I am a Geologist with the U.S. Geological Survey at the Cascades Volcano Observatory in Vancouver, Washington. I specialize in volcano hazards assessment and risk research and applications for domestic as well as foreign volcanoes as a member of the Volcano Disaster Assistance Program (VDAP), co-funded by the U.S. Geological Survey and the U.S. Agency for International Development's Office of U.S. Foreign Disaster Assistance (USAID/OFDA). I am currently involved in several projects, including: compilation and analysis of a spatial database of Holocene volcanic vents in the western conterminous U.S., field mapping and characterization of Holocene rhyolitic tephras at Medicine Lake volcano in northern California, development of next generation volcano hazard and risk assessments, and co-leading the Bureau risk implementaton team.
Ramsey, D.W., Donnelly-Nolan, J.M., and Robinson, J.E., 2019, Hazard boundaries for the volcanic hazard assessment of Medicine Lake volcano, California: U.S. Geological Survey data release [Link].
Ewert, J.W., Diefenbach, A.K., and Ramsey, D.W., 2018, 2018 update to the U.S. Geological Survey national volcanic threat assessment: U.S. Geological Survey Scientific Investigations Report 2018–5140, 40 p., [Link].
Ludwig, K.A., Ramsey, D.W., Wood, N.J., Pennaz, A.B., Godt, J.W., Plant, N.G., Luco, N., Koenig, T.A., Hudnut, K.W., Davis, D.K., and Bright, P.R., 2018, Science for a risky world—A U.S. Geological Survey plan for risk research and applications: U.S. Geological Survey Circular 1444, 57 p., [Link].
Furze, A.J., Bard, J.A., Robinson, J.E., Ramsey, D.W., Kuntz, M.A., Rowley, P.D., MacLeod, N.S., 2017, Database for Geologic Maps of Pyroclastic-Flow and Related Deposits of the 1980 Eruptions of Mount St. Helens, Washington: U.S. Geological Survey Data Series 1054, [Link].
Bard, J.A., and Ramsey, D.W., 2016, High-resolution digital elevation dataset for Newberry Volcano and vicinity, Oregon, based on lidar survey of August-September, 2010 and bathymetric survey of June, 2001: U.S. Geological Survey data release, [Link].
Ramsey, D. W., 2009, Wizard Island in Gillespie, R. G., and Clague, D. A., eds., Encyclopedia of Islands: Berkeley, California, University of California Press, p. 979-981.
Ramsey, D. W., Schilling, S. P., Messerich, J. A., and Thompson, R. A., 2007, Rebuilding Mount St. Helens: Earth Imaging Journal, v. 4, no. 3, p. 26-27.
Ramsey, D. W., Robinson, J. E., Schilling, S. P., Schaefer, J. R., and Trusdell, F. A., 2007, Crisis GIS: Preparing for and Responding to Volcanic Eruptions in the United States, in Thomas, C., ed., Standards for Success: GIS for Federal Progress and Accountability: Redlands, California, ESRI Press, p. 3-8.
Ramsey, D. W., Dartnell, P., Bacon, C. R., Robinson, J. E., and Gardner, J. V., 2004, Crater Lake Revealed: Geospatial Solutions, v. 14, no. 12, p. 58.
Ramsey, D. W., Robinson, J. E., Dartnell, P., Bacon, C. R., Gardner, J. V., Mayer, L. A., Buktenica, M. W., and Nathenson, M., 2002, Crater Lake Revealed: Using GIS to Visualize and Analyze the Depths of Crater Lake, Oregon: ESRI Map Book, v. 17, p. 9.
Ramsey, D. W., Robinson, J. E., Christiansen, R. L., Smith, J. G., and Blakely, R. J., 2001, Digital Shasta: Applying GIS Technology to Volcano Hazards, in ArcUser, v. 4, no. 3, p. 66-67.
Ramsey, D. W., Robinson, J. E., Dartnell, P., Bacon, C. R., Gardner, J. V., Mayer, L. A., Buktenica, M. W., and Nathenson, M., 2001, Crater Lake Revealed: The Earth Geographic Monthly, v. 162, p. 14-15.
