Alaska Volcano Observatory

Ken Dean

Department:	Geophysical Institute
Institute:	UAF/GI
Address:	Fairbanks, AK 99775-7320
Discipline(s):	Remote Sensing

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Kenneson G. Dean is the lead scientist who uses satellite data and modeling to detect, monitor and assess potential airborne and surface hazards of volcanic eruptions. NOAA Advanced Very High Resolution Radiometer (AVHRR) images and Synthetic Aperture Radar (SAR) images are the primary data used. The AVHRR data are received in real-time from an HRPT ground station at the Geophysical Institute. SAR data is acquired from the Alaska SAR Facility (ASF) also at the Geophysical Institute. The movement of eruption clouds are predicted using the Puff tracking model. Model predictions are compared to satellite images for validation. The North Pacific Region, which includes volcanoes in Alaska and Kamchatka Peninsula, Russia, are the primary study sties. Analyzed images are shared with various components of AVO through a file server and ftp in near real-time. Research objectives include tracking, modeling, spectral properties, dynamics, and composition of eruption clouds, and surface landform analyses to support volcano hazard assessments.

[Show Publications]

A multidisciplinary effort to assign realistic source parameters to models of volcanic ash-cloud transport and dispersion during eruptions 4550

Mastin, L.G., Guffanti, M., Servranckx, R., Webley, P., Barsotti, S., Dean, K., Durant, A., Ewert, J.W., Neri, A., Rose, W.I., Schneider, D., Siebert, L., Stunder, B., Swanson, G., Tupper, A., Volentik, A., and Waythomas, C.F., 2009, A multidisciplinary effort to assign realistic source parameters to models of volcanic ash-cloud transport and dispersion during eruptions: Journal of Volcanology and Geothermal Research, v. 186, n. 1-2, p. 10-21, doi:10.1016/j.jvolgeores.2009.01.008 .

Preliminary sensitivity study of eruption source parameters for operational volcanic ash cloud transport and dispersion models - A case study of the August 1992 eruption of the Crater Peak vent, Mount Spurr, Alaska 4551

Webley, P.W., Stunder, B.J.B., and Dean, K.G., 2009, Preliminary sensitivity study of eruption source parameters for operational volcanic ash cloud transport and dispersion models - A case study of the August 1992 eruption of the Crater Peak vent, Mount Spurr, Alaska: Journal of Volcanology and Geothermal Research, v. 186, n. 1-2, p. 108-119, doi:10.1016/j.jvolgeores.2009.02.012 .

Near-real-time volcanic ash cloud detection: Experiences from the Alaska Volcano Observatory 4552

Webley, P.W., Dehn, J., Lovick, J., Dean, K.G., Bailey, J.E., and Valcic, L., 2009, Near-real-time volcanic ash cloud detection: Experiences from the Alaska Volcano Observatory: Journal of Volcanology and Geothermal Research, v. 186, n. 1-2, p. 79-90, doi:10.1016/j.jvolgeores.2009.02.010 .

Automated forecasting of volcanic ash dispersion utilizing Virtual Globes 4560

Webley,P.W., Dean, Kenneson, Bailey, J.E., Dehn, Jon, and Peterson, Rorik, 2009, Automated forecasting of volcanic ash dispersion utilizing Virtual Globes: Natural Hazards, v. 51, p. 345-361, doi: 10.1007/s11069-008-9246-2 .

Forecasting exposure to volcanic ash based on ash dispersion modeling 4451

A technique has been developed that uses Puff, a volcanic ash transport and dispersion (VATD) model, to forecast the relative exposure of aircraft and ground facilities to ash from a volcanic eruption. VATD models couple numerical weather prediction (NWP) data with physical descriptions of the initial eruptive plume, atmospheric dispersion, and settling of ash particles.

Peterson, R.A., and Dean, K.G., 2008, Forecasting exposure to volcanic ash based on ash dispersion modeling: Journal of Volcanology and Geothermal Research, v. 170, p. 230-246, doi:10.1016/j.jvolgeores.2007.10.003.

