Poedjono, B., Beck, N., Buchanan, A., Brink, J., Longo, J., Finn, C. A. & Worthington, E. W., 2011. Geomagnetic Referencing in the Arctic environment, SPE-149629-PP, SPE Arctic and Extreme Environments Conference & Exhibition, Moscow, Russia, 18-20 Oct. 2011, doi:10.2118/149629-MS.
Carol A Finn (Former Employee)
Science and Products
Year Published: 2018
Honolulu Magnetic Observatory
Tucked in a grove of thorny mesquite trees, on an ancient coral reef on the south side of the Hawaiian island of Oahu, west of Pearl Harbor, a small unmanned observatory quietly records the Earth’s time-varying magnetic field. The Honolulu Magnetic Observatory is 1 of 14 that the U.S. Geological Survey Geomagnetism Program operates at various...
Love, Jeffrey J.; Finn, CarolAttribution: Geologic Hazards Science Center, Natural Hazards, Geomagnetism Program, Region 7: Upper Colorado Basin
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Love, J.J., and Finn, C.A., 2018, Honolulu Magnetic Observatory: U.S. Geological Survey Fact Sheet 2018–3029, 2 p.
Year Published: 2018
On the feasibility of real-time mapping of the geoelectric field across North America
A review is given of the present feasibility for accurately mapping geoelectric fields across North America in near-realtime by modeling geomagnetic monitoring and magnetotelluric survey data. Should this capability be successfully developed, it could inform utility companies of magnetic-storm interference on electric-power-grid systems. That real...
Love, Jeffrey J.; Rigler, E. Joshua; Kelbert, Anna; Finn, Carol A.; Bedrosian, Paul A.; Balch, Christopher C.Attribution: Geologic Hazards Science Center, Natural Hazards, Geomagnetism Program, Region 7: Upper Colorado Basin
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Love, J.J., Rigler, E.J., Kelbert, Anna, Finn, C.A., Bedrosian, P.A., and Balch, C.C., 2018, On the feasibility of real-time mapping of the geoelectric field across North America: U.S. Geological Survey Open-File Report 2018-1043, 16 p., https://doi.org/10.3133/ofr20181043.
Year Published: 2017
Real-time geomagnetic monitoring for space weather-related applications: Opportunities and challenges
An examination is made of opportunities and challenges for enhancing global, real-time geomagnetic monitoring that would be beneficial for a variety of operational projects. This enhancement in geomagnetic monitoring can be attained by expanding the geographic distribution of magnetometer stations, improving the quality of magnetometer data,...
Love, Jeffrey J.; Finn, Carol
Year Published: 2017
Magnetic monitoring in Saguaro National Park
On a sandy, arid plain, near the Rincon Mountain Visitor Center of Saguaro National Park, tucked in among brittlebush, creosote, and other hardy desert plants, is an unusual type of observatory—a small unmanned station that is used for monitoring the Earth’s variable magnetic field. Named for the nearby city of Tucson, Arizona, the observatory...
Love, Jeffrey J.; Finn, Carol; Gamez Valdez, Yesenia C.; Swann, DonAttribution: Geologic Hazards Science Center, Natural Hazards, Geomagnetism Program, Region 7: Upper Colorado Basin
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Love, J.J., Finn, C.A., Gamez Valdez, Y.C., Swann, Don, 2017, Magnetic monitoring in Saguaro National Park: U.S. Geological Survey Fact Sheet 2017–3035, 2 p., https://doi.org/10.3133/fs20173035.
Year Published: 2016
Geoelectric hazard maps for the continental United States
In support of a multiagency project for assessing induction hazards, we present maps of extreme-value geoelectric amplitudes over about half of the continental United States. These maps are constructed using a parameterization of induction: estimates of Earth surface impedance, obtained at discrete geographic sites from magnetotelluric survey data...
Love, Jeffrey J.; Pulkkinen, Antti; Bedrosian, Paul A.; Jonas, Seth ; Kelbert, Anna; Rigler, Erin (Josh); Finn, Carol; Balch, Christopher; Rutledge, Robert; Waggel, Richard; Sabata, Andrew; Kozyra, Janet; Black, Carrie
Year Published: 2016
The F'derik-Zouerate iron district: Mesoarchean and Paleoproterozoic iron formation of the Tiris Complex, Islamic Republic of Mauritania
High-grade hematitic iron ores (of HIF, containing 60-65 wt%Fe) have been mined in Mauritania since 1952 from Superior-type iron deposits of the F'derik-Zouerate district. Depletion of the high-grade ores in recent years has resulted in new exploration projects focused on lower-grade magnetite ores occurring in Algoma-type banded iron...
Bouabdellah, Mohammed; Slack, John F.; Taylor, Cliff D.; Finn, Carol A.; Anderson, Eric D.; Bradley, Dwight C.; Joud, Mohamed; Taleb Mohamed, Ahmed; Horton, John D.; Johnson, Craig A.
Year Published: 2016
Improved geomagnetic referencing in the Arctic environment
Geomagnetic referencing uses the Earth’s magnetic field to determine accurate wellbore positioning essential for success in today's complex drilling programs, either as an alternative or a complement to north-seeking gyroscopic referencing. However, fluctuations in the geomagnetic field, especially at high latitudes, make the application of...
Poedjono, B.; Beck, N.; Buchanan, A. C.; Borri, L.; Maus, S.; Finn, Carol; Worthington, E. William; White, TimAttribution: Geologic Hazards Science Center, Natural Hazards, Geomagnetism Program, Region 7: Upper Colorado Basin
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Poedjono, B., Beck, N., Buchanan, A.,Buchanan, A., Borri, L., Maus, S., Finn, C. A., Worthington, E. W. & White, T., 2013. Improved geomagnetic referencing in the Arctic environment, SPE-166850-MS, SPE Arctic and Extreme Environments Technical Conference and Exhibition, 15-17 October, Moscow, Russia, doi:10.2118/166850-MS.