Howell, D. G., Brabb, E. E., and Ramsey, D. W., 2000, How useful is landslide information?: Lessons learned in the San Francisco Bay region, in Ernst, W. G., and Coleman, R. G., eds., Tectonic studies of Asia and the Pacific rim: A tribute to Benjamin M. Page (1911-1997): Columbia, Maryland, Bellwether Publishing Ltd. for the Geological Society of America, International Book Series, v. 3, p. 315-328.
Ramsey, D. W., Graham, S. E., and others, 1999, Landslide hazard susceptibility maps for the San Francisco Bay region: Tools for emergency planning during the 1997-98 El Niño: ESRI Map Book, v. 14, p. 18-19.
O'Hara, D., Karlstrom, L., and Ramsey, D. W., 2019, Volcanic topography covaries with subsurface magmatic structures through time in the Cascades Arc of the western U.S. [abs.]: Abstract 39-1, GSA Cordilleran Section Meeting, GSA.
Karlstrom, L., O'Hara, D. J., Lerner, A., and Ramsey, D. W., 2019, Patterns of crustal magma transport in arcs revealed by comparing geophysical observations with volcanic topography [abs.]: Abstract EGU2019-11048, General Assembly, EGU.
O'Hara, D. J., Karlstrom, L., and Ramsey, D. W., 2018, What can topography tell us about the regional-scale history of Cascades arc magmatism over the last 2 Myr? [abs.]: Abstract V31H-0228, Fall Meeting, AGU.
Mayberry, G. C., Ramsey, D. W., Lowenstern, J. B., and Pallister, J. S., 2018, The Volcano Disaster Assistance Program’s Journey to Developing a Systematic Plan to Monitor Program Progress- Learn from our Mistakes and Successes [abs.]: Abstract S02.11-703, Cities on Volcanoes 10.
Mayberry, G. C., Ramsey, D. W., and Pallister, J. S., 2017, The Volcano Disaster Assistance Program’s Performance Monitoring and Evaluation System: Coordinating, Capturing, and Communicating Progress in Building the Capacity to Respond to Volcanic Crises [abs.]: Abstract VS43E-232, IAVCEI 2017 Scientific Assembly.
Ramsey, D. W., and Siebert, L., 2017, Spatial and Temporal Database Compilation of Holocene Volcanic Vents in the Western Conterminous United States [abs.]: Abstract FT13B-217, IAVCEI 2017 Scientific Assembly.
Ramsey, D. W., and Siebert, L., 2015, Spatial compilation of Holocene volcanic vents in the western conterminous United States [abs.]: Abstract V31B-3013, Fall Meeting, AGU.
Vallance, J. W., Van Eaton, A. R., and Ramsey, D. W., 2015, Late Pleistocene and Holocene geology and hazards at Glacier Peak Volcano, Washington [abs.]: Abstract V33B-3088, Fall Meeting, AGU.
Shea, T., Giachetti, T., Gonnerman, H. M., Donnelly-Nolan, J. M., and Ramsey, D. W., 2014, From pumice to obsidian: Eruptive behaviors that produce tephra-flow dyads. I - The AD1100 Big Glass Mountain eruption at Medicine Lake Volcano (California) [abs.]: Abstract V14B-06, Fall Meeting, AGU.
Karlstrom, L., Loh, L.K., Ramsey, D. W., and Wright, H. M. N., 2013, Integrating temporal and spatial patterns of Quaternary Cascades eruptions with geochemistry, tomography and heat flow [abs.]: IAVCEI Scientific Assembly, Abstract 1P2_3B_O23.
Loh, L.K., Karlstrom, L., Ramsey, D. W., and Wright, H. M. N., 2013, Structure of the volcanic vent distribution of the Cascade arc from a new database of Holocene and Pleistocene volcanism, with a focus on pre-caldera monogenetic volcanism at Mount Mazama, Oregon [abs.]: Abstract V13E-2654, Fall Meeting, AGU.
Ramsey, D. W., 2013, Spatial databases for CalVO volcanoes: Current status and future directions [abs.]: Abstract V13G-2691, Fall Meeting, AGU.
