Frequency-magnitude statistics for natural hazards can greatly help in probabilistic hazard assessments. An example is the case of earthquakes, where the generality of a power-law (fractal) frequency-rupture area correlation is a major feature in seismic risk mapping. Other examples of this power-law frequency-size behaviour are landslides and wildfires. In previous studies, authors have made t...

With growing world population and concentration in urban and coastal areas, the exposure to natural hazards is increasing and results in higher risk of human and economic losses. Improving the identification of areas, population and assets potentially exposed to natural hazards is essential to reduce the consequences of such events. Disaster risk is a function of hazard, exposure and vulnerabil...

Campi Flegrei (Italy) is among the areas with greatest volcanic explosive risk in world due to dangerousness of expected hazards, high exposed value (about 500,000 people will be evacuated during “alarm phase”), and vulnerability urban settlements under effect phenomena. The last two dramatic bradyseism phases occurred 1969–1972 1982–1984 when Pozzuoli town was affected by rapid ground inflatio...

A calibrated radiocarbon database of late Quaternary volcanic eruptions R. U. Bryson, R. A. Bryson, and A. Ruter National Park Service, Mojave National Preserve, 2701 Barstow Road, Barstow, CA 92311, USA Center for Climatic Research, University of Wisconsin-Madison, 1225 W. Dayton St., Madison, WI 53706, USA Received: 24 May 2006 – Accepted: 17 July 2006 – Published: 25 July 2006 Correspondence...

Abstract Recent advances in satellite technologies, statistical and mathematical models, computational resources have paved the way for operational use of data monitoring forecasting natural hazards. We present a review Earth observation context geohazards preventive disaster evaluation assessment. describe techniques exploited to extract ground displacement information from radar sensor images...

In this paper, we present a physics motivated modeling method for volcanic clouds as a two fluids model. Some previous methods model smoke or clouds as one fluid, but the volcanic clouds can not be treated as one fluid. The volcanic clouds consist of the pyroclasts, the volcanic gas and the entrained air. Since the pyroclasts and the volcanic gas can be treated as one fluid, called magma, the v...

Abstract Estimating rates of occurrence over time hazards such as volcanic eruptions and earthquakes is crucial for risk assessment planning. But it can be difficult. Human records only go back so far, older ones may patchy, making hard to pinpoint the start “reliable history” a particular type event. Fear not, though, says Jonathan Rougier: simple event-rate estimator might still hold up, even...

Hazard assessment for infrastructure proximal to a volcanic vent raises issues that are often not present, or as severe in hazard assessments more distal infrastructure. Proximal regions subject greater number of hazardous phenomena, and variability impact intensity increases with the magnitude. To probabilistically quantify infrastructure, multiple hazards their effects on exposed elements nee...