Tim Ahern

The IRIS GSN and PASSCAL “Networks”

FDSN Archive for Continuous Data at the IRIS DMC

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

FDSN Network201 stations

FDSN Network201 stations

388 Permanent, 357 PASSCAL, 259 SEIS-UK, 84 SEISMOB-FR37 stations have real time telemetry

1,088 Stations in Africa & Middle East

Real Time with Metadata

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

The IRIS Global Seismographic Network156 Broadband Stations

• GSN• 156 Broadband stations

• 81 IRIS/USGS (IU) Stations

• 41 IRIS/IDA (II) Stations

• 10 IRIS/China (IC) Stations

• 9 USGS Caribbean (CU) Stations

• 9 AFTAC/IMS (IM) Stations

• 6 Affiliate Stations (AU, BK, CI, GT, MS)

The composition of the IRIS GSN

The Bandwidth of State-of-the-Art Instrumentation

Real Time Data Transmission nearly realizedReal Time Data Transmission nearly realized

Geophysical ObservatoriesGeophysical Observatories

Working Closely with the CTBTO/IMSWorking Closely with the CTBTO/IMS

Program for Array Seismic Studies of the Continental Lithosphere5163 PASSCAL Stations > 800 Experiments

Program for Array Seismic Studies of the Continental Lithosphere5163 PASSCAL Stations > 800 Experiments

PASSCAL Polar FA

Datalogger 3-channel 875 44 445

Datalogger 1-channel 983 1700

Broadband Sensor (>=120s) 469 44 327

Intermediate Period Sensor 142 6

Short-period sensor 170 100

High-frequency geophone 530 100

Accelerometer 20 20

Multichannel System 14 13

PASSCAL Equipment Inventory6,775 channels of data acquisition

Types of Equipment Supported by PASSCAL

Types of Equipment Supported by PASSCAL

• Data Loggers• 468 - RT130

• 491 - Q330

• Broadband Sensors• 220 - Streckheisen STS-2

• 560 - Guralp CMG-3T

• 42 - Nanometrics Trillium 240

• 2 - Nanometrics Trillium 120

• Intermediate Period Sensors• 90 Guralp 40T

• 16 Nanometrics T-40

• Short period sensors• 100 Guralp 40T (1 sec)

• 170 Sercel L22 (2hz)

Experiment SupportExperiment Support

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Training, Docs & WebTraining, Docs & Web

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All PIC Experiments Required to Attend Training 2-3 day intensive covering all aspects of deployment, data

recovery, and archiving Training continues in-field for all experiments that have PIC

personnel field support

Documentation Documentation frequently tailored to experiment. Examples of field deployment and service sheets

http://www.passcal.nmt.edu Access to PIC inventory Instrument specifications and comparisons Request forms and policies Instrument schedules Experiment profiles Software links

FieldField

Huddle Test Access equipment health Test recording parameters

Training Provide in-field training for all

participants Review best practices

Logistics Controlled Source

Start to finish Deploy and/or man field center

during deployment Produce field archive of raw data Create gathers if time permits

Passive Source Deploy at least during the initial

phase for continued training and best practice

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Himalayan Seismotectonics, Nepal

Data ArchivingData Archiving

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