WebDC - Integrated Seismological Data Portal
Common Data Portal for GFZ Potsdam, German and European Seismological Data Archives
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About WebDc

WebDc is a portal to the EIDA infrastructure. Using this portal you can request

  1. seismological data (waveform) and
  2. station lists (Dataless SEED, Inventory XML)

from different data centers spread across Europe.

For creating requests, the portal allow you to combine the stations' locations with earthquake lists provided by GFZ (Germany) or by USGS (United States of America). In this case time and coordinates of the events are used to compute approximated arrival time for the P-wave of the selected earthquakes at the selected stations.

WebDC ArcLink data requests can also be done through BREQ_FAST email sent to breq_fast@webdc.eu or using the arclink_fetch program.

1. Waveform Data

We offer you the choice of downloading Mini-SEED or Full SEED volumes that can be easily converted to major seismological formats using the rdseed tool.

For restricted datasets, some data centers (GEOFON) deliver encrypted data. For those cases it is necessary to first decrypt the received data using the password that you will receive in your email. The decryption can performed by using the OpenSSL tool available on most Linux distributions. For decrypting your data use the following command:

  openssl des-cbc -pass pass:{Your Password} -in {Input File} -out {Output File} -d

If your password contains symbols we would recommend that you quote your password (using single quotes) on the command line by using this line instead.

  openssl des-cbc -pass pass:'{Your Password}' -in {Input File} -out {Output File} -d

2. Dataless SEED / Inventory (XML)

Dataless SEED and Inventory XML are formats that contains only the station information. They can be used to obtain information like coordinates, names, codes or even instrument responses for certain stations or networks.

Dataless SEED files can be decoded by the rdseed program, while the inventory XML is a plain text file that can be inspected by any text editor, but it is recommended to use a real generic XML parser to extract the desired information from an inventory XML file.

A quick tool that allow you to convert the XML files to a more linear format is the xml2 tool.