Ramsey, D. W., and Driedger, C. L., 2013, Spatial Database of Holocene and Latest Pleistocene Volcanic Vents in the Western Conterminous U.S. [abs.] in Lowenstern, J. B., ed., Abstracts for the October 2012 Meeting on Volcanism in the American Southwest, Flagstaff, Arizona: U.S. Geological Survey Open-File Report 2013-1026.
Donnelly-Nolan, J. M., Jensen, R. A., Ramsey, D. W., and Robinson, J. E., 2012, Technology and geologic mapping at Newberry Volcano, Oregon [abs.]: Abstract V33B-2855 presented at Fall Meeting, AGU, San Francisco, CA, 3-7 December.
Loh, L. K., Karlstrom, L., Ramsey, D. W., and Driedger, C. L., 2012, A new multiparameter database of Holocene and Pleistocene Cascades magmatism [abs.]: Abstract V53B-2821 presented at Fall Meeting, AGU, San Francisco, CA, 3-7 December.
Ramsey, D. W., and Miller, C. D., 2011, Latest isopach mapping of Holocene rhyolitic tephras at Medicine Lake volcano, northern California [abs.]: Abstract V13C-2612 presented at 2011 Fall Meeting, AGU, San Francisco, CA, 5-9 December.
Ramsey, D. W., Donnelly-Nolan, J. M., and Felger, T. J., 2010, Digital geologic map database of Medicine Lake volcano, northern California [abs.]: Abstract V11C-2290 presented at Fall Meeting, AGU, San Francisco, CA, 13-17 December.
Ramsey, D. W., and Donnelly-Nolan, J. M., 2009, Geologic map geodatabase of Newberry Volcano, Oregon [abs.]: Geological Society of America Abstracts with Programs, v. 41, no. 7, p. 310.
Ramsey, D. W., Miller, C. D., and Ewert, J. W. 2009, Preliminary volume estimates of primary Holocene rhyolitic tephras at Medicine Lake volcano, northern California [abs.]: Geological Society of America Abstracts with Programs, v. 41, no. 7, p. 63.
Miller, C. D., Ramsey, D. W., and Ewert, J. W., 2008, New isopach maps of Holocene rhyolitic tephras at Medicine Lake volcano, northern California [abs.]: Eos Transactions of the American Geophysical Union, v. 89, no. 53 (Supplement), Abstract V11B-2037.
Ramsey, D. W., Robinson, J. E., Schilling, S. P., Schaeffer, J. R., Trusdell, F. A., Griswold, J. P., and Graham, S. E., 2007, Crisis GIS: Preparing for and responding to volcanic eruptions in the United States [abs.]: Abstracts Volume, Cities on Volcanoes 5, Abstract 31-P-07, p. 156-157.
Schilling, S. P., Ramsey, D. W., Messerich, J. A., and Thompson, R. A., 2007, Rebuilding Mount St. Helens [abs.]: Geological Society of America Abstracts with Programs, v. 39, no. 2, p. 37.
Donnelly-Nolan, J. M., Champion, D. E., Ramsey, D. W., and Lanphere, M. A., 2005, The basalt of Yellowjacket Butte, another large and interesting lava flow at Medicine Lake volcano, N. California, USA [abs.]: Eos Transactions of the American Geophysical Union, v. 86, no. 52 (Supplement), Abstract V53B-1562.
Champion, D. E., Donnelly-Nolan, J. M., Lanphere, M. A., and Ramsey, D. W., 2004, Magnetic excursion recorded in basalt at Newberry Volcano, Central Oregon [abs.]: Eos Transactions of the American Geophysical Union, v. 85, no. 47 (Supplement), Abstract GP43B-0861.
Donnelly-Nolan, J. M, Champion, D. E., Lanphere, M. A., and Ramsey, D. W., 2004, New thoughts about Newberry Volcano, Central Oregon, USA [abs.]: Eos Transactions of the American Geophysical Union, v. 85, no. 47 (Supplement), Abstract V43E-1452.
Ramsey, D. W., Robinson, J. E., Schilling, S. P., Schaefer, J. R., Kimberly, P., Trusdell, F. A., Guffanti, M. C., Mayberry, G. C., Cameron, C. E., Smith, J. G., McIntire, J. A., Snedigar, S., and Ewert, J. W., 2004, Crisis GIS: Preparing for the next volcanic crisis in the United States [abs.]: Eos Transactions of the American Geophysical Union, v. 85, no. 47 (Supplement), Abstract V43E-1455.
