International Federation of Digital Seismograph Networks

1. Introduction Membership Terms of Referemce Structure Publications Meetings Services Search International Federation of Digital Seismograph Networks www.fdsn.org

2. International Federation of Digital Seismograph Networks The FDSN • is the global organization that brings together the digital broad-band seismographic networks throughout the world. • has members that are responsible for the installation and maintenance of seismographs either within their geographic borders or globally. Membership in the FDSN is open to all organizations that operate more than one broadband station. The FDSN is not an inter-governmental organization. • was established in 1986 to support the establishment and deployment of new digital broad-band seismographic technology, primarily for scientific network. • coordinates global activities in station site selection, data format, data exchange, and instrumentation standardization. • has commission status within IASPEI (International Association of Seismology and Physics of the Earth’s Interior) and IUGG (International Union of Geodesy and Geophysics).

3. International Federation of Digital Seismograph Networks The FDSN • promotes the installation of modern, digital, high resolution, broad-band stations and continuous recording (at least a 20 sample per second sampling rate). • promotes inter-operability among infrastructures • promotes a variable-geometry approach, with a (geographically well distributed) backbone of over 300 globally distributed, high-quality stations, enhanced by a mosaic of national and regional networks • promotes the deployment of ocean-bottom seismic observatories, in cooperation with other international ocean programs, to complement the coverage of land-based seismic instrumentation • promotes open-data access: all FDSN member networks agree to open-data availability; each member contributes at least one station to the global archive and most members allow open access to waveform data at their data centers • promotes real-time access to data

4. International Federation of Digital Seismograph Networks The FDSN • maintains an advanced system of networked data centers to oversee the collection, archive and distribution of the continuous and event waveforms, with primary FDSN archive (repository) at IRIS DMS. • provides global monitoring of one of the most important natural hazards - earthquakes - and shares the GEOSS goal of achieving a global strategy for coordinated Earth observation; FDSN is a GEO participant, building the land-based component for one of the targets for the GEOSS 10-yr implementation plan. • helps scientists all over the world to further advance earth sciences, in particular the study of global seismic activity. • was involved in the development of a universal standard for distribution of broadband waveform data and related parametric information. The Standard for Exchange of Earthquake DATA (SEED) format is the result of that effort. • assigns network (permanent and temporary) code in order to provide uniqueness to seismological data streams.

5. FDSN Structure Chairman and Secretary ExeCom SteerCom Working Groups: I. Station Siting and Instrumentation II. Data, Format and Data Centers III. Products, Tools and Services IV. CTBT Coordination V. Portable instrumentation Annual assemblies Regional assemblies

6. FDSN Membership ASIA – PACIFIC OCEAN Australia - GA Azerbaijan China - CEA China - ICG Georgia - IG-ASG Indonesia Iran - IIEES Israel - GII Japan - ERI Japan - NEID Kazakhstan - IGR Kyrgyzstan - IVTAN/KAS Malaysia - MMD New Zealand - NZNSN Russia - GSRAS Taiwan - BATS Tajikistan - TDSN Thailand - TMD Uzbekistan - DSNU United Arab Emirates Dubai United Nations – CTBTO Pacific Ocean - PTWC AMERICAS Brazil - Un. Sao Paulo Canada - GSC Chile - Un. De Chile Colombia - OSSO Costa Rica - CREU Ecuador - IG Jamaica - JSN Mexico - UNAM Nicaragua - INETER Rico Puerto – PRSN USA - IRIS USA - USGS USA - SCSN USA - BDSN AFRICA Algeria - CRAAG (pending) Egypt - NRIAG South Africa Africarray EUROPE Austria - ASN Bulgaria - BAS Croatia - SNC Czech Republic - GI Denmark - GEUS Europe - ORFEUS Finland - Uni. Helsinki Finland - Uni.Oulo France - GEOSCOPE France - ReNaSS Germany - GEOFON Germany - SZGRF Greece - NOA Greece - Uni. Thessalon. Hungary - SO-HAS Iceland - IMO Italy - INGV Italy - OGS Macedonia - SO Netherlands - KNMI Norway - NORSAR Poland - PAS Portugal - IST Portugal - CGUL Romania - NIEP Slovakia - GPI-SAS Slovenia - EARS Spain - ROA Sweden - SNSN Switzerland - ETH United Kingdom - BGS

7. FDSN coverage 2007

8. 196 out of 300 available online at the FDSN primary archive in DMS

9. Regional versus global The future Earth coverage will depend increasingly on regional and national networks These - are supported for surveillance and alert, - often have more stable budget and recognition - are less interested in technical developments - require real-time data availability and processing - are less strict about VBB standards - participate less in FDSN activities - rarely have science under their mandate Extreme challenge to organize an efficient data exchange National priorities and requirements, restrictions to data access

10. Seismic stations in the Euro-Mediterranean 46 countries 150 infrastructures 800 BB stations 1800 SP stations 3000 SM stations

11. Distributed data management - EIDA European Integrated Data Center (EIDAC) - data archiving and distribution nodes

12. Global hierarchical Networked DC • Distributed data archives access: • NetDC • ArcLink • distributed database access

13. Visibility • Network identity and visibility – data provenance: • Both ORFEUS and IRIS aim at an approach to emphasize the • network and its contributions, and to encourage users to make • clear references to the data owners. • Each broadband network is identified by its FDSN registered • network code. • Current workflow developments aim at tracing the research to its • data sources.