Predicting and validating the motion of an ash cloud during the 2006 eruption of Mount Augustine volcano, Alaska, USA 4436

Collins, R.L., Fochesatto, J., Sassen, K., Webley, P.W., Atkinson, D.E., Dean, K., Cahill, C.F., and Mizutani, K., 2007, Predicting and validating the motion of an ash cloud during the 2006 eruption of Mount Augustine volcano, Alaska, USA: Journal of the National Institute of Information and Communications Technology, v. 54, n. 1-2, p. 17-28.

Satellite measurement of glaciers on volcanoes in Alaska: building an inventory of ice extent and hazards 4431

Wessels, Rick, Neal, C.A., Waythomas, Christopher, Huggel, Christian, and Dean, Ken, 2007, Satellite measurement of glaciers on volcanoes in Alaska: building an inventory of ice extent and hazards [abs.]: Geological Society of America - Abstracts with Programs, v. 39, n. 4, p. 20.

Volcanic ash modeling for North Pacific volcanoes automated operational monitoring and virtual globes 4277

There are over 100 active volcanoes in the North Pacific (NOPAC) region, most of which are located in uninhabited areas. The Alaska Volcano Observatory (AVO) operationally monitors these volcanoes and is a joint program of the United States Geological Survey, the Geophysical Institute of the University of Alaska Fairbanks and the State of Alaska Division of Geological and Geophysical Surveys. Dispersion models play a pivotal role in forecasting the movement of volcanic ash clouds by complementing remote sensing data and visual observations from the ground and aircraft. Puff is a three dimensional dispersion model primarily designed for forecasting volcanic ash dispersion and is used by AVO and other agencies.

Webley, P.W., Dean, Kenneson, Bailey, J.E., and Peterson, Rorik, 2007, Volcanic ash modeling for North Pacific volcanoes automated operational monitoring and virtual globes: Fourth International Workshop on Volcanic Ash, World Meterological Organization (WMO) in close collaboration with the International Civil Aviation Organziation (ICAO) and the Civil Aviation Authority of New Zealand, Rotorua, New Zealand, 26-20 March, 2007, 8 p., available at http://www.caa.govt.nz/Volcanic_Ash_Workshop/Papers/VAWS4WP0605.pdf .
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Quantifying potential aircraft tephra exposure using a volcanic ash dispersion model 4395

Peterson, R.A., and Dean, K.G., 2006, Quantifying potential aircraft tephra exposure using a volcanic ash dispersion model [abs.]: Eos, Joint Assembly Supplement, v. 87.

The use of high resolution NWP data for dispersion modeling of airborne volcanic ash and tephra fallout 4401

Morton, Don, Webley, P.W., Dean, K.G., and Peterson, R., 2006, The use of high resolution NWP data for dispersion modeling of airborne volcanic ash and tephra fallout [abs.]: Eos, Joint Assembly Supplement, v. 87.

Size- and time-resolved composition of volcanic ash from Augustine Volcano, Alaska 4422

Cahill, C.F., Cahill, T.A., Webley, P., Wallace, K.L., Dean, K.G., and Dehn, J., 2006, Size- and time-resolved composition of volcanic ash from Augustine Volcano, Alaska [abs.]: Eos, Joint Assembly Supplement, v. 87, abstract V22B-05.

The role of remote sensing in monitoring of Augustine Volcano 4154

Webley, Peter, Dean, Ken, Dehn, Jon, Bailey, John, Schneider, Dave, Wessels, Rick, Lovick, Joseph, Rinkleff, Peter, and Izbekov, Pavel, 2006, The role of remote sensing in monitoring of Augustine Volcano [abs.]: Geological Society of America - Abstracts with Programs, v. 38, n. 5, p. 28.

The 2006 Augustine eruption in Synthetic Aperture Radar data 4155

Lovick, Joseph, Izbekov, Pavel, Dean, Ken, and Atwood, Don, 2006, The 2006 Augustine eruption in Synthetic Aperture Radar data [abs.]: Geological Society of America - Abstracts with Programs, v. 38, n. 5, p. 28.

Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: Comparison with Advanced Very High Resolution Radiometer thermal imagery 3818

"Throughout February and March 1997, Okmok Volcano, in the eastern Aleutian Islands of Alaska, erupted a 6-km-long lava flow of basaltic 0a0a within its caldera. In the first part of the study a numerical model for lava flow cooling was developed by Patrick et al. and applied to the flow to better understand the nature of its cooling. In this second part of the study, the model predictions for lava surface temperature over a 200-day cooling period were compared to advanced very high resolution radiometer (AVHRR) thermal imagery. Various methods were used to extract the subpixel lava temperature from the AVHRR pixel-integrated values, including the dual-band method and pixel merging. Inherent to these approaches is the multicomponent modeling of the lava surface temperature."

Patrick, M. R., Dehn, J., and Dean, K., 2005, Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: Comparison with Advanced Very High Resolution Radiometer thermal imagery: Journal of Geophysical Research, v. 110, n. B02210, 9 p., doi: 10.1029/2003JB002538

Predicting regions susceptible to high concentrations of airborne volcanic ash in the North Pacific region 4105

Airborne ash probability distribution (AAPD) maps have been generated to show the distribution of airborne volcanic ash in the North Pacific (NOPAC) region by simulating volcanic eruption clouds from 22 of the 100 most historically active volcanoes in the region. The PUFF ash-dispersion model was run daily using archived wind field data between 1994-1995 and 1997-2001 for low and high aircraft flight levels. Subsequent statistics are generated representing the distribution of simulated airborne ash at 6- and 24-h intervals, defining the regions most likely to contain airborne ash and the direction and distance a volcanic ash cloud may propagate from a given volcano. The AAPD maps show the extent of ash from a given volcano can encompass all of Alaska, most of the North Pacific Ocean, portions of northwestern North America, regions as far south as 358N, regions over the western Arctic Ocean, and portions of eastern Russia.

Papp, K.P., Dean, K.G., and Dehn, J., 2005, Predicting regions susceptible to high concentrations of airborne volcanic ash in the North Pacific region: Journal of Volcanology and Geothermal Research, v. 148, no. 3-4, p. 295-314, doi: 10.1016/j.jvolgeores.2005.04.020.

Active mud volcanism observed with Landsat 7 ETM+ 3681

Patrick, M. R., Dean, K., and Dehn, J., 2004, Active mud volcanism observed with Landsat 7 ETM+: Journal of Volcanology and Geothermal Research, v. 131, n. 3-4, p. 307-320.

Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: approach and analysis 3675

Patrick, M. R., Dehn, Jon, and Dean, Ken, 2004, Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: approach and analysis: Journal of Geophysical Research, v. 109, n. 3, p. 1-17.

The 1997 eruption of Okmok Volcano, Alaska: a synthesis of remotely sensed imagery 3407

Patrick, M. R., Dehn, J., Papp, K. R., Lu, Z., Dean, K., Moxey, L., Izbekov, P., and Guritz, R., 2003, The 1997 eruption of Okmok Volcano, Alaska: a synthesis of remotely sensed imagery: Journal of Volcanology and Geothermal Research, v. 127, n. 1-2, p. 87-105.

Operational satellite monitoring of volcanoes at the Alaska Volcano Observatory 3477

"Advanced Very High Resolution Radiometer (AVHRR), Geostationary Operational Environmental Satellite (GOES), and Geostationary Meteorological Satellite (GMS) are used routinely to detect and monitor elevated ground temperatures and eruption clouds at volcanoes in the North Pacific Region. Volcanoes in this region include those in Alaska, Kamchatka Peninsula and the northern Kuril Islands. These data provide observations multiple times per day of over 100 active volcanoes in this region."

Dean, K. G., Dehn, Jon, Engle, Kevin, Izbekov, Pavel, and Papp, Ken, 2002, Operational satellite monitoring of volcanoes at the Alaska Volcano Observatory: in Harris, A. J. H., Wooster, Martin, and Rothery, D. A., (eds.), Monitoring Volcanic Hotspots Using Thermal Remote Sensing, Advances in Environmental Monitoring and Modelling, v. 1, n. 3, p. 70-97.

