Aspects of Nuclear Test Ban Verification which was held in Norway in February of this year. A total of 76 scientists and representatives from 21 countries participated in the Workshop. The working paper is contained in document CD/1010. The main theme of the Workshop was the role of regional seismic arrays in a test ban monitoring context. The participants were given an introduction to the two arrays of this tvpe installed in Norway, NORESS and ARCESS, and they also attended a demonstration of the associated computer processing and data analysis facilities. During a three-day scientific symposium, a total of 30 research papers were presented, addressing many of the outstanding problems and the state-of-the-art in seismic monitoring. In particular, several presentations focused on results using NORESS and ARCESS data, and the excellent capabilities of these arrays were clearly documented. A summary of the contributions is annexed to the working paper, and complete proceedings will be distributed to participants in the Group of Scientific Experts (GSE) later this year. At the time the Workshop took place, GSE was in the process of conducting its first preparatory data exchanges for its ongoing technical test, GSETT-2. We are encouraged by the results achieved so far during this test, as reported in the progress report from the twenty-ninth session of the GSE. We hope that at its forthcoming thirtieth session GSE will be able to report on further progress in this important undertaking. Norway is participating in GSETT-2 by contributing seismic data from both the NORESS and ARCESS regional arrays. In this connection I would like to recall Norway’s earlier proposal to the Conference on Disarmament contained in document CD/714, that the NORESS/ARCESS array concept could serve as standard for seismic stations within the global network as envisaged by GSE. We are confident that the results from GSETT-2 will confirm the important 
**Analysis**
The text discusses a scientific workshop held in Norway, focusing on the verification of nuclear test bans. It mentions the role of regional seismic arrays in monitoring and presents research papers on the state-of-the-art in seismic monitoring. The text also refers to a technical test, GSETT-2, and Norway's proposal to use the NORESS/ARCESS array concept as a standard for seismic stations. This suggests that the text is primarily related to scientific and technological issues, particularly in the field of nuclear non-proliferation.

**Category**
Science and technology