Ansie Smit

Extension of the Aki‐Utsu b‐Value Estimator for Incomplete Catalogs

The Aki (1965) maximum likelihood estimate of the Gutenberg–Richter b ‐value is extended for use in the case of multiple catalogs with different levels of completeness. The most striking feature of this newly derived estimator is its simplicity—it is more manageable than the well‐known and already easy to use Weichert (1980) solution to the analogs problem. In addition, confidence intervals for the newly derived estimator are provided.

Are Earth Sciences lagging behind in data integration methodologies

This article reflects discussions German and South African Earth scientists, statisticians and risk analysts had on occasion of two bilateral workshops on Data Integration Technologies for Earth System Modelling and Resource Management. The workshops were held in October 2012 at Leipzig, Germany, and April 2013 at Pretoria, South Africa, and were attended by about 70 researchers, practitioners and data managers of both countries. Both events were arranged as part of the South African-German Year of Science 2012/2013. The South African National Research Foundation (NRF, UID 81579) has supported the two workshops as part of the South African–German Year of Science activities 2012/2013 established by the German Federal Ministry of Education and Research and the South African Department of Science and Technology.

Probabilistic tsunami hazard assessment from incomplete and uncertain historical catalogues with application to tsunamigenic regions in the Pacific Ocean.

The paper presents a new method for empirical assessment of tsunami recurrence parameters, namely the mean tsunami activity rate

Estimation of the Frequency–Magnitude Gutenberg–Richter b‐Value without Making Assumptions on Levels of Completeness

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Vulnerability mapping as a tool to manage the environmental impacts of oil and gas extraction

λT, the Soloviev–Imamura frequency–magnitude power law

Estimation of earthquake hazard parameters from incomplete data files. Part III. Incorporation of uncertainty of earthquake-occurrence model

b_{\text{T}}