A5028943110- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Geological and Geophysical Studies
- High-pressure geophysics and materials
- Seismology and Earthquake Studies
- Earthquake Detection and Analysis
- Seismic Waves and Analysis
- Geological formations and processes
- Geology and Paleoclimatology Research
- Landslides and related hazards
- Tropical and Extratropical Cyclones Research
- Marine and environmental studies
- Geophysics and Sensor Technology
- Offshore Engineering and Technologies
- Disaster Management and Resilience
- Earthquake and Tsunami Effects
- Seismic Imaging and Inversion Techniques
- Space Satellite Systems and Control
- Seismic Performance and Analysis
- Planetary Science and Exploration
- Spacecraft and Cryogenic Technologies
- Ocean Waves and Remote Sensing
- Construction Engineering and Safety
- Arctic and Russian Policy Studies
- Geological and Geophysical Studies Worldwide
GNS Science
2015-2023
Geoscience Australia
2006-2016
An earthquake with a dozen faults The 2016 moment magnitude ( M w ) 7.8 Kaikōura was one of the largest ever to hit New Zealand. Hamling et al. show new slip model that it an incredibly complex event. Unlike most earthquakes, multiple ruptured generate ground shaking. A remarkable 12 overall, rupture jumping between located up 15 km away from each other. should motivate rethinking certain seismic hazard models, which do not presently allow for this unusual pattern. Science , issue p. eaam7194
Abstract On 28 September 2018, a strike‐slip earthquake occurred in Palu, Indonesia, and was followed by series of tsunami waves that devastated the coast Palu Bay. The recorded at Pantoloan tide gauge station with peak amplitude ~2 m above water level struck high tide. We use waveform synthetic aperture rada displacement data joint inversion to estimate vertical around narrow bay. Our result suggests middle bay uplifted up 0.8 m, while other parts subsided 1 m. However, this seafloor model...
The occurrence of the Indian Ocean Tsunami on 26 December, 2004 has raised concern about difficulty in determining appropriate tsunami mitigation measures Australia, due to lack information threat. A first step development such is a hazard assessment, which gives an indication areas coastline are most likely experience tsunamis, and how events are. Here we present results probabilistic assessment for Western Australia (WA). Compared other parts WA experiences relatively high frequency...
A 2-D numerical model is used to investigate the evolution of accretionary wedges and fold-and-thrust belts. The method based on distinct-element (DEM). Unlike many continuum models, DEM allows localization occur even after substantial amounts deformation. study simple thrust belts with a rigid backstop base. Experiments are done large range coefficients interelement friction (μe) element-wall (μb). Two modes deformation, which depend mainly μb, observed. For weak base case (low μb),...
Estimates of the current rate deformation and surface uplift for Australian continent are derived by integration a new seismic database show that parts currently experiencing at 1– 5 × 10−16/s uplifting 10–50 m/Ma. In east, these regions coincide with maximum topography, suggesting that, if this is long-term, up to 50% present-day topographic relief in southeastern Highlands Flinders Ranges has formed last 10 Ma, i.e. time we estimate onset stress field experienced Indo-Australian Plate....
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...
Analogue models are used to examine crustal‐scale faulting at obliquely convergent continental plate boundaries. A uniform Coulomb material is deformed with basal kinematic boundary conditions model two lithospheric plates. The mantle part of one assumed detach from its overriding crust and then be subducted beneath the other plate. obliquity collision remain constant throughout deformation. Experiments run obliquities ranging pure convergence (low obliquity) strike slip (high obliquity)....
Abstract. Over the last decade precomputed tsunami propagation model databases have been used extensively for both forecasting and hazard risk assessment. However, effect of uncertainty in earthquake source parameters on results simulated scenarios has not always examined great detail. Here we undertaken a systematic study maximum wave height (hmax) as function rupture that generates it (specifically strike, dip, rake, depth magnitude). We shown even simple case propagating over flat...
Abstract. The Vanuatu subduction zone (VSZ) is known to be seismically very active, due the high convergence rate between Australian and Pacific tectonic plates for majority of margin. However, this not case on its southernmost part south latitude 22.5∘ S east longitude 170∘ E, which neither highly tectonically active nor has it produced large tsunamis over past 150 years. It also been widely studied. On 11 February 2021 (10 UTC), a magnitude Mw 7.7 earthquake triggered tsunami warning in...
Thin plate finite element models of the neotectonic deformation Australian have been calculated in order to estimate stress and strain rate within plate, specifically concentrating on continent. The model includes plate‐bounding faults, an anelastic brittle‐ductile layered rheology option laterally varying elevation heat flow. results are compared (1) velocity geodetic benchmarks (2) spreading mid‐oceanic ridges along plate's margins, (3) direction maximum horizontal principal stress, (4)...
Although the time‐averaged shear‐wave velocity down to 30 m depth ( V S 30) can be a proxy for estimating earthquake ground‐motion amplification, significant controversy exists about its limitations when used as single parameter prediction of amplification. To examine this question in absence relevant strong‐motion records, we use range different methods measure profiles and resulting theoretical site amplification factors (AFs) 30 sites Newcastle area, Australia, series blind comparison...
Abstract Two repeating compensated linear vector dipole (CLVD) earthquakes occurred in 2009 and 2017 on the Kermadec Ridge near Curtis submarine volcano. The tsunami seismic waveforms of both events are almost identical. Simulated compared with observations event to estimate location geometry source. A CLVD source model at 8–14 km depth is consistent global CMT solution but generates no tsunami. can be well reproduced if about 1.5 deep. However, a this not observed waves. This suggests that...