Two ATM challenges were successfully performed in 2015 and 2016. However, they did not address the more practical aspect of estimating radioxenon background at selected IMS stations. This estimation is needed for calibration and performance assessment of the verification system as described in the Treaty. Estimating the radioxenon background is the main goal of the 3rd ATM Challenge. In the...
The completeness and accuracy of the CTBT Reviewed Event Bulletin (REB) is assessed in the Australian region through comparison with a local bulletin. We compare the REB to Australia’s National Earthquake Alerts Centre (NEAC) bulletin for all events in Australia between May 23rd and December 31st 2018. Australia is an intra-plate tectonic environment and as such experiences around 100...
The primary seismic network of the International Monitoring System (IMS) forms the backbone of the CTBT verification regime. The average event detection capability of the primary seismic network is estimated to be within the range mb 3.1 to 3.4 for the northern hemisphere, and between mb 3.4 and 3.7 for the southern hemisphere. However, it is understood that the detection threshold can vary...
