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
- 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]
... on a project in where we want to display seismic data in real-time. We are interested in two statio...
- What does the M, D, R, or Q character mean in my data file name? [Article]
This is a quality control marker. M = Merged data, a new post-processing scheme being implemented at IRIS DMC to present clean data traces from multi
- How do I check what data is available from the DMC? [Article]
The best way to check on data availability is to use our on-line database access tool SeismiQuery. SeismiQuery offers several different q
- SAC format [Article]
Q: What is the SAC format A: 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
- 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 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 decrypt restricted data? [Article]
IRIS routinely distributes restricted data sets to authorized users in encrypted format to ensure the data remains in a private access domain for the time period of the access restriction. Authorized ...
- What is the simplest DMC Request Tool to use [Article]
Q. I just want to make a simple request for data from a few stations for one time period. What is the best DMC Request Tool to use?
A.
- Where can I find information on recent earthquakes? [Article]
Recent Earthquakes are listed on the IRIS homepage. You can also view a list of
- What is SEED? [Article]
...arthquake Data (SEED) is an international standard format for the exchange of digital seismological data. SEE
- Generate a Summary File Using JWEED [Article]
...ed the SEED file that I requested, how can I add the .summary file when using rdseed to extract the data. I want to add the summary file because I want the output .
- How to I find the coordinates for stations? [Article]
Q: I have made a request about the data of South Sumatra earthquake on 25th July 2004, where the data consists a part of XE stations. I have looked up this Network code in fdsn.org, but I can
- Received a "no data" message when requesting data [Article]
Q: I received a "no data" message when requesting data from the DMC but I checked the database and I know that the station was running at the time for which I requested data. What went wrong?
- Stations recording data during a specific event [Article]
Q: I need to know which stations were recording data during a specific event. How do I do that? A: Select the ‘timeseries’ tab in
- 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...
- 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
- 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 ...