Year Published: 2015
Regional tectonic setting for the Trinidad earthquake swarms (2000-2012) from gravity and magnetic data
Earthquakes in the Raton basin near Trinidad, Colorado, (Figure 1) are located (Rubenstein et. al., 2014) near a major gravity and magnetic boundary. These earthquakes also occur in an area of hydrocarbon production that includes several high-capacity produced water injection wells. This presentation gives a very basic outline of the relation...
Finn, Carol A.; Kass, Mason A.; Smith, Bruce D.Attribution: Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Region 7: Upper Colorado Basin
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Carol A. Finn, M. Andy Kass, and Bruce D. Smith (2015) REGIONAL TECTONIC SETTING FOR THE TRINIDAD EARTHQUAKE SWARMS (2000-2012) FROM GRAVITY AND MAGNETIC DATA. Symposium on the Application of Geophysics to Engineering and Environmental Problems 2015: pp. 336-342.
Year Published: 2015
The Boulder magnetic observatory
The Boulder magnetic observatory has, since 1963, been operated by the Geomagnetism Program of the U.S. Geological Survey in accordance with Bureau and national priorities. Data from the observatory are used for a wide variety of scientific purposes, both pure and applied. The observatory also supports developmental projects within the...
Love, Jeffrey J.; Finn, Carol A.; Pedrie, Kolby L.; Blum, Cletus C.Attribution: Geologic Hazards Science Center, Natural Hazards, Geomagnetism Program, Region 7: Upper Colorado Basin
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Love, J.J., Finn, C.A., Pedrie, K.L., and Blum, C.C., 2015, The Boulder magnetic observatory: U.S. Geological Survey
Open-File Report 2015–1125, 8 p., http://dx.doi.org/10.3133/ofr20151125.
Year Published: 2015
Mapping the 3-D extent of the Northern Lobe of the Bushveld layered mafic intrusion from geophysical data
Geophysical models image the 3D geometry of the mafic portion of the Bushveld Complex north of the Thabazimbi-Murchison Lineament (TML), critical for understanding the origin of the world's largest layered mafic intrusion and platinum group element deposits. The combination of the gravity and magnetic data with recent seismic, MT, borehole and...
Finn, Carol A.; Bedrosian, Paul A.; Cole, Janine; Khoza, Tshepo David; Webb, Susan J.Attribution: Geology, Minerals, Energy, and Geophysics Science Center, Geology, Geophysics, and Geochemistry Science Center, Region 7: Upper Colorado Basin
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Finn, Carol A., Paul Bedrosian, Janine Cole, Tshepo David Khoza and Susan J. Webb, 2015, Mapping the extent of the Northern Lobe of the Bushveld layered mafic intrusion from geophysical data: Precambrian Research, v. 268, p. 279-294.
Year Published: 2015
Algoma-, Superior-, and oolitic-type iron deposits of the Islamic Republic of Mauritania (phase V, deliverable 83): Chapter O in Second projet de renforcement institutionnel du secteur minier de la République Islamique de Mauritanie (PRISM-II)
High-grade hematitic iron ores (or HIF, containing 60–65 percent Fe) have been mined in Mauritania from Superior-type iron deposits since 1952. Depletion of the high grade ores in recent years has resulted in a number of new projects focused on lower grade magnetite ores in Algoma-type banded iron formation (or BIF, containing approximately...
Taylor, Cliff D.; Finn, Carol A.; Anderson, Eric D.; Joud, M. Y.; Taleb, M. A.; Horton, John D.Attribution: Geology, Geophysics, and Geochemistry Science Center, Mineral Resources Program, Region 7: Upper Colorado Basin
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Taylor, C.D., Finn, C.A., Anderson, E.D., Joud, M.Y., Taleb, M.A., and Horton, J.D., 2015, Algoma-, Superior-, and oolitic-type iron deposits of the Islamic Republic of Mauritania (phase V, deliverable 83), chap. O of Taylor, C.D., ed., Second projet de renforcement institutionnel du secteur minier de la République Islamique de Mauritanie (PRISM-II): U.S. Geological Survey Open-File Report 2013‒1280-O, 94 p., http://dx.doi.org/10.3133/ofr20131280o/. [In English and French.]
Year Published: 2015
Synthesis of geophysical data (phase V, deliverable 55): Chapter B in Second projet de renforcement institutionnel du secteur minier de la République Islamique de Mauritanie (PRISM-II)
Aeromagnetic and radiometric data were used to map shallow Precambrian basement lithology and structure and determine the depth to magnetic basement, which in most cases, corresponds to the depth to crystalline basement of interest for mineral exploration. These depths, along with those determined from gravity data, help identify basins with...
Finn, Carol A.; Anderson, Eric D.Attribution: Geology, Geophysics, and Geochemistry Science Center, Mineral Resources Program, Region 7: Upper Colorado Basin
View Citation
Finn, C.A., and Anderson, E.D., 2015, Synthesis of geophysical data (phase V, deliverable 55), chap. B of Taylor, C.D., ed., Second projet de renforcement institutionnel du secteur minier de la République Islamique de Mauritanie (PRISM-II): U.S. Geological Survey Open-File Report 2013‒1280-B, 68 p., http://dx.doi.org/10.3133/ofr20131280b/. [In English and French.]
Pre-USGS Publications
Finn, C.A., Kraft, G.D., Sibol, M.S., Jones, R.L., and Pulaski, M.E., 2001, Relocation of Wyoming Mine Production Blasts Using Calibration Explosions, Pure and Applied Geophysics, V 158, N 1, pp 105-116, https://doi.org/10.1007/PL00001150.