What is EONET?

More and more NASA imagery is being made available via web services (WMS, WMTS, etc.) and a significant percentage produced and published in near real-time (NRT = within a few hours after the acquisition). This ability means that NASA imagery can be used more routinely to examine current natural events as they happen.

Using client applications, such as NASA ESDIS’ Worldview, users can browse the entire globe daily and look for natural events as they occur. Regularly spotted storms in the tropics, dust storms over deserts, forest fires in the summers. These events are constantly occurring, and NASA NRT imagery can represent them all using a variety of different data parameters. However, the user's experience is tailored, and therefore restricted, by the client application. What if there was an API that provided a curated list of natural events and provided a way to link those events to event-related NRT image layers? Enter EONET.

The Earth Observatory Natural Event Tracker (EONET) is a prototype web service with the goal of:

  1. Providing a curated source of continuously updated natural event metadata.
  2. Providing a service that links those natural events to thematically-related web service-enabled image sources (e.g., via WMS, WMTS, etc.).

Event Curation

The curation of events is a significant component of the EONET system, and while the technical details are, to an extent, straight forward, the definition of what exactly constitutes an event is fluid and daring us to be constrained. What are the contextual parameters of an event? If one curator defines a specific wildfire in Idaho as a discrete event and another defines the summer wildfire season in the Pacific Northwest as a single event, what does that mean for the end user? If an end user can filter by source/curator, does that provide them with ample context for the development of their application?

We are still thinking about these issues and how to best represent them within EONET, and we encourage you to get in touch with us if you have ideas or suggestions or use cases that you have developed. To view a list of the sources, we are currently tracking for events (both automated and manually) please check out the sources feed. How events in EONET are curated.

About Us

Development of EONET began in 2015 and has been supported by the following:


Andi Thomas (Science Systems and Applications, Inc.): project lead
Paul Przyborski (Science Systems and Applications, Inc.): chief architect, programmer/dba/designer
Teddie Gelabert (Science Systems and Applications, Inc.): curator
Vipool Rathod (ADNET): system administration

Special thanks go to Kevin Ward (ESD) for years serving as the chief architect and project lead, Katie Baynes (ESDS), Kevin Murphy (ESDS), and Ryan Boller (ESDIS) for their continued support of the development of EONET.


All EONET metadata and services are intended to be used for visualization and general information purposes only and should not be construed as “official” with regards to spatial or temporal extent. Spatial and temporal extents of natural events represented in EONET are based on multiple sources, and often these representations are approximations at best.