Summary

The Collaboratory for the Study of Earthquake Predictability (CSEP) develops global cyberinfrastructure for the blind evaluation of earthquake forecasting models and prediction algorithms. CSEP thereby contributes to an objective and independent assessment of the predictive power of scientific hypotheses about earthquake occurrences, some of which underpin operational forecasts issued by agencies like the USGS and others around the world. This 2024 workshop successfully brought together CSEP, USGS and SCEC scientists from around the globe to advance earthquake forecasting and testing. The first session focused on ongoing CSEP activities and evaluations in California, China, Italy and New Zealand. A major focus is the evaluation of 24-hour earthquake forecast models in California over the period 2007-2018, which was a major CSEP initiative. The second session looked further into the future, with presentations ranging from machine-learning based forecasts and insights into predictability of low frequency earthquakes on the central San Andreas fault. Participants also discussed the required computing re-sources for future CSEP activities and software for visualizing USGS operational forecasts.