STP service available at the NCEDC

December 4th, 2004

December 4th, 2004

The NCEDC is pleased to announce the availability of STP (Seismic Transfer Program) service, originally developed by the Southern California Earthquake Data Center (SCEDC). STP is a client-server system that provides timeseries data in various data formats such as SAC, MiniSEED, and V0 (engineering) format. In the future, the NCEDC STP server will also provide earthquake catalog information and related phase data.

An STP client can request timeseries by either channel name(s) and time interval or by eventid. When timeseries are requested by eventid, only those waveforms directly associated with the eventid by the NCEDC will be provided.

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

http://www.ncedc.org/ftp/pub/programs/stp/

Users should be be aware that the STP server performs some transformations on the raw timeseries. The STP server converts the raw timeseries into a uniformly sampled timeseries when delivering the timeseries to the STP client. If the STP server detects missing data or a time gap in the timeseries, it will supply a user-specified "missing value" to fill the gap in the timeseries. If the timeseries contains a negative timejump in the timeseries, the STP server may discard samples to create a uniformly sampled timeseries. STP may be best used to download event timeseries or relatively short segments from continuous timeseries.

A Web-based STP interface will be added in the future.

The NCEDC is a joint project of the University of California, Berkeley and the USGS. Please send us email at ncedcinfo@ncedc.org or fill out our comments form if you have questions or comments about these changes.

FISSURES framework implemented at the NCEDC

November 11th, 2004

November 11, 2004

We are pleased to announce that the BSL has implemented the FISSURES/DHI framework at the NCEDC. FISSURES is an IRIS project, led by the University of South Carolina.

Several FISSURES/DHI services have been implemented at the NCEDC and are available now:

Seismogram Service: (Waveform Information)

  • NCEDC_DataCenter
    • Continuous waveforms for BK,BP,CI,NC,NN,UL networks
    • Coming soon! Event waveforms for NCSN network (BK,CI,LA,NC,NN,NP,WR network codes)

Event Services: (Parametric Information)

  • BDSN_EventDC
    • BDSN catalogs from January 1984 to Present.
    • Coming soon! Historic BDSN catalogs from 1910 to 1984
  • NCSN_EventDC
    • NCSN catalogs from July 1966 to December 2002.
    • Coming soon! Current NCSN catalogs from 2003 to Present.

Network Service: (Instrument Responses)

  • NCEDC_NetworkDC
    • Instrument responses for networks AZ,BK,BP,CI,LB,NC,NN,NP,UL,US.
    • Coming soon! Instrument responses for WR network and completion of NN network

The NCEDC implementation supports the following FISSURES clients:

  • FISSURES

and in various IRIS newsletters:

  • Data Handling Infrastructure at the DMS
  • DMS Node Focus: University of South Carolina
  • Data Handling Interface for FISSURES
  • JEvalResp and JPlotResp versions 1.0 Released
  • FISSURES-Matlab interface

The NCEDC is a joint project of the University of California, Berkeley and the USGS. Please send us email at ncedcinfo@ncedc.org or fill out our comments form if you have questions or comments about these changes.

EVT_FAST now supports SEED format

November 11th, 2004

November 11, 2004

The NCEDC is very pleased to announce the availability of SEED and mini-SEED format output from the EVT_FAST data request tool. EVT_FAST is an email and Web-based tool for requesting event data recorded primarily by the Northern California Seismic Network.

The EVT_FAST email interface has been updated to support SEED and miniSEED output in addition to the original SAC binary, SAC ascii, and AH data formats. In addition, you may requests only selected data channels from these events on the basis of the SEED Station, Network, Channel, and Location codes. The EVT_FAST Web-based interface has also been updated to handle these enhancements.

The NCEDC is a joint project of the University of California, Berkeley and the USGS. Please send us email at ncedcinfo@ncedc.org or fill out our comments form if you have questions or comments about these changes.

NCSN data available in SEED format

November 11th, 2004

November 11, 2004

The NCEDC is very pleased to announce the availability of NCSN event waveform data in SEED format.

As a result, NCSN waveform data recorded since 3/1984* and associated metadata are now available through NCEDC tools such as:

In the near future, the NCSN event data will also be also be available with its SEED channel names through:

During 2003-2004, the NCEDC and NCSN finalized the CUSP-to-SEED channel mapping for the NCSN waveform. All of the hardware tracking and response information has been entered into the NCEDC database for the sites operated by the NCSN. Complete SEED responses for all of those data channels are now available from the NCEDC.

Additional work is required to collect, assemble, and verify the the instrument responses for data channels recorded by the NCSN at shared stations from contributing networks such as CA DWR, UNR, and SCSN. Until we have the correct instrument responses from the contributing networks, the NCEDC will provide a minimal SEED response that identifies these channels only as digital counts with unity gain so that timeseries data for these channels can be distributed in SEED format.

Completion of the NCSN SEED data coversion project has been a long, hard process. This project would not been completed without significant effort from USGS personnel Fred Klein, Gray Jenson, Bob Somera, Will Kohler, and David Oppenheimer and BSL/NCEDC personnel Doug Neuhauser and Stephane Zuzlewski. We are very grateful for their contributions to this project.

*Note:
The NCSN waveform archive consists primarily of earthquakes recorded and processed by the USGS CUSP system for the period 1984-2004. Earthquakes detected by systems other than the CUSP system result in phase and catalog entries at the NCEDC, but without waveforms. Waveforms should be available at the NCEDC for earthquakes with following range of NCSN event ID#'s:

         1  -30,999,999 
60,000,000 - 69,999,999

In addition to these event triggers, continuous data from the broadband stations operated by the NCSN are also available. The NCSN continues to perform Q/C on historic waveform data. If you find an event in the above range without waveforms, please send email at the address below.

The NCEDC is a joint project of the University of California, Berkeley and the USGS. Please send us email at ncedcinfo@ncedc.org or fill out our comments form if you have questions or comments about these changes.

Availability of Parkfield data

September 28th, 2004

September 28, 2004

The NCEDC is gathering data related to the 2004 Parkfield earthquake and making them available for researchers. Data are coming in now and will continue to be collected over the next few days and weeks.

Information about the available data is here:

2004 Parkfield earthquake data

The NCEDC is a joint project of the University of California, Berkeley and the USGS. Please send us email at ncedcinfo@ncedc.org or fill out our comments form if you have questions or comments about these changes.


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