The Structure of Koolau Volcano from Seismic Refraction Studies

Volume: 19Start Page: 306End Page: 31

Hawaii Geothermal Project : quarterly progress report no. 3 (December 1, 1973 through February 28, 1974)

Discussion of early exploration research conducted under the Hawaii Geothermal Project.Support for project provided by National Science Foundation, State of Hawaii, County of Hawai

A Study of the Source Mechanism of the Alaska Earthquake and Tsunami of March 27, 1964: Part II. Analysis of Rayleigh Wave

The source mechanism of the Alaska earthquake of March 27, 1964 has been investigated by analyzing the Rayleigh wave recorded on the strain seismograph at Kipapa Station, Hawaii. The parameters that give the best fit to the observed data are: rupture length of 800 km, rupture velocity of 3 km/sec, and direction of rupture line of S30oW. The results of this analysis compare favorably with field data of elevation changes, with distribution of epicenters of aftershocks, and with the area of generation of the tsunami as obtained from sea-wave refraction diagrams

Seismic Refraction Studies of the Crustal Structure of the Hawaiian Archipelago

Volume: 19Start Page: 315End Page: 31

A Seismic Refraction Study of the Koolau Volcanic Plug

The seismic data from the GASHOUSE line suppOrt the gravity and magnetic data as indicating a plutonic body occurring beneath the center of the Koolau caldera in the vicinity of Kailua, Oahu. This plug has a velo city greater than 7 krn/sec and adjoins material with a velocity of about 4.6 km / sec at the top and to the southeast. The width of the plug is estimated to be about 6 km down to 3-4 km. Reflections from a horizon greater than 3 km deep may indicate an und erlying magma chamber. The top of the plug is about 1600 m deep. Drilling of this plug would have considerable scientific value both geologically and geophysically. An appropriate drilling site would be at the southwest corner of Kaelepulu Pond, which "lies close to the center of the plug as now defined geophysically. Seismic reflection work directly above the dome is also recommended to test the present estimate of the depth based on refraction results

Thermal process of the east rift of Kilauea from geophysical data

Includes memorandum dated 3/17/1975 from John Shupe titled "Response to ERDA's concerns on the HGP proposal," letter from Shupe to Kurger, and a letter by Abbott documenting the unanimous favorable decision of the Site Selection Committee on the proposed drilling site.This is a short note summarizing results of geophysical surveys over the East Rift of Kilauea. Details on data and methods of analysis are being compiled for a later more comprehensive report

Community Geothermal Technology Program : cloth dyeing by geothermal steam. An experiment in technology transfer from Japan to Hawaii, final report

Report Number: DOE/SF/15798--T7This was an experiment to test whether cloth dyeing using geothermal steam (already proven in Japan) would be feasible in Hawaii. Results: Using a fabricated steam vat, cotton, silk, and synthetic can be dyed; the resulting material received high grades for steadfastness and permanency under dye testing. Techniques that were successful in Matsukawa, were replicated in Puna. However, attempts to embed leaf patterns on cloth using natural leaves and to extract natural dyes from Hawaiian plants were unsuccessful; the color of natural dyes deteriorated in hours. But chemical dyes gave brilliant hues or shades, in contrast to those in Japan where the steam there gave subdued tones. It is concluded that geothermal dyeing can be a viable cottage industry in Puna, Hawaii.DOE Contract Number FG03-85SF15798. "This is a report of work performed for the Community Geothermal Technology Program, a small grant program administered jointly by the Hawai'i Natural Energy Institute and the State of Hawai'i Department of Business, Economic Development and Tourism. This project was one of five funded under the second phase of the program, which were awarded in 1988. Funds for this phase were provided by the U.S. Department of Energy, the County of Hawai'i, and donations from private business.

A coordinated exploration program for geothermal sources on the island of Hawaii

Water Resources Seminar Series No. 8Staff members of the Hawaii Institute of Geophysics carried out an exploration program for geothermal sources on the island of Hawaii by using all relevant geophysical and geochemical methods. Infrared scanning aerial surveys followed by reconnaissance-type electrical surveys and group noise surveys narrowed down the promising area to the east rift of Kilauea. The surveys carried out over the east rift included magnetic, gravity, and electrical surveys by various methods: microearthquake, surveillance, temperature profiling of wells, and chemical analysis of water samples. Aeromagnetic, regional gravity, and crustal seismic refraction data were available in published literature. A model of the thermal structure of the east rift was put together to account for the data. The dike complex, through which magma from the central vent of Kilauea travels literally occupies a zone-3-km wide extending from 1-km to 5-km depth. On the south side of the dike complex, there may be a self-sealing geothermal reservoir where groundwater heated by the dike complex is trapped. Not all of the dike complex is hot; hot sections seem to occur in patches

Engineering and economic analysis for the utilization of geothermal fluids in a cane sugar processing plant : final report

The purpose of this study was to determine the feasibility of geothermal resource utilization at the Puna Sugar Company cane sugar processing plant, located in Keaau, Hawaii. A proposed well site area was selected based on data from surface exploratory surveys. The liquid dominated well flow enters a binary thermal arrangement, which results in an acceptable quality steam for process use. Hydrogen sulfide in the well gases is incinerated, leaving sulfur dioxide in the waste gases. The sulfur dioxide in turn is recovered and used in the cane juice processing at the sugar factory. The clean geothermal steam from the binary system can be used directly for process requirements. It replaces steam generated by the firing of the waste fibrous product from cane sugar processing. The waste product, called bagasse, has a number of alternative uses, but an evaluation clearly indicated it should continue to be employed for steam generation. This steam, no longer required for process demands, can be directed to increased electric power generation. Revenues gained by the sale of this power to the utility, in addition to other savings developed through the utilization of geothermal energy, can offset the costs associated with hydrothermal utilization.U.S. Department of EnergyDOE Contract Number: ET-78-C-03-174