Research Scientist at the Geological Survey of Canada, Sidney, British Columbia, Canada.
Geodynamicist, specializing in measuring crustal deformation using precise geodetic techniques (gravity, leveling, GPS, strainmeters) and interpreting these observations in the context of earthquake hazard.
Over the past 28 years, his principal area of research has been the study of crustal deformation within active seismic areas on the west coast of Canada using geodetic techniques such as leveling, precise gravity, laser ranging trilateration, and GPS.
Beginning in 1992, under his direction, the Geological Survey of Canada established the Western Canada Deformation Array, the first continuous GPS network in Canada for the express purpose of monitoring crustal motions. It was data from this network that provided the key information which led to the discovery of "Episodic Tremor and Slip" in the Cascadia Subduction Zone.
Dr. Dragert has also led Canadian involvement in the US EarthScope program which has resulted in a cooperative effort for more intensive crustal deformation monitoring along the Cascadia Subduction Zone, including the first installation of borehole strainmeters in Canada.
2007 : The J. Tuzo Wilson Medalist
A Canadian Pilot Project for a GPS Augmented Tsunami Warning System; Dragert, H; Schmidt, M; Wang, K; Bock, Y. , .(ESS Cont.# 2005613, Submitted for publication)
Northern Cascadia episodic tremor and slip: A decade of tremor observations from 1997 to 2007; Kao, H; Shan, S -J; Dragert, H; Rogers, G. Journal of Geophysical Research vol. 114, B00A12, 2009; 20 pages(ESS cont.# 20080380)
Tremor activity monitoring in northern Cascadia; Kao, H; Thompson, P J; Shan, S -J; Rogers, G; Dragert, H; Spence, G. Eos, Transactions of the American Geophysical Union vol. 89, no. 42, 2008; pages 405-406(ESS Cont.# 20080016)
Characterizing an "uncharacteristic" ETS event in northern Cascadia; Wang, K; Dragert, H; Kao, H; Roeloffs, E. Geophysical Research Letters vol. 35, L15303, 2008; 5 pages(ESS Cont.# 20080079)
January 2008 Revere-Dellwood Fault earthquake sequence offshore British Columbia; Bird, A L; Rogers, G C; Cassidy, J F; Kao, H; Dragert, H; Bentkowski, W. Seismological Research Letters vol. 79, no. 2, 2008; pages 295(ESS Cont.# 20080028)
Crustal uplift and sea level rise in northern Cascadia from GPS, absolute gravity, and tide gauge data; Mazzotti, S; Lambert, A; Courtier, N; Nykolaishen, L; Dragert, H. Geophysical Research Letters vol. 34, L15306, 2007; pages 1-5(ESS Cont.# 20070149)
Crustal motion and deformation monitoring of the Canadian landmass; Henton, J A; Craymer, M R; Ferland, R; Dragert, H; Mazzotti, S; Forbes, D L. Geomatica vol. 60, no. 2, 2006; pages 173-191(ESS Cont.# 20060188)
Spatial-temporal patterns of seismic tremors in northern Cascadia; Kao, H; Shan, S-J; Dragert, H; Rogers, G; Cassidy, J F; Wang, K; James, T; Ramachandran, K. Journal of Geophysical Research vol. 111, no. B3, B03309, 2006; 17 pages(GSC Cont.# 2005506)
Investigating the relationship of episodic tremor and slip to seismic activity along the Cascadia Margin; Dragert, H; Kao, H; Rogers, G C; Cassidy, J F; in, American Geophysical Union Fall Meeting 2005: abstracts; . Eos, Transactions of the American Geophysical Union vol. 86, no. 52, 2005; 1 (G43A-03) pages(ESS Cont.# 2005511)
A wide depth distribution of seismic tremors along the northern Cascadia margin; Kao, H; Shan, S -J; Dragert, H; Rogers, G; Cassidy, J F; Ramachandran, K. Nature (London) vol. 436, no. 7052, 2005; pages 841-844(ESS Cont.# 2004447)
The 26 December 2004, M 9.0 Sumatra earthquake: implications for Cascadia; Cassidy, J F; Rogers, G C; Dragert, H; Wang, K; in, Seismological Society of America Meeting 2005: abstracts volume; . Seismological Research Letters vol. 76, no. 2, 2005; pages 220(ESS Cont.# 2004379)
Updating seismic hazard estimates of the northern Canadian Cordillera: a multidisciplinary approach; Cassidy, J F; Rogers, G C; Mazzotti, S; Hyndman, R D; Leonard, L; Ristau, J; Onur, T; Dragert, H; Adams, J; Halchuk, S; in, Seismological Society of America Meeting 2005: abstracts volume; . Seismological Research Letters vol. 76, no. 2, 2005; pages 264(ESS Cont.# 2004386)
Fault parameters of the Nisqually earthquake determined form moment tensor solutions and the surface deformation from GPS and InSAR; Bustin, A; Hyndman, R D; Lambert, A; Ristau, J; He, J; Dragert, H; Van der Kooij, M. Bulletin of the Seismological Society of America vol. 94, no. 2, 2004; pages 363-376(GSC Cont.# 2003031)
Geodetic and seismic signatures of episodic tremor and slip in the northern Cascadia subduction zone; Dragert, H; Wang, K; Rogers, G. Earth, Planets and Space vol. 56, no. 12, 2004; pages 1143-1150(ESS Cont.# 2004272)
Earthquake nucleation by transient deformations caused by the M=7.9 Denali, Alaska, earthquake; Gomberg, J; Bodin, P; Larson, K; Dragert, H. Nature (London) vol. 427, no. 6975, 2004; pages 621-624(ESS Cont.# 20060287)
Current tectonics of northern Casadia from a decade of GPS measurements; Mazzotti, S; Dragert, H; Henton, J; Schmidt, M; Hyndman, R; James, T; Lu, Y; Craymer, M. Journal of Geophysical Research vol. 108, no. B12, 2554, 2003; pages ETG 1 1-1 18(GSC Cont.# 2003113)
Episodic tremor and slip on the Cascadia Subduction Zone: the chatter of silent slip; Rogers, G; Dragert, H. Science vol. 300, no. 5627, 2003; pages 1942-1943(GSC Cont.# 2003022)
GPS deformation in a region of high crustal seismicity: N. Cascadia forearc; Mazzotti, S; Dragