Tim Ahern

1
The International Federation of Digital
Seismographic Networks (FDSN) Building
International Collaborations

• by
• Tim Ahern
• Program Manager, IRIS Data Management System
• Managing Waveform Data and Related Metadata for
  Seismic Networks
• Petaling Jaya, Malaysia
• October 21-26, 2007

2
Overview of the Talk

• The FDSN
• The History of the FDSN
• FDSNs Role in International Coordination
• Membership
• Goals
• FDSN Network
• Data Exchange at many Levels
• Real Time Data Exchange
• Distribution of Data
• Coordination at many scales using standards

3
The Reason the FDSN was Formed

• In the early 1980s broadband seismology was in
  its infancy
• The scientific problem was global
• Costs were high
• No one country could build a global network by
  itself
• The FDSN was formed to address the above
  situation
• Bottoms Up
• Lead by leaders in seismology

4
FDSN Goals

• Coordination of the siting of seismic stations
• 2000 km spacing in the FDSN Backbone
• Higher density Regional Networks
• Establishment of standards in instrumentation
• 24 bit, 20 sample per second continuous
• Broadband
• (World Wide Long Period and World Wide Short
  Period channels can be derived from a single a
  stream)
• Establishment of Data Exchange Formats
• S.E.E.D. Standard for the Exchange of Earthquake
  Data
• Providing Open Access to Data
• The FDSN Network
• Promotes Near Real time data access
• Access to Quality Controlled Data with minimum
  delay

5
Originally 12 FDSN Members1986- 1988

• Australia,
• Canada,
• China(SSB),
• France,
• Germany(GRF),
• Italy,

• Japan,
• Netherlands,
• Soviet Union,
• United Kingdom,
• United States
• (IRIS/USGS)

6
FDSN Membership in 2007 66 institutions in 53
countries

• Jamaica
• Japan (ERI NEID)
• Kazakhstan
• Macedonia
• Malaysia
• Mexico
• Netherlands
• New Zealand
• Nicaragua
• Norway
• Poland
• Portugal (CGUL IST)
• Romania
• Russia
• Slovakia
• Slovenia
• South Africa
• Spain
• Sweden

• Australia
• Austria
• Brazil
• Bulgaria
• Canada
• Chile
• China (CSB CAS)
• Columbia (Ingeominas Osso)
• Costa Rica
• Croatia
• Czech Republic
• Denmark
• Ecuador
• Egypt
• European Union (ORFEUS)
• Finland (Helsinki Sodankyla)
• France (Geoscope ReNaSS)
• Georgia
• Germany (GEOFON GRSN)

Yellow indicates countries that have contributed
to the FDSN Archive Orange indicates countries
that have agreed to contribute soon
7
FDSN Organizations

• Host
• MMD (Malaysia)
• Co Sponsors
• IASPEI
• JAMSTEC (Japan)
• GNS (New Zealand)
• IRIS (USA)

• FDSN Participants
• Australia
• China
• Germany
• Indonesia
• Japan
• Malaysia
• Netherlands/ORFEUS
• New Zealand
• Russia
• Taiwan
• Thailand
• Uzbekistan
• USA

8
Non-FDSN Organizations

• Other Participants
• Bangladesh
• India
• Nepal
• Papua New Guinea
• Philippines
• Sri Lanka
• Vanuatu
• Vietnam

Consider Joining the FDSN http//www.fdsn.org/FDSN
memberInfo.htm
9
FDSN Network - 300 stations199 at FDSN Archive
(IRIS DMC) with 106 in real time
28 contributing networks
10
Coordination at Different Scales
FDSN Network Global
IRIS
11
Real time data reception
1659 Stations telemetered in real time from 67
different networks (7000 channels)
NEIC About 700 stations on a normal day 925
stations 4237 channels received in the last 60
days
12
Real Time Data Management Effective Integration
into the Existing IRIS Real Time System from 67
Networks
13
Real time data distribution
BUD
SeedLink
DHI
LISS
autoDRM
14
Distributed Request Servicing

• NetDC - email based
• Data Handling Interface - API
• Web Services
• WSDL/SOAP/XML
• REST
• OGC Web Mapping Services

15
Linking Global Data Centers
16
Shipments by Year from FDSN Archive _at_ IRIS
17
Shipments from the IRIS DMC
250,000 customized shipments
67,000 on-line shipments
25.0 terabytes of observational data (6.34
megabits/second)
Data Access of Several Types
18
The Purpose of this Workshop

• Introduce the theory behind seismometry and
  signal processing
• Promote the use of FDSN standards for data
  exchange
• Introduce tools that help you meet the FDSN
  metadata standards
• Meet other seismologists working in this region

19
Thank you for your attention