Older Query and Retrieval Methods
These older methods of querying our archives and downloading waveform data are still supported by the NCEDC. However, users (especially new users) are encouraged to use SeismiQuery for querying our waveform data archives and Web Services for retrieving data.
Querying the Archives: NetDC System
The NCEDC has collaborated with the IRIS Data Management Center on the development of tools to link seismological data centers. The Networked Data Centers (NetDC) system is one example. The NCEDC implemented NetDC and developed a simple form which allows users to make inquiries about the availablility/inventory of waveform data at the NCEDC.
Waveform Data Retrieval: NetDC System, EVT_FAST, BREQ_FAST, and STP
The NCEDC's older NetDC system provides a simple tool for requesting waveform data.
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