This data set includes gravity measurements for the Island of Hawai`i collected as the source data for "Deep magmatic structures of Hawaiian volcanoes, imaged by three-dimensional gravity models" (Kauahikaua, Hildenbrand, and Webring, 2000). Data for 3,611 observations are stored as a single table and disseminated in .CSV format. Each observation record includes values for field station ID, latitude and longitude (in both Old Hawaiian and WGS84 projections), elevation, and Observed Gravity value. See associated publication for reduction and interpretation of these data.

In 2009, to increase the Hawaiian Volcano Observatory’s (HVO) microgravity monitoring capabilities, HVO acquired two Scintrex CG-5 Autograv gravity meters (serial numbers 90940579 and 90940578). Since 2009, these two relative gravimeters have been used to conduct campaign microgravity surveys at a network of 33 to 55 benchmarks across the summit region of Kīlauea Volcano, Hawai‘i (USA); the Kīlauea Campaign Gravity Network (KCGN). This data release comprises raw (as recorded by the gravimeters) and processed gravity data from campaign microgravity surveys of the KCGN between 2009-2017 using HVO’s Scintrex CG-5 relative gravimeters.

In 2009, to increase the Hawaiian Volcano Observatory’s (HVO) microgravity monitoring capabilities, HVO acquired two Scintrex CG-5 Autograv gravity meters (serial numbers 90940579 and 90940578). Since 2009, these two relative gravimeters have been used to conduct campaign microgravity surveys at a network of 33 to 55 benchmarks across the summit region of Kīlauea Volcano, Hawai‘i (USA); the Kīlauea Campaign Gravity Network (KCGN). This data release comprises raw (as recorded by the gravimeters) and processed gravity data from campaign microgravity surveys of the KCGN between 2009-2017 using HVO’s Scintrex CG-5 relative gravimeters.

Gravity model for the state of Hawaii. Data is from the following source: Flinders, A.F., Ito, G., Garcia, M.O., Sinton, J.M., Kauahikaua, J.P., and Taylor, B., 2013, Intrusive dike complexes, cumulate cores, and the extrusive growth of Hawaiian volcanoes: Geophysical Research Letters, v. 40, p. 3367-3373, doi:10.1002/grl.50633.

Gravity model for the state of Hawaii. Data is from the following source: Flinders, A.F., Ito, G., Garcia, M.O., Sinton, J.M., Kauahikaua, J.P., and Taylor, B., 2013, Intrusive dike complexes, cumulate cores, and the extrusive growth of Hawaiian volcanoes: Geophysical Research Letters, v. 40, p. 3367-3373, doi:10.1002/grl.50633.

This Data Release contains continuous gravity records from two instruments on Kīlauea Volcano, Hawaiʻi: the HOVL gravimeter, located on the east rim of Halemaʻumaʻu Crater directly above the 2008-2018 summit eruptive vent, and the PUOC gravimeter, located on northern rim of Puʻu ʻŌʻō crater on Kīlauea’s East Rift Zone. Both instruments were collocated with GNSS stations. The HOVL gravimeter was installed in 2010 and operated until 2018, when it was destroyed by summit collapse. The PUOC gravimeter was installed in 2013 and operated until 2018, when it was removed following the cessation of eruptive activity at Puʻu ʻŌʻō. Although both gravimeters have data gaps of varying lengths owing to equipment outages, the data provided new insights into Kīlauea’s magmatic system that might not otherwise be known, including the density of lava within the summit and Puʻu ʻŌʻō lava lakes and the occurrence of magmatic intrusions.

This 2' gravity density grid for the Principal Hawaiian Islands displays the distribution of about 61,000 terrestrial and marine gravity data held in the National Geodetic Survey gravity data base in July 1996. These data were augmented by gravity data contributions from NGA (former National Imagery and Mapping Agency (former Defence Mapping Agency)) and by satellite altimeter-derived marine gravity anomalies computed by Sandwell and Smith (1996). The values show the number of gravity data contained in a given 2' cell. Additional information is available at http://www.ngs.noaa.gov/GEOID/geoid.html We are particularly grateful to NGA (former National Imagery and Mapping Agency) for their assistance and their data contributions.

Data collected by 11 borehole tiltmeters operated by the U.S. Geological Survey on Kīlauea Volcano, on the Island of Hawai'i. Data was collected between 30 April, 2018 and 5 August, 2018. Among the features captured by this data set are: the collapse of Puʻuʻōʻō on 30 April, 2018, the migration of magma down the East Rift Zone from 30 April to 3 May, 2018, the M6.9 earthquake on 4 May, 2018, and the deflation and collapse of the shallow magma chamber at Kīlauea from early May until 5 August, 2018.

This U.S. Geological Survey (USGS) data release record consists of topographic data themes that cover the Hawaiian Geospatial Fabric (HIGF) domain. The 30-meter (m) raster data sets included under Topographic Derivatives are: digital elevation (dem.tif) , topographic wetness index (TWI, twi.tif), slope (rise over run, slope.tif), aspect (asp.tif), flow accumulation (fac.tif), and flow direction (fdr.tif). All file formats are in GeoTIFF (Geographic Tagged Imaged Format).

This U.S. Geological Survey (USGS) data release record consists of topographic data themes that cover the Hawaiian Geospatial Fabric (HIGF) domain. The 30-meter (m) raster data sets included under Topographic Derivatives are: digital elevation (dem.tif) , topographic wetness index (TWI, twi.tif), slope (rise over run, slope.tif), aspect (asp.tif), flow accumulation (fac.tif), and flow direction (fdr.tif). All file formats are in GeoTIFF (Geographic Tagged Imaged Format).