In the land of hobitss where the slow slip events lie

Continuous GPS campaigns over the last few decades have brought an unprecedented look into the behaviors and processes that drive subduction zones. A major discovery during this time has been Slow Slip Events, which release tectonic stress over longer periods than earthquakes. Although slow slip occurs in a variety of places along a subduction interface, a particular place of interest are those slow slip patches that occur offshore and near the subduction trench since these may trigger damaging tsunami earthquakes. While onshore GPS have been able to model these offshore events with some resolution, offshore resolution is always limited with onshore geodetic networks. Recent advances in geodesy have placed seafloor geodetic instruments directly above the slipping patches. I evaluate the time-dependent behavior and range of potential seismic moments of slow slip event that took place offshore Gisborne New Zealand in 2014 while incorporating realistic elastic properties and co-inverting onshore and offshore instruments. The results indicate a significant decrease in uncertainty when using the offshore data while the heterogenetic properties result in an increase. While the realistic elastic properties show a decrease in peak during the slow slip event, they create a higher seismic moment. In addition, the addition of offshore data moves the onset of the event several days sooner and significantly increases the most likely seismic moment. The study showcases the use of newly available seafloor geodetic data for resolving offshore deformation.Includes bibliographical reference

Why the Early Paleozoic was intrinsically prone to marine extinction.

The geological record of marine animal biodiversity reflects the interplay between changing rates of speciation versus extinction. Compared to mass extinctions, background extinctions have received little attention. To disentangle the different contributions of global climate state, continental configuration, and atmospheric oxygen concentration (pO2) to variations in background extinction rates, we drive an animal physiological model with the environmental outputs from an Earth system model across intervals spanning the past 541 million years. We find that climate and continental configuration combined to make extinction susceptibility an order of magnitude higher during the Early Paleozoic than during the rest of the Phanerozoic, consistent with extinction rates derived from paleontological databases. The high extinction susceptibility arises in the model from the limited geographical range of marine organisms. It stands even when assuming present-day pO2, suggesting that increasing oxygenation through the Paleozoic is not necessary to explain why extinction rates apparently declined with time

Later Pleistocene Middle Awash cercopithecids and comparative data

This dataset is associated with three papers published in the American Journal of Biological Anthropology: Brasil et al., 2022a, 2022b, and Taylor et al., 2022. The dataset includes all of the cercopithecid fossils from the Middle Awash study area that are described in these three papers, as well as all of the comparative individuals included in analyses. </p

Why the Early Paleozoic was intrinsically prone to marine extinction

International audienceThe geological record of marine animal biodiversity reflects the interplay between changing rates of speciation versus extinction. Compared to mass extinctions, background extinctions have received little attention. To disentangle the different contributions of global climate state, continental configuration, and atmospheric oxygen concentration ( p O 2 ) to variations in background extinction rates, we drive an animal physiological model with the environmental outputs from an Earth system model across intervals spanning the past 541 million years. We find that climate and continental configuration combined to make extinction susceptibility an order of magnitude higher during the Early Paleozoic than during the rest of the Phanerozoic, consistent with extinction rates derived from paleontological databases. The high extinction susceptibility arises in the model from the limited geographical range of marine organisms. It stands even when assuming present-day p O 2 , suggesting that increasing oxygenation through the Paleozoic is not necessary to explain why extinction rates apparently declined with time