Antelope Compare
Version 2.0 (December 2013)

How to use OASIS


Access to OASIS

OASIS site data are free. Instead, OASIS waveform data undergoes some restrictions, and the access to these data is controlled by three different levels of permissions, i.e.:
  1. Level for internal OGS users. It allows free access to all OASIS data.
  2. Level devoted to project partners or registered users. It provides access to specific data-sets through login by username and password. Accounts for accessing specific subset of data are provided by sending motivated request to
  3. Level of free access. It provides access to the subset of data available with no constrains.
Data Availability
As a general rule, permanent network data are freely avaialable.
Instead, the availability of temporary network data is subordinate to the approval of the network/project leader.
A synthetic list of the available networks is displayed in Network Description.

Site Data

OASIS Sites allows searching the database that contains the information concerning the seismological instrumented sites (e.g., geographical, geological, geophisical and geotechnical data, as well as the site response, etc.) managed by OGS. A summary table shows the main information of the sites that match the input criteria.

For each site one can:


Event Waveforms

OASIS has specific a web page for searching and downloading event waveforms. The user can: <<< THIS FUNCTION IS STILL UNDER DEVELOPMENT >>>

Continuous Waveforms

This page allows one to search and retreive any piece of seismological records within the stream of continuous waveform data. In order to do that, the user has to define a set of stations as well as a time window. The web interface assists the user in this actions, and offers a graphical tool for verifying the availability of the required data.

Waveform data are provided in sac and/or miniseed format togehter with the dataless files, which contains the whole information on instruments for processing data correctly.

Some limitations exist on the size of the data that can be downloaded. At present a maximum of xxx MB is allowed for each request.



All the data concerning sites and instrumentation, as well as those of the recorded waveforms, are organized and written according to the SEED seismological standard.