Virginia Tech, Ardhi University, KIGAM

This is a CHORDS Portal for the Ol Doinyo Lengai, Tanzania Volcano Observatory.

Cloud-Hosted Realtime
Data Services
for the Geosciences

CHORDS is supported by the National Science Foundation EarthCube initiative, which is a community-led cyberinfrastructure initiative for the geosciences.

You are looking at a CHORDS Portal. This is a web service that allows scientists to easily provide Internet access to real-time streaming data. Typically these data are measurements made by diverse instruments, which are deployed in support of a particular research effort.

Each research team can operate their own portal, which is created simply by running a copy of the CHORDS appliance on Amazon cloud services. This provides a web server and database. CHORDS can both ingest and deliver data via simple http: requests, just like any web browser. Configuration and management of your private CHORDS server is also done through a web interface. Any user on the Internet can attach to the data streams using tools of their choice, such as Matlab, Excel, Python, web browsers; i.e. anything that is able to issue an http: request.

CHORDS portals can also forward real-time data streams to higher level CHORDS services, which might provide functions such as OGC compliant formatting, mapping services, federation, and just about anything else you can think of.

The goals of CHORDS are:


CHORDS has been issued a Digital Object Identifier (DOI) from

We request that researchers cite CHORDS usage in any relevant publication or other context as follows:

Stamps, D. S., Saria, E., Ji, K. H., Jones, J. R., Ntambila, D., Daniels, M. D., &amp; Mencin, D. (2016). <i>Real-time data from the Tanzania Volcano Observatory at the Ol Doinyo Lengai volcano in Tanzania (TZVOLCANO).</i> UCAR/NCAR - EarthCube.

Portal Status

Release 1.1.0-rc1
Uptime Server:3 months, System:3 months
Code Branch:master, Revision:ed6ed8f
Docker Build time:2020-08-31 15:45:47 UTC
System 5.15.0-105-generic #115-Ubuntu SMP Mon Apr 15 09:52:04 UTC 2024 x86_64
Rails Version:, Mode:production

Sponsor Acknowledgements

CHORDS is being developed for the National Science Foundation’s EarthCube program under grants 1639750, 1639720, 1639640, 1639570 and 1639554.