MILESTONES AND DEVELOPMENTS IN VOLCANO SEISMOLOGY JURGEN NEUBERG School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, U.K This talk focusses on some of the achievements that came out of the 29 years of history of the ESC working group in the context of other important milestones in volcano seismology. Starting with the reasons why the working group was initiated by Rolf Schick and Bruno Martinelli, the first milestone is listed as the deployment and the results of the first broadband seismic network on Stromboli. However, while nowadays broadband seismic sensors are widely available and deployed, very rarely is their wide frequency range adequately used in data monitoring and interpretation. The identification and modelling of low-frequency events is the next milestone where several groups contributed to potential models of trigger mechanisms and their relevance as a forecasting tool. The next milestone was the attempt of a multi-disciplinary approach providing mutual links between seismology, other geophysical monitoring techniques and also petrology and geology. A further milestone was the deployment of a dense seismic network in Iceland that resulted in an unprecedented data coverage and imaging of a dyke propagation at the Bardarbunga eruption. Finally, the developments of general volcano seismic models are considered in the context of hazard and risk analysis, and linked to the application of automated detection algorithms and machine learning.