NCEDC News/Blog

Entire NCEDC Dataset Now Available Through AWS

February 9, 2024

In 2023, the NCEDC archive became part of the AWS (Amazon Web Services) Open Data Sponsorship Program and all of its data are now mirrored in the cloud (s3://ncedc‐pds; us‐east‐2 region). Tutorials and scripts are available to facilitate user access to this public data set. This allows the NCEDC to leverage Amazon’s cloud infrastructure and provide users the ability to provision gigabit connections to the archive as well as take advantage of the numerous computational resources offered by AWS.

NCEDC data holdings currently consist of more than 184 TB of data encompassing 29 networks and 2,640 stations. Time series data come from broadband, short period, strong motion seismic sensors, and other geophysical instruments. Earthquake catalogs include origin time, hypocenter, magnitude, moment tensor, focal mechanisms, phase arrivals, codas, and amplitude data. Metadata and instrument response for seismic sites are accessible in various formats for all data channels archived at the NCEDC.

The tutorial linked below describes some quick examples on how to start using the NCEDC dataset. An AWS account is not required to access the dataset.

The page below describes how the NCEDC waveform data, catalog data, and metadata are organized within the AWS Public Dataset:

Current issue with ObsPy FDSN web service client

November 1, 2022

11/22/2022 Note: This issue has been fixed in ObsPy v1.4.0.

In order to enhance security on our web services, we are now enforcing https connection. Even though most clients do support the redirect from http to https, there seems to be an issue with Obspy. We have contacted the developers and in the meantime, users can apply the following workaround before calling the Client() function:

from obspy.clients.fdsn.header import URL_MAPPINGS

FTP service to be retired on May 31, 2022

May 9, 2022

After May 31, 2022, the NCEDC will no longer be offering FTP services for researchers. We will continue to offer HTTPS as a way to download the same content. Researchers with automated scripts involving FTP will want to update their scripts to change any paths following the example below: is available as is available as

Note that URLs with ftp in their path (such as will also be deprecated on May 31, 2022.