By Tim Ahern, Program Manager IRIS DMS A “Short” Introduction to the IRIS Data Management Center Data Holdings, Data Organization, and Data Access

FDSN Archive for Continuous Data at the IRIS DMC FDSN Backbone Network 200 stations currently Plans to increase in size to 300 Africa and Middle East are underrepresented

DMCUofWASL DCCIDA DCC KZNet Almaty Data QA Network Ops Data QA KNET Bishkek Data QA The IRIS Data Management System

DMC GSN PASSCAL US Regional Networks Non-FDSN Networks FDSN USArray PBOSAFOD EarthScope IRIS Data Sources

More than 12,007 seismic stations from 248 networks/deployments have data available through the IRIS DMC

388 Permanent, 357 PASSCAL, 259 SEIS-UK, 84 SEISMOB-FR 37 stations have real time telemetry 1,088 Stations in Africa & Middle East

1,920 Stations telemetered in real time from 73 different networks

Real Time with Metadata 37 Real Time Stations in Africa & Middle East Contributing to IRIS/FDSN

Seismological Broadband Seismometers Strong Motion Buildings Structures Free Field Geophones Hydrophones Meteorological Wind Speed Wind Direction Temperature Humidity Rain Gauge Solar Radiaton Insolation/ Pyranometer Microbarograph Relative/Absolute Infrasound microphones Geophysical Magnetotelluric Magnetometer Electric Field Strainmeter dilatational tensor Tidal Pendulum Gravimeter conventional superconducting Tiltmeter Creep Meters Geophysical Magnetotelluric Magnetometer Electric Field Strainmeter dilatational tensor Tidal Pendulum Gravimeter conventional superconducting Tiltmeter Creep Meters Water Column Water Current Depth Temperature Water Level Water Column Water Current Depth Temperature Water Level Types of Sensor Data IRIS manages

IRIS Archive at 100 terabytes and growing at 24 terabytes per year

Data Request Tools at the IRIS DMC

Request Methods

Routes user requests between data centers Wraps normal Data Center operations within an application layer Coordinates delivery of information back to a user Peer based system Any NetDC node can act as a hub data center Or FDSN.ORG can be used IRIS DMC USA ORFEUS Netherlands CNSN Canada PACIFIC 21 Japan MedNet Italy GEOSCOPE France NCEDC USA NetDC Request SCEDC USA FDSN.ORG Networking Data Centers by

Network Waveforms Events DHI Data Center DHI Clients VASE SOD jWEED etc. Network Waveforms Events DHI Data Center Network Waveforms Events DHI Data Center Network Waveforms Events DHI Data Center IDL Data Handling Interface (DHI) Access to Distributed Data Centers

Existing Planned Planned (Events) DHI Enabled Centers

Existing Planned Planned (Events) DHI Enabled Centers- European

BUD Buffer of Uniform Data DHISeedLink AntelopeEarthworm SeisGram 2K VASESODEMMjWeed Seiscomp3DHI2 mseed Real Time Data Flow from DMC

Most of the 100 terabytes are in miniSEED format Metadata has been provided in dataless SEED format The huge holdings are consistent and complete due to adherence to FDSN standards Data from 102 different seismic networks 12,007 stations 1,920 stations in 73 networks in real time as of 2009 The IRIS Data Management Center

The IRIS DMS is available to all seismologists at the same priority level All data are open There is no charge for any of IRIS services Only one piece of software has limited distribution Antelope only available to Full IRIS Members SAC available to almost all seismologists A Global Resource

Thanks for your attention