NET-VISA: Network Processing Vertically Integrated Seismic Analysis
نویسندگان
چکیده
The automated processing of multiple seismic signals to detect and localize seismic events is a central tool in both geophysics and nuclear treaty verification. This paper reports on a project begun in 2009 to reformulate this problem in a Bayesian framework. A Bayesian seismic monitoring system, NET-VISA, has been built comprising a spatial event prior and generative models of event transmission and detection, aswell as an inference algorithm. The probabilisticmodel allows for seamless integration of various disparate sources of information. Applied in the context of the International Monitoring System (IMS), a global sensor network developed for the Comprehensive Nuclear Test Ban Treaty (CTBT), NET-VISA achieves a reduction of around 60% in the number of missed events compared with the currently deployed system. It also finds events that are missed by the human analysts who postprocess the IMS output.
منابع مشابه
Global Seismic Monitoring: A Bayesian Approach
The automated processing of multiple seismic signals to detect and localize seismic events is a central tool in both geophysics and nuclear treaty verification. This paper reports on a project, begun in 2009, to reformulate this problem in a Bayesian framework. A Bayesian seismic monitoring system, NET-VISA, has been built comprising a spatial event prior and generative models of event transmis...
متن کاملGlobal seismic monitoring as probabilistic inference
The International Monitoring System (IMS) is a global network of sensors whose purpose is to identify potential violations of the Comprehensive Nuclear-Test-Ban Treaty (CTBT), primarily through detection and localization of seismic events. We report on the first stage of a project to improve on the current automated software system with a Bayesian inference system that computes the most likely ...
متن کاملProgress in Signal-based Bayesian Monitoring
Localization tools such as the CTBTO's GA (Global Association) system work by analyzing detections of arriving phases; these detections constitute a discretized, thresholded summary of information from the underlying seismic waveforms. By contrast, our SIG-VISA (SIGnal-based Vertically Integrated Seismic Analysis) system operates directly at the level of the raw waveforms or envelopes, applying...
متن کاملMachine Learning at the Ctbto. Testing, and Evaluation of the False Events Identification (fei) and Vertically Integrated Seismic Association (visa) Projects
Since 2009, an initiative to investigate the potential of machine learning methods to improve automatic data processing at the CTBTO and in particular the recall and accuracy of the automatic bulletins is starting to bear fruit beyond the stage of research and has entered the domain of development and testing with the goal of operational testing for one of the projects (FEI) by the end of 2011....
متن کاملA Comparative Study of the Neural Network, Fuzzy Logic, and Nero-fuzzy Systems in Seismic Reservoir Characterization: An Example from Arab (Surmeh) Reservoir as an Iranian Gas Field, Persian Gulf Basin
Intelligent reservoir characterization using seismic attributes and hydraulic flow units has a vital role in the description of oil and gas traps. The predicted model allows an accurate understanding of the reservoir quality, especially at the un-cored well location. This study was conducted in two major steps. In the first step, the survey compared different intelligent techniques to discover ...
متن کامل