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Waveform Data Access Tools | Acknowledging/Citing the NCEDC | Help & Documents

 

Retrieving waveform data

Web Services

The NCEDC has created a new set of FDSN-compliant web services to access data at the NCEDC. Web services provide simple functions that can be used from a web browser, command-line programs such as curl and wget, dedicated clients, and through programming languages such as perl, python, shell scripts, or MATLAB.

Web Services retrieve data in miniSEED format (no instrument response metadata). Instrument response metadata can be retrieved through web services as dataless seed (readable with rdseed), resp file format, or station XML. Full network IR metadata is available in our network directories

 

SWC

The Simple Waveform Client (SWC) is a command-line program for easily dowloading waveform retrieval from the NCEDC Archive and NCEDC DART (Data Available in Real Time). Download SWC

SWC retrieves data in miniSEED format (no instrument response metadata). Instrument response metadata can be retrieved through web services as dataless seed (readable with rdseed), resp file format, or station XML. Full network IR metadata is available in our network directories

 

DART (Real-Time Data)

DART (Data Available in Real Time) is a buffer of real-time telemetry MiniSEED data that is accessible through SWC or Web Services, or through a filesystem accessible through the web. miniSEED format has no instrument response metadata. Instrument response metadata can be retrieved through web services as dataless seed (readable with rdseed), resp file format, or station XML. Full network IR metadata is available in our network directories

 

STP

The Seismogram Transfer Program or STP is a simple client-server program, developed at the SCEDC. Access to STP is either through a simple direct interface that is available for Sun or Linux platforms, or through a GUI Web interface. With the direct interface, the data are placed directly on a user's computer in several possible formats, with the byte-swap conversion performed automatically. With the Web interface, the selected and converted data are retrieved with a single FTP command. The STP interface also allows rapid access to parametric data such as hypocenters and phases.

A command-line STP client program, tested under Solaris (Unix) and Linux, can be downloaded from the directory

/ftp/pub/programs/stp/

STP retrieves data in full SEED format (data and instrument response metadata). The program rdseed will extract station/channel instrument responses, and convert the waveforms into other user formats such as miniSEED.

 

Email-based tools: NetDC System, EVT_FAST, and BREQ_FAST

The NCEDC's older NetDC system provides a simple tool for requesting waveform data.

Help using the NetDC request form is available here.
Examples of NetDC requests are here.
NetDC requests may also be submitted by email to netdc@ncedc.org.

Data from the NC network is available over the Web using a request form:

The Seismogram Transfer Program or STP is a simple client-server program, developed at the SCEDC. Access to STP is either through a simple direct interface that is available for Sun or Linux platforms, or through a GUI Web interface. With the direct interface, the data are placed directly on a user's computer in several possible formats, with the byte-swap conversion performed automatically. With the Web interface, the selected and converted data are retrieved with a single FTP command. The STP interface also allows rapid access to parametric data such as hypocenters and phases.

A command-line STP client program, tested under Solaris (Unix) and Linux, can be downloaded from the directory

/ftp/pub/programs/stp/

NetDC System, EVT_FAST, and STP retrieve data in full SEED format (data and instrument response metadata). The program rdseed will extract station/channel instrument responses, and convert the waveforms into other user formats such as miniSEED.

 

 

Acknowledging/Citing the NCEDC

When you use data from this data center, please acknowledge both the Northern California Earthquake Data Center (NCEDC) and the organization(s) that contributed the data to the NCEDC.
Table of contributing organizations