Thornber, C., Rowe, M., Pallister, J., Gooding, D., Ramsey, D. W., Ewert, J., Couchman, M., Dzurisin, D., Hoblitt, R., Clynne, M., Lowenstern, J., Vallance, J., and Cashman, K., 2004, A collaborative approach to petrologic monitoring of the Mount St. Helens 2004 eruption [abs.]: Eos Transactions of the American Geophysical Union, v. 85, no. 47 (Supplement), Abstract V53D-04A.
Donnelly-Nolan, J. M., Lanphere, M. A., and Ramsey, D. W., 2003, Medicine Lake volcano: Results of geologic mapping and argon dating [abs.]: Geological Society of America Abstracts with Programs, v. 35, no. 6, p. 563.
Robinson, J. E., Ramsey, D. W., Clynne, M. A., Schilling, S. P., and Thompson, R. A., 2003, Remote sensing as a tool for geologic mapping at Mount St. Helens, Washington [abs.]: Geological Society of America Abstracts with Programs, v. 35, no. 6, p. 562.
Bacon, C. R., and Ramsey, D. W., 2002, Digital geologic map of Mount Mazama and Crater Lake caldera, Oregon [abs.]: Eos Transactions of the American Geophysical Union, v. 83, no. 47 (Supplement), p. F1462.
Lowenstern, J. B., Barth, G. A., Childs, J. R., Donnelly-Nolan, J. M., Ramsey, D. W., Robinson, J. E., Phillips, R. L., Starrat, S. W., and Barron, J. A., 2002, Bathymetric and seismic-reflection profiles hint at the origins of Medicine Lake, CA (USA) [abs.]: Eos Transactions of the American Geophysical Union, v. 83, no. 47 (Supplement), p. F1461.
Ramsey, D. W., Bacon, C. R., and Dutton, D. R., 2002, Geologic panoramas of the walls of Crater Lake caldera, Oregon [abs.]: Eos Transactions of the American Geophysical Union, v. 83, no. 47 (Supplement), p. F1462.
Ramsey, D. W., and Donnelly-Nolan, J. M., 2002, Digital geologic map database of Medicine Lake volcano, California [abs.]: Geological Society of America Abstracts with Programs, v. 34, no. 5, p. A-86.
Donnelly-Nolan, J. M., and Ramsey, D. W., 2001, Geologic mapping of Medicine Lake volcano, CA, USA [abs.]: Eos Transactions of the American Geophysical Union, v. 82, no. 47 (Supplement), p. F1318-F1319.
Ramsey, D. W., Robinson, J. E., Dartnell, P., Bacon, C. R., Gardner, J. V., Mayer, L. A., Buktenica, M. W., 2001, Crater Lake Revealed: Using GIS to Visualize and Analyze Postcaldera Volcanoes Beneath Crater Lake, Oregon [abs.]: Eos Transactions of the American Geophysical Union, v. 82, no. 47 (Supplement), p. F1377.
Blakely, R. J., Christiansen, R. L., Ramsey, D. W., Smith, J. G., and Donnelly- Nolan, J. M., 2000, A three-dimensional view of Mt. Shasta, California, based on inversion of gravity anomalies [abs.]: Geological Society of America Abstracts with Programs, v. 32, no. 7, p. A-430.
Gardner, J. V., Mayer, L. A., Buktenica, M. W., Bacon, C. R., Dartnell, P., Hellequin, L., Ramsey, D. W., and Robinson, J. E., 2000, High-resolution multibeam mapping of Crater Lake, Oregon [abs]: Eos Transactions of the American Geophysical Union, v. 81, no. 48 (Supplement), p. F1332.
Ramsey, D. W., Robinson, J. E., Christiansen, R. L., Smith, J. G., and Blakely, R. J., 2000, Digital Shasta: Applying GIS Technology to Volcano Hazards [abs.]: Eos Transactions of the American Geophysical Union, v. 81, no. 48 (Supplement), p. F1332.
Howell, D. G., Brabb, E. E., Pike, R. J., Ramsey, D. W., Roberts S., and Hillhouse, J. W., 1999, Landslide hazard information and the decision-making process [abs.]: Geological Society of America Abstracts with Programs, v. 31, no. 6, p. A-64.
Pike, R. J., and others (including Ramsey, D. W.), 1998, Slope failure and shoreline retreat around San Francisco Bay in the El Niño winter of 1997-98 [abs.]: Eos Transactions of the American Geophysical Union, v. 79, no. 45 (Supplement), p. F292.
Ramsey, D. W., and Godt, J. W., 1998, Damaging landslides in the San Francisco Bay region 1997-98: Building the better El Niño damage database [abs.]: Eos Transactions of the American Geophysical Union, v. 79, no. 45 (Supplement), p. F293.
The San Francisco Bay Landslide Team (28 authors including Ramsey, D. W.), 1998, Landslide Hazard Susceptibility maps for the San Francisco Bay region: Tools for Emergency Planning During the 1997-98 El Niño [abs.]: Eos Transactions of the American Geophysical Union, v. 79, no. 45 (Supplement), p. F292.
Ramsey, D. W., and Onasch, C. M., 1997, Fluid history of two cratonic fault zones in the eastern midcontinent [abs.]: Geological Society of America Abstracts with Programs, v. 29, no. 7, p. A-416.
Furze, Andrew J.; Bard, Joseph A.; Robinson, Joel; Ramsey, David W.; Kuntz, Mel A.; Rowley, Peter D.; MacLeod, Norman S.
Furze, A.J., Bard, J.A., Robinson, J.E., Ramsey, D.W., Kuntz, M.A., Rowley, P.D., MacLoed, N.S., 2017, Database for Geologic Maps of Pyroclastic-Flow and Related Deposits of the 1980 Eruptions of Mount St. Helens, Washington: U.S. Geological Survey Data Series 1054, https://doi.org/10.3133/ds1054.
Bard, Joseph A.; Ramsey, David W.
Bard, J.A., Ramsey, D.W., 2016, High-resolution digital elevation dataset for Newberry Volcano and vicinity, Oregon, based on lidar survey of August-September, 2010 and bathymetric survey of June, 2001: U.S. Geological Survey data release, doi:10.5066/F7J38QNV.
Bard, Joseph A.; Ramsey, David W.; Wolfe, Edward W.; Ulrich, George E.; Newhall, Christopher G.; Moore, Richard B.; Bailey, Norman G.; Holm, Richard F.
Barron, Andrew D.; Ramsey, David W.; Smith, James G.
Barron, A.D., Ramsey, D.W., and Smith, J.G., 2014, Database for the geologic map of upper Eocene to Holocene volcanic and related rocks in the Cascade Range, Washington: U.S. Geological Survey Data Series 842, http://dx.doi.org/10.3133/ds842.
Bard, Joseph A.; Ramsey, David W.; MacLeod, Norman S.; Sherrod, David R.; Chitwood, Lawrence A.; Jensen, Robert A.
Database for the Geologic Map of Newberry Volcano, Deschutes, Klamath, and Lake Counties, Oregon; 2013; DS; 771; Bard, Joseph A.; Ramsey, David W.; MacLeod, Norman S.; Sherrod, David R.; Chitwood, Lawrence A.; Jensen, Robert A.
McIntire, Jacqueline; Ramsey, David W.; Thoms, Evan; Waitt, Richard B.; Beget, James E.
Database for volcanic processes and geology of Augustine Volcano, Alaska; 2012; DS; 677; McIntire, Jacqueline ; Ramsey, David W.; Thoms, Evan ; Waitt, Richard B.; Beget, James E.
Donnelly-Nolan, Julie M.; Stovall, Wendy K.; Ramsey, David W.; Ewert, John W.; Jensen, Robert A.
Newberry Volcano—Central Oregon's Sleeping Giant; 2011; FS; 2011-3145; Donnelly-Nolan, Julie M. ; Stovall, Wendy K. ; Ramsey, David W. ; Ewert, John W. ; Jensen, Robert A.