Preserving the National Geothermal Data System's Geothermal Features and Observations Dataset (AASG-GDS)
This repository provides access to legacy data from the Association of American State Geologists (AASG) node of the National Geothermal Data System (NGDS), which originally served as part of a nationwide, distributed network aggregating geoscientific information from state geological surveys and academic geothermal centers. The linked materials include republished versions of the NGDS structured tables describing wells, sampling features, and associated observations such as heat flow and aqueous chemistry, as well as a web-based map displaying the corresponding geodatabase. Together, these links reflect efforts to stabilize access to NGDS geothermal data.
Citation Formats
TY - DATA
AB - This repository provides access to legacy data from the Association of American State Geologists (AASG) node of the National Geothermal Data System (NGDS), which originally served as part of a nationwide, distributed network aggregating geoscientific information from state geological surveys and academic geothermal centers. The linked materials include republished versions of the NGDS structured tables describing wells, sampling features, and associated observations such as heat flow and aqueous chemistry, as well as a web-based map displaying the corresponding geodatabase. Together, these links reflect efforts to stabilize access to NGDS geothermal data.
AU - Zaffos, Andrew
A2 - Richard, Steven
DB - Geothermal Data Repository
DP - Open EI | National Laboratory of the Rockies
DO -
KW - geothermal
KW - energy
KW - NGDS
KW - AZGS
KW - NGDS-AZGS
KW - well headers
KW - volcanic events
KW - thermal springs
KW - power plant facilities
KW - rock samples
KW - heat pump facilities
KW - geothermal areas
KW - direct use sites
KW - abandoned mines
KW - active faults
KW - National Geothermal Data System
KW - Association of American State Geologists
KW - AASG
KW - borehole lithology
KW - drill stem tests
KW - heat flow
KW - hydraulic properties
KW - geothermometry
KW - power plant production
KW - thermal conductivity
KW - well fluid production
KW - well logs
KW - well tests
KW - radiogenic heat
KW - rock chemistry
KW - aqueous chemistry
LA - English
DA - 2025/12/08
PY - 2025
PB - The University of Arizona
T1 - Preserving the National Geothermal Data System's Geothermal Features and Observations Dataset (AASG-GDS)
UR - https://gdr.openei.org/submissions/1805
ER -
Zaffos, Andrew, and Steven Richard. Preserving the National Geothermal Data System's Geothermal Features and Observations Dataset (AASG-GDS). The University of Arizona, 8 December, 2025, Geothermal Data Repository. https://gdr.openei.org/submissions/1805.
Zaffos, A., & Richard, S. (2025). Preserving the National Geothermal Data System's Geothermal Features and Observations Dataset (AASG-GDS). [Data set]. Geothermal Data Repository. The University of Arizona. https://gdr.openei.org/submissions/1805
Zaffos, Andrew and Steven Richard. Preserving the National Geothermal Data System's Geothermal Features and Observations Dataset (AASG-GDS). The University of Arizona, December, 8, 2025. Distributed by Geothermal Data Repository. https://gdr.openei.org/submissions/1805
@misc{GDR_Dataset_1805,
title = {Preserving the National Geothermal Data System's Geothermal Features and Observations Dataset (AASG-GDS)},
author = {Zaffos, Andrew and Richard, Steven},
abstractNote = {This repository provides access to legacy data from the Association of American State Geologists (AASG) node of the National Geothermal Data System (NGDS), which originally served as part of a nationwide, distributed network aggregating geoscientific information from state geological surveys and academic geothermal centers. The linked materials include republished versions of the NGDS structured tables describing wells, sampling features, and associated observations such as heat flow and aqueous chemistry, as well as a web-based map displaying the corresponding geodatabase. Together, these links reflect efforts to stabilize access to NGDS geothermal data.},
url = {https://gdr.openei.org/submissions/1805},
year = {2025},
howpublished = {Geothermal Data Repository, The University of Arizona, https://gdr.openei.org/submissions/1805},
note = {Accessed: 2026-09-09}
}
Details
Data from Dec 8, 2025
Last updated Jul 7, 2026
Submitted Jul 6, 2026
Organization
The University of Arizona
Contact
Andrew Zaffos
Authors
Keywords
geothermal, energy, NGDS, AZGS, NGDS-AZGS, well headers, volcanic events, thermal springs, power plant facilities, rock samples, heat pump facilities, geothermal areas, direct use sites, abandoned mines, active faults, National Geothermal Data System, Association of American State Geologists, AASG, borehole lithology, drill stem tests, heat flow, hydraulic properties, geothermometry, power plant production, thermal conductivity, well fluid production, well logs, well tests, radiogenic heat, rock chemistry, aqueous chemistryDOE Project Details
Project Name American Recovery and Reinvestment Award: Geothermal Data Aggregation
Project Lead Arlene Anderson
Project Number EE0002852