Thermal precursors in satellite images of the 1999 eruption of Shishaldin Volcano 3478

Shishaldin Volcano, Unimak Island Alaska, began showing signs of thermal unrest in satellite images on 9 February 1999. A thermal anomaly and small steam plume were detected at the summit of the volcano in short-wave thermal infrared AVHRR (advanced very high resolution radiometer) satellite data. This was followed by over 2 months of changes in the observed thermal character of the volcano. Initially, the thermal anomaly was only visible when the satellite passed nearly directly over the volcano, suggesting a hot source deep in the central crater obscured from more oblique satellite passes.

Dehn, Jonathan, Dean, K. G., Engle, Kevin, and Izbekov, Pavel, 2002, Thermal precursors in satellite images of the 1999 eruption of Shishaldin Volcano: Bulletin of Volcanology, v. 64, n. 8, p. 525-534.

Analysis of surface processes using SAR data; Westdahl Volcano, Alaska 3629

Dean, K. G., Engle, K., Groves, J., Dehn, J., and Partington, K., 2002, Analysis of surface processes using SAR data; Westdahl Volcano, Alaska: International Journal of Remote Sensing, v. 23, n. 21, p. 4529-4550.

An analysis of volcanic ash cloud movement and dispersion in the North Pacific region 3635

Papp, K. R., Dean, K. G., and Dehn, J., 2002, An analysis of volcanic ash cloud movement and dispersion in the North Pacific region [abs.]: in Whitledge, Terry, (ed.), Connectivity in northern waters; Arctic Ocean, Bering Sea, and Gulf of Alaska interrelationships, Arctic Science Conference, 53, Program and Abstracts, Fairbanks, AK, Sept. 18-21, 2002, p. 180.

Satellite imagery proves essential for monitoring erupting Aleutian volcano 2937

"Mt. Cleveland is one of more than 40 active volcanoes in Alaska that is monitored by the Alaska Volcano Observatory (AVO). It is located on the western half of Chuginadak, a remote and uninhabited island in the east central Aleutians that lies 1526 km southwest of Anchorage. The closest inhabited community, Nikolski, is 75 km to the east on Umnak Island (Figure 1)."

Dean, Kenneson, Dehn, Jonathan, McNutt, Steve, Neal, Christina, Moore, Richard, and Schneider, Dave, 2002, Satellite imagery proves essential for monitoring erupting Aleutian volcano: Eos, v. 83, n. 22, p. 241, 246-247.

The combined use of satellite and seismic monitoring during the 1996 eruption of Pavlof volcano, Alaska 162

The 1996 eruption of Pavlof volcano provided a unique opportunity for the combined use of satellite and seismic monitoring techniques. Advanced Very High Resolution Radiometer (AVHRR) satellite data provided observations of both thermal anomalies and eruption plumes. A thermal anomaly appeared in AVHRR data 3 days prior to the eruption and continued to grow until shortly before the height of eruptive activity.

Roach, A. L., Benoit, J. P., Dean, K. G., and McNutt, S. R., 2001, The combined use of satellite and seismic monitoring during the 1996 eruption of Pavlof volcano, Alaska: Bulletin of Volcanology, v. 62, n. 6, p. 385-399.

Monitoring and analyses of volcanic activity using remote sensing data at the Alaska Volcano Observatory: case study for Kamchatka, Russia, December 1997 165

Schneider, D. J., Dean, K. G., Dehn, J., Miller, T. P., and Kirianov, V. Y., 2000, Monitoring and analyses of volcanic activity using remote sensing data at the Alaska Volcano Observatory: case study for Kamchatka, Russia, December 1997: in Mouginis-Mark, P. J., Crisp, J. A., and Fink, J. H., Remote sensing of active volcanism, American Geophysical Union Geophysical Monograph 0116, p. 65-86.

Thermal monitoring of North Pacific volcanoes from space 200

Dehn, Jonathan, Dean, Ken, and Engle, Kevin, 2000, Thermal monitoring of North Pacific volcanoes from space: Geology, v. 28, n. 8, p. 755-758.

Numerical model of lava flow cooling for the 1997 Okmok eruption: comparison with AVHRR thermal imagery 3715

Patrick, Matt, Dehn, Jonathan, Dean, Kenneson, and Engle, Kevin, 2000, Numerical model of lava flow cooling for the 1997 Okmok eruption: comparison with AVHRR thermal imagery [abs.]: Eos, v. 81, n. 48, p. 1312.

An airborne ash hazards map for Shishaldin Volcano, Alaska 3717

Papp, K. R., Dean, K. G., Dehn, Jonathan, and Engle, Kevin, 2000, An airborne ash hazards map for Shishaldin Volcano, Alaska [abs.]: Eos, v. 81, n. 48, p. 1311-1312.

The use of satellite data to monitor volcanoes in the North Pacific region 953

Dean, K., Dehn, J., Izbekov, P., Worley, S., Engle, K., and Schneider, D., 1999, The use of satellite data to monitor volcanoes in the North Pacific region: in Thematic Conference on Geologic Remote Sensing, 13, Proceedings, v. 2, Vancouver, BC, Canada, March 1-3, 1999, Ann Arbor, MI, Environmental Research Institute of Michigan, p. II.84-II.87.

Thermal satellite imagery of the 1999 eruption of Shishaldin Volcano 942

Dehn, J., Dean, K. G., Worley, S., Izbekov, P., Schneider, D., Theilen, M., and Engle, K., 1999, Thermal satellite imagery of the 1999 eruption of Shishaldin Volcano [abs.]: in Severin, Barb and Anderson, P. M., (eds.), Science in the north: 50 years of change, Arctic Science Conference, 50, Program and Abstracts, Denali National Park and Preserve, AK, Sept 19-22, 1999, p. 210-211.

Analysis of surface volcanic processes using SAR data: Westdahl Volcano, Alaska 943

Dean, Ken, Engle, Kevin, George, Shari, Partington, Kim, and Dehn, Jon, 1999, Analysis of surface volcanic processes using SAR data: Westdahl Volcano, Alaska [abs.]: in Severin, Barb and Anderson, P. M., (eds.), Science in the north: 50 years of change, Arctic Science Conference, 50, Program and Abstracts, Denali National Park and Preserve, AK, Sept 19-22, 1999, p. 209-210.

Synthetic aperture radar mosaic of volcanic landforms on the Kamchatka Peninsula, Russia 852

Izbekov, Pavel, Dean, Kenneson, and Dehn, Jonathan, 1999, Synthetic aperture radar mosaic of volcanic landforms on the Kamchatka Peninsula, Russia [abs.]: Eos, v. 80, n. 46, p. 1147.

Thermal satellite imagery of the 1999 eruption of Shishaldin Volcano 858

Dehn, Jonathan, Dean, Kenneson, Worley, Shelly, Izbekov, Pavel, Schneider, D. J., Theilen, Monica, and Engle, Kevin, 1999, Thermal satellite imagery of the 1999 eruption of Shishaldin Volcano [abs.]: Eos, v. 80, n. 46, p. 1146.

Satellite monitoring of remote volcanoes improves study efforts in Alaska 108

Dean, K., Servilla, M., Roach, A., Foster, B., and Engle, K., 1998, Satellite monitoring of remote volcanoes improves study efforts in Alaska: Eos, v. 79, n. 35, p. 413, 422-423.

Monitoring of Arctic volcanoes via remote sensing 969

Dehn, J., Dean, K. G., Schneider, D. S., Izbekov, P., and Worley, S., 1998, Monitoring of Arctic volcanoes via remote sensing [abs.]: in International Cooperation in Arctic Research: Detecting Global Change and its Impacts in the Western Arctic, Arctic Science Conference, 49, Program and Abstracts, Fairbanks, AK, Oct. 25-28, 1998, p. 166-167.

PUFF: A high-resolution volcanic ash tracking model 1013

Searcy, Craig, Dean, Ken, and Stringer, William, 1998, PUFF: A high-resolution volcanic ash tracking model: Journal of Volcanology and Geothermal Research, v. 80, n. 1-2, p. 1-16.

SAR and TIR analysis of the 1997 eruption of Okmok Volcano, Alaska 968

Izbekov, Pavel, Dean, K. G., and Dehn, Jon, 1998, SAR and TIR analysis of the 1997 eruption of Okmok Volcano, Alaska [abs.]: in Arctic Science Conference, 49, Program and Abstracts, Fairbanks, AK, Oct. 25-28, 1998, p. 175.

Deformation of New Trident volcano measured by ERS 1 SAR interferometry, Katmai National Park, Alaska 144

"Using Synthetic Aperture Radar (SAR) interferometry, we detect several centimeters of uplift that accumulated during two years (1993-1995) around the vent of the New Trident volcano in Alaska's Katmai National Park."

Lu, Z., Fatland, R., Wyss, M., Li, S., Eichelberger, J., Dean, K., and Freymueller, J. T., 1997, Deformation of New Trident volcano measured by ERS 1 SAR interferometry, Katmai National Park, Alaska: Geophysical Research Letters, v. 24, n. 6, p. 695-698.

Monitoring and analyses of volcanic activity using remote sensing data at the Alaska Volcano Observatory 826

Schneider, D. J., Dean, K. G., Engle, K., and Worley, S. L., 1997, Monitoring and analyses of volcanic activity using remote sensing data at the Alaska Volcano Observatory [abs.]: Eos, v. 78, n. 46, p. 777.

Estimating the height of volcanic eruption clouds: new refinements 2177

Dean, K., Servilla, M., Houchens, M., Engle, K., Wyatt, C., and Eichelberger, J., 1996, Estimating the height of volcanic eruption clouds: new refinements [abs.]: Eos, v. 77, n. 46, p. 771.

Use of SAR data to study active volcanoes in Alaska 103

Dean, K. G., Neal, C., Doukas, M., Engle, K., and Lu, Z., 1996, Use of SAR data to study active volcanoes in Alaska: Earth Observation Quarterly, v. 53, p. 21-23.

Use of SAR data to study active volcanoes in Alaska 110

Dean, K. G., Engle, K., Lu, Z., Eichelberger, J., Neal, C., and Doukas, M., 1996, Use of SAR data to study active volcanoes in Alaska: in Circumpolar symposium, 4, Proceedings, Lyngby, Denmark, Apr. 29-May 1, 1996, Remote sensing of the polar environments, v. 391, Noordwijk, European Space Agency, p.153-158.

Merging remotely sensed data with geophysical models 615

Searcy, C., Dean, K., and Stringer, W., 1995, Merging remotely sensed data with geophysical models: Polar Record, v. 31, n. 178, p. 297-304.

Monitoring volcanic eruptions using satellite imagery 2217

Dean, K. G., George, Shari, Wyatt, Chris, and Engle, Kevin, 1995, Monitoring volcanic eruptions using satellite imagery [abs.]: Abstracts with Programs - Geological Society of America, v. 27, n. 5, p. 13.

The 1992 eruptions of Crater Peak, Alaska: comparison of satellite observations, deposit character, and eruption cloud model 2244

Wyatt, W. C., Dean, K. G., and Searcy, Craig, 1995, The 1992 eruptions of Crater Peak, Alaska: comparison of satellite observations, deposit character, and eruption cloud model [abs.]: Abstracts with Programs - Geological Society of America, v. 27, n. 5, p. 85.

Volcanic ash: comparison of ground samples to satellite observations and tracking model predictions 2291

Wyatt, W. C., Dean, K. G., Searcy, Cheryl, Eichelberger, J., and McGimsey, R. G., 1994, Volcanic ash: comparison of ground samples to satellite observations and tracking model predictions [abs.]: Eos, v. 75, n. 44, p. 717.

Satellite analyses of movement and characteristics of the Redoubt Volcano plume, January 8, 1990 102

On January 8, 1990 Redoubt Volcano in Alaska erupted. A mushroom-shaped plume formed above the volcano that later drifted to the east, dropping ash on the underlying terrain. The plume was recorded on two satellite images. The images show the plume as being circular 20 minutes after the eruption, and widely dispersed 4 hours later. Digital analyses of the images reveal variations in the morphology and spectral response of the top of the plume.

Dean, Ken, Bowling, S. A., Shaw, Glenn, and Tanaka, Hiroshi, 1994, Satellite analyses of movement and characteristics of the Redoubt Volcano plume, January 8, 1990: in Miller, T. P. and Chouet, B. A., (eds.), The 1989-1990 eruptions of Redoubt Volcano, Alaska, Journal of Volcanology and Geothermal Research, v. 62, n. 1, p. 339-352.

An aircraft encounter with a Redoubt ash cloud (a satellite view) 104

"On 14 December 1989, Redoubt Volcano, located 177 km southwest of Anchorage, Alaska (fig. l), erupted and expelled a huge eruption cloud composed of ash and gas to altitudes greater than 10 km (Brantley, 1990). For the next 4 months, 24 additional eruptions resulted in the deposition of ash throughout southern Alaska (Scott and McGimsey, 1991). Clouds of ash and gas from Redoubt Volcano drifted hundreds of kilometers to locations beyond Fairbanks, Delta Junction, and Glennallen."

Dean, K. G., Whiting, L., and Jiao, H., 1994, An aircraft encounter with a Redoubt ash cloud (a satellite view): in Casadevall, T. J., (ed.), Volcanic ash and aviation safety: proceedings of the first international symposium on volcanic ash and aviation safety, U.S. Geological Survey Bulletin B 2047, p. 333-339.
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The 1993 eruption of Veniaminof Volcano, Alaska 297

Dean, K., 1993, The 1993 eruption of Veniaminof Volcano, Alaska [abs.]: Eos, v. 74, n. 43, p. 74.

The use of satellite data to validate a high resolution model of volcanic eruption clouds 2325

Searcy, C., Dean, K., and Stringer, William, 1993, The use of satellite data to validate a high resolution model of volcanic eruption clouds [abs.]: Eos, v. 74, n. 43, p. 74.

Satellite and slow-scan television observations of the rise and dispersion of ash-rich eruption clouds from Redoubt Volcano, Alaska 422

Kienle, Juergen, Woods, A. W., Estes, S. A., Ahlnaes, K., Dean, K., and Tanaka, H., 1991, Satellite and slow-scan television observations of the rise and dispersion of ash-rich eruption clouds from Redoubt Volcano, Alaska: in Woods, A. W., Wilson, C. L., Weller, Gunter, Tanaka, H., and Severin, B. A. B., (eds.), International Conference on the Role of Polar Regions in Global Change, Proceedings, v. 2, Fairbanks, AK, June 11-15, 1990, p. 748-750.

Analysis of satellite images of Redoubt Volcano plumes 1528

Dean, K. G., and Whiting, Larry, 1991, Analysis of satellite images of Redoubt Volcano plumes [abs.]: in Casadevall, T. J., (ed.), First international symposium on volcanic ash and aviation safety, U.S. Geological Survey Circular C 1065, p. 17.

The 1989-1990 eruption of Redoubt Volcano: satellite surveillance of volcanic ash plumes, application to aircraft safety 1583

Kienle, J., Dean, K. G., Garbeil, H., and Rose, W. I., 1990, The 1989-1990 eruption of Redoubt Volcano: satellite surveillance of volcanic ash plumes, application to aircraft safety: Eos, v. 71, n. 7, p. 266.

Near-real time acquisition and analysis of satellite imagery of Redoubt Volcano 1631

Dean, K. G., Guritz, R. M., and Garbeil, H., 1990, Near-real time acquisition and analysis of satellite imagery of Redoubt Volcano [abs.]: Eos, v. 71, n. 43, p. 1701.

Satellite surveillance of volcanic ash plumes of the ongoing eruptions of Redoubt Volcano, Alaska 1658

Kienle, J., Dean, K. G., and Garbeil, H., 1990, Satellite surveillance of volcanic ash plumes of the ongoing eruptions of Redoubt Volcano, Alaska [abs.]: Eos, v. 71, n. 17, p. 649.

Analysis of satellite images of Redoubt Volcano 2561

Dean, K. G., Haitao, Jiao, Guritz, R. M., and Garbeil, Harold, 1990, Analysis of satellite images of Redoubt Volcano [abs.]: in American Association for the Advancement of Science, Arctic Division, Circumpolar Perspectives, Arctic Science Conference, Proceedings, 1990, p. 44.

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