Current global heat flow data (24,774 observations at 20,201 sites) are maintained by the International Heat Flow Commission (IHFC) of the International Association of Seismology and Physics of the Earth's Interior (IASPEI). Previous compilations of the data were provided by Lee and Uyeda (1965), Simmons and Horai (1968), Jessop, Hobart, and Sclater (1975), and Pollack, Hurter, and Johnson, 1993.

The data in all but a few cases were extracted from the original publications. At this site they may be downloaded in spreadsheet format (Microsoft Excel) and ASCII format.

References:

Lee, W.H.K. and Uyeda, S., Review of heat flow data. In Terrestrial Heat Flow, W.H.K. Lee, Ed. Am. Geophys. U. Monograph 8, 87-190, 1965.

Simmons, G., and Horai, K., Heat Flow Data 2, J. Geophys. Res., 73, 6609-6629, 1968.

Jessop, A.M., M.a., Hobart, and J. Sclater, The World Heat Flow Data Collection – 1975, Geothermal Service of Canada , Geothermal Series Number 5, Ottawa , Canada , 1976.

Pollack, Hurter, and Johnson, Heat flow from the Earth's interior: Analysis of the global data set, Reviews of Geophysics, 31, 267-280,1993.