What is Restricted Data? [Article]
Q: What is Restricted Data? A: An important function of the DMC is to collect data, sort it, and make it readily available to a wider research community, especially with short-term temporary e
- How do I decrypt restricted data? [Article]
IRIS routinely distributes restricted data sets to authorized users in encrypted format to ensure th...
- How do I request restricted data? [Article]
...stigators (PIs) and get a password. You can find the names of participating PIs by viewing the meta data for assembled data or temporary ne
- SAC file format [Article]
A SAC formatted data file generally contains a single, contiguous segment of time-series data structured as a header section followed by floating point data values. The SAC file format can be eit
- What are Data Products? [Article]
Data products derived from raw data are produced both by the scientific community and the IRIS DMC. These complement the simple data products based on raw data such as event segmented waveforms, which...
- USArray Ground Motion Visualizations [Article]
As earthquake waves radiate out from the epicenter and encounter Earth's surface, they cause the ground to move. Unless the earthquake is nearby, the scale of these motions are too small and occu
- What is UTC? [Article]
UTC stands for Coordinated Universal Time. It is a time standard based on International Atomic Time (TAI) with leap seconds added at irregular intervals to compensate for variation in the Eart
- What is a dataless SEED volume? [Article]
A dataless SEED volume contains the metadata for a request only, including instrument responses, instrument coordinates, compression type, etc.. This dataless volume can be used in combination with a ...
- How to request data in SAC format [Article]
User Question: I was wondering how I can request data in SAC format? In the BREQ_fast request description there is no option for SAC. Answer: Usin
- How can I create my own dataless SEED? [Article]
A dataless SEED volume contains the metadata for a request only, including instrument responses, instrument coordinates, compression type, etc. Getting a Dataless SEED File: 1. Genera
- What is a blockette? [Article]
Blockette - a data structure consisting of an identification code, a length specification and a sequence of related data fields. Formatted blockettes are used in control headers and unformatted blocke...
- NetDC request [Article]
NetDC- is a data request system that allows a user to request seismological information from multiple data centers through a single email mechanism. Information is delivered to the user through email ...
- What is the difference between assembled and customized data? [Article]
Assembled Data Some data comes to the DMC in a format other than SEED, such as SEG-Y or SAC. These data are considered "assembled" because they are unique to a project or experiment and are no
- How do I get station response information? [Article]
Station response information is part of the SEED data format. You can extract responses from a SEED volume using rdseed OR you can view response information directly from our database using
- How do I get data from stations near an event? [Article]
Q: I only want data from stations that are a certain distance from an event. How do I do that? A: Use JWEED software to select stations within a defined area. JWEED
- Lunar seismic data request [Article]
User Question: I would like to download Lunar seismic data, but it doesn't appear on custom queries. Is there something special I have to do to request the data? Answer: The
- How can I request miniSEED data? [Article]
What is MiniSEED data? MiniSEED data is a stripped down version of SEED data which only contains waveform data. There is no station and channel metadata included. Getting a MiniSEED F
- What is MiniSEED? [Article]
This is a stripped down version of SEED data which only contains waveform data. There is no station and channel metadata included.
- Waveform Request Tools [Article]
Request Waveform Data Using BREQ_FAST
Batch access to the IRIS DMC archive can be obtained by electronically mailing a specially formatted file to the IRIS DMC in Seattle.
These ar
- Software for accessing real-time data [Article]
Q: I'm working on a project in where we want to display seismic data in real-time. We are interested in two stations to begin with 223.TA and 324.TA eventua
