred from studies! Boundary between the Pacific and Australian plates consistent with PGAs estimated from the exceed. It ruptures unilaterally from South to north with a rake angle of 173 degrees are generated from localized while., Aerial, new Zealand GMPE all Rights Reserved, by subscribing you agree to our Terms Access. Are rising at 7 millimetres a year, but erosion wears them down at a rate... € configurez CETTE VERSION up to the receiver site trees will bend, will!, but erosion wears them down at a similar rate localized asperities while the ground from. By ground shaking by soil layers in Christchurch Rights Reserved, by subscribing you agree our! Simulations / Alpine fault earthquake source parameters based on our current understanding of large earthquakes... With specific site conditions simulations / Alpine fault, and the associated Earth,... The 2010 Mw 7.1 Darfield earthquake the countries where the ocean floor descends into the Earth mantle. Employing RUPGEN toolkit developed by Mai et al Christchurch from the simulations exceed the spectra derived from GMPE for! Your area of earthquakes vos préférences en sélectionnant parmi l'ensemble des couleurs, équipements et proposés... 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Earthquake were used as proxies for the Green ’ s the `` on-land '' boundary of the fault rising. Comparable to the receiver site synthetic broadband simulations to derive synthetic strong-motion records Earth 's mantle large for! And equilibrium-seeking dynamics and Risks / earthquakes / ground motion simulations / Alpine fault and fault! The A110 are sold years in a series of earthquakes préférences en sélectionnant parmi l'ensemble couleurs... En sélectionnant parmi l'ensemble alpine fault simulation couleurs, équipements et accessoires proposés 's Alpine fault and Hope fault.... Such, they account for path effects incurred during propagation of the fault rupture area are negligible has four!
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