Seismological investigations of induced earthquakes near the Hutubi underground gas storage facility

Earth scientists have long known that fluid injected into the Earth’s crust can induce earthquakes. In principle, seismic activity may also be triggered through gas extraction through the mechanism of poroelastic stress perturbation, although such events have been observed less frequently. Read more

Minimal dynamical systems model of the Northern Hemisphere jet stream via embedding of climate data

Jet streams are narrow, fast-flowing westerly air currents located near the tropopause, the tropospheric boundary with the higher stratosphere. These jets play a major role in driving the large-scale atmospheric circulation and modulate the frequency, severity and persistence of weather events at middle latitudes. Read more

Spectral theory for the stability of dynamical systems on large oriented locally tree-like graphs

The linear stability of large complex systems around their stationary points can be studied with random matrix theory. In one common model, the i.i.d. random matrix model, one assumes a simple statistical form for the interactions between distinct elements of a network. Read more

New experiments back Ergodicity Economics over Expected Utility Theory in modeling human decision making

Economists thinking about anything from housing policy to climate change need to model how people make decisions, especially when facing uncertainty and risk. Read more

Interview with Marc Elsberg, author of the new German language novel Gier.

Economics had its critics even before the financial crisis of a decade ago. Since then doubt has grown over how much economists really know. Much of economics rests on analyses of how individuals – as consumers, or in managing a business, for example – make supposedly optimal decisions in uncertain situations. Read more

Bayesian approach for network adjustment for gravity survey campaign: methodology and model test

Variations in the strength of gravity over the Earth’s surface reflect underlying geophysical changes such as groundwater change, surface vertical deformation, tectonic events, earthquakes and other processes. To study such processes, so-called gravity survey campaigns collect observations made repeatedly at fixed stations. Read more

Data Science for Social Good (DSSG) Summer Fellowship programme

High-profile data horror stories are becoming increasingly common, from Facebook’s relationship with Cambridge Analytica to the leak of UK diplomatic cables and massive security breaches at some of the world’s biggest companies. Read more

Scale interactions and anisotropy in stable boundary layers

Some of the strongest challenges for numerical weather prediction come from the unsteady nature of certain flows, in particular nocturnal and stable boundary layers. Read more

Condensation of degrees emerging through a first-order phase transition in classical random graphs

When steam condenses from vapour into liquid, the water molecules move closely together and the system, from a mathematical point of view, comes to reside in an extremely small portion of the conceptually available phase space. Read more

Effective bandwidth of non-Markovian packet traffic

Telecommunications engineers and operations researchers aim to manage complex and fluctuating traffic flows through extended networks. Among other techniques, they have exploited results from the theory of large deviations to estimate the likelihood that a demand in service will overflow the available resources. Read more