Seismology 2022, IN A NUTSHELL 2022 was an exciting year for deep Earth and planetary sciences communities. I summarize our contributions, discoveries and advances in publications from 2022
Seismology Lighting Up Dark Fibre for Seismic Imaging Distributed acoustic sensing, or DAS, is a newly developed passive seismic technology that can transform telecommunication fibre-optic cable into linear arrays of ground motion sensors.
Geophysics Victorian Earthquake Round-up Last week's Woods Point earthquake in Victoria was a quite a surprise for most Australians outside the geophysical community and even among Earth scientists, an event of this magnitude was unexpected.
Seismology Australia surprised by moderate quake, but rumbling is not unusual On the morning of September 22, a magnitude-5.9 earthquake struck approximately 130 km northeast of Melbourne. Seismic waves were felt in Melbourne, Canberra, Sydney and Adelaide, and as far south as Tasmania.
Geophysics Australian Seismometers in Schools - Noise monitoring dashboard How we built a simple dashboard using Github actions with open source software and openly available (FAIR) data.
Geophysics Seeking The Truth Hidden In The Earth’s Lowermost Mantle If we were lucky to travel to the Earth’s centre, perhaps as part of an international crew of terranauts chosen to observe and investigate our planet’s interior…
Geophysics New Reference Earth Model: CCREM In these one-dimensional (1D) models, the Earth (or, as a matter of fact, any other planet) is divided into kilometres thick spherical layers, just like an onion on a much smaller scale
Geohazards How earthquake science supports decision-making in the ancient continent Australian earthquakes pose a high consequence – low likelihood risk that is widespread across the continent but is often not well characterised for some of Australia’s most important infrastructure.
AuScope Distributed Acoustic Sensing in Australia's Downward Looking Telescope Seismic waves are being recorded in more detail than ever before. In this latest collaboration with the NASA Deep Space Network (DSN), researchers from The ANU and AuScope’s Earth Imaging and Sounding Program explain Distributed Acoustic Sensing (DAS) infrastructure .
Geophysics Probing the Australian-Pacific Plate Boundary: Macquarie Ridge in 3D (Updated) A team of Australian researchers are about to set off on a landmark voyage to discover more about the Earth beneath our oceans, and what triggers underwater earthquakes. Read live updates of the cruise as they go — both personal reflections and scientific background to the cruise.
Geodynamics High mantle seismic P-wave-speeds as a signature for pancake-like flow in the upper mantle Buoyant material rising in the Earth's mantle is expected to spread out when it reaches the base of a tectonic plate like pancake batter dropped into a pan.
Seismology Seismic Fly-past of the Century The Australian Air Force flew 100 years of aircraft through the centre of Canberra on March 31st and we recorded their seismic signal from the Parliament House Basement
Seismology The inherited structures within the Australian lithosphere define the tectonic evolution along the Banda arc Integration of passive seismic images, geochemistry, and reconstruction of uplift from river profiles provide new findings on arc-continent collisional processes
Geophysics Seismological Models, mineral physics and spin transitions in the lower mantle The dominant variation of the physical properties of the Earth is with depth, though complex 3-D structures are present in the top 1000 km and near the core-mantle boundary.
Geodynamics Do Australian earthquakes matter? People naturally focus on big news and Geo-scientists also pay more attentions to big earthquakes happening in plate boundaries rather than the 'boring' small earthquakes in stable continents. Does this mean the intraplate earthquakes are negligible in scientific research?
Seismology Imaging the full lithosphere with earthquake sources When the seismic waves from a distant earthquake arrive in the vicinity of a seismic recording station they interact with the local structure and produce a variety of minor contributions accompanying the main arrival of a seismic phase.
Seismology Probing the Australian-Pacific Plate Boundary (Pt 8: Sailing Home) Unlike Sirens, who drew sailors to the rocks by their enchanted singing, causing their ships to sink, Nereids – the daughters of Doris and Nereus, the old man of the sea
Geophysics Probing the Australian-Pacific Plate Boundary (Pt 7: The hunt for MRO21) When you are pressed for time, the only thing you hope for is for things to go as smoothly as possible so that you can move on.
Geophysics Shallow earthquakes in Australia The Earth’s crust is made up of tectonic plates that are constantly in motion. Large, destructive earthquakes occur when accumulated energy at plate boundaries - where two plates are pushing against each other - is suddenly released.
Seismology Probing the Australian-Pacific Plate Boundary (Pt 6: A race against time in sub-Antarctic waters) ... probably the most challenging feature in the global ocean on which to deploy ocean bottom seismometers, which need to land onto a relatively flat surface ...
Geophysics Probing the Australian-Pacific Plate Boundary (Pt 5: Underwater array observatory at the Macquarie Ridge) Three and a half days after our departure from Hobart, we arrived in just northeast of the Macquarie island and instantly proceeded with swathing – mapping the ocean floor in the north-eastern quadrant, in lines parallel to the Macquarie ridge.
Geodynamics On the destructive tendencies of cratons Katie Cooper, Rebecca Farrington and Meghan Miller explain how cratonic lithosphere can be sculpted by flow from a passing subducting slab.
Seismology Probing the Australian-Pacific Plate Boundary (Pt 4: What lies beneath ?) A violent earthquake roared and rumbled through the underworld of a distant corner of the planet covered by the restless ocean, far enough from any soul to be felt or heard.
Opinion Probing the Australian-Pacific Plate Boundary (Pt 3 — A voyage to the furious fifties) “Below 40 degrees south there is no law, and below 50 degrees south there is no God."
Seismology Probing the Australian-Pacific Plate Boundary (Pt 2 — On the Deck) We (the team of 9 scientists and technicians from the Australian National University’s Research School of Earth Sciences) are out of strict 2-week quarantine and ready for a pre-voyage
