The reflection seismic method is the most frequently used exploration method for imaging and monitoring subsurface structures with high resolution. It has proven its qualities from the scale of regional seismology to the scale of near-surface applications that look just a few meters below the surface. The reflection method uses controlled active sources at known positions to give rise to reflections recorded at known receiver positions. The reflections’ two-wave travel time is used to extract desired information about and image the subsurface structures. When active sources are unavailable or undesired, one can retrieve body-wave reflections from application of seismic interferometry (SI) to sources of opportunity—quakes, tremors, ambient noise, or even man-made sources not connected to the exploration campaign. We show examples of imaging of subsurface structures using reflections retrieved from quakes and ambient noise. We apply SI by autocorrelation to global earthquake to image seismic and aseismic parts of the Nazca plate and the Moho at these places, SI by multidimensional deconvolution to P-wave coda from local earthquakes to image the Moho and the crust at the same places, and SI by autocorrelation to deep moonquakes to image the lunar Moho and to ambient noise to monitor CO2 sequestration. @en

Energy management systems and smart measuring devices at residential level have received significant research attention in the past years. Most of the technological developments designed for energy and/or cost savings employ real-time consumption monitoring, supervision and control. One of the possibilities that these kinds of systems provide to consumers is that they can give an overview of the energy consumption, which enables consumers to take advantage of the available information and take steps towards saving energy. The designs of such systems are based mostly on historical data and forecasting techniques of a household or a neighbourhood. This paper focuses on the analysis of electricity and heat profiles of a group of houses consisting of different housing types and resident categories. The effects of load flexibility are analysed, as well as the energy consumption profiles of electrical appliances; possible shifting of consumption periods are considered and discussed.@en