A Short Introduction to the IRIS Data Management

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

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

The IRIS Data Management System Network Ops Data QA ASL DCC KZNet Almaty IDA DCC DMC Uof. W Data QA KNET Bishkek

Data Sources Earth. Scope IRIS GSN USArray PBO DMC SAFOD PASSCAL US Regional Networks FDSN Non-FDSN Networks

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

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

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

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

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

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

Data Request Tools at the IRIS DMC

Request Methods

Networking Data Centers by Email • • 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 Net. DC node can act as a hub data center Or FDSN. ORG can be used Net. DC Request SCEDC USA ORFEUS Netherlands NCEDC USA CNSN Canada FDSN. ORG IRIS DMC USA PACIFIC 21 Japan GEOSCOPE France Med. Net Italy

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

DHI Enabled Centers Existing Planned (Events)

DHI Enabled Centers- European Existing Planned (Events)

Real Time Data Flow from DMC BUD Buffer of Uniform Data Seed. Link Antelope Earthworm Seis. Gram 2 K Seiscomp 3 DHI VASE SOD j. Weed EMM DHI 2 mseed

The IRIS Data Management Center • Most of the 100 terabytes are in mini. SEED 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

A Global Resource • 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

Thanks for your attention