Recent advances in the Lesser Antilles observatories - Part 1 Jean-Marie Saurel, Frédéric Randriamora, Alexis Bosson, Thierry Kitou, Cyril Vidal, Marie-Paule Bouin, Jean-Bernard de Chabalier, Valérie Clouard, Alexandre Nercessian, François Beauducel
Jean-Marie Saurel, Frédéric Randriamora, Alexis Bosson, Thierry Kitou, Cyril Vidal, Marie-Paule Bouin, Jean-Bernard de Chabalier, Valérie Clouard, Alexandre Nercessian, François Beauducel
Lesser Antilles observatories are in charge of monitoring the volcanoes and earthquakes in the Eastern Caribbean region.
During the past two years, our seismic networks have evolved toward a full digital technology. These changes, which include modern three components sensors, high dynamic range digitizers, high speed terrestrial and satellite telemetry, improve data quality but also increase the data flows to process and to store. Moreover, the generalization of data exchange to build a wide virtual seismic network around the Caribbean domain requires a great flexibility to provide and receive data flows in various formats.
As many observatories, we have decided to use the most popular and robust open source data acquisition systems in use in today observatories community : EarthWorm and SeisComP.
The first is renowned for its ability to process real time seismic data flows, with a high number of tunable modules (filters, triggers, automatic pickers, locators). The later is renowned for its ability to exchange seismic data using the international SEED standard (Standard for Exchange of Earthquake Data), either by producing archive files, or by managing output and input SEEDLink flows.
French Antilles Seismological and Volcanological Observatories have chosen to take advantage of the best features of each software to design a new data flow scheme and to integrate it in our global observatory data management system, WebObs [Beauducel et al., 2004], see the companion paper (Part 2).
We assigned the tasks to the different softwares, regarding their main abilities :
Related papers: [Beauducel et al., 2004; Beauducel et al., 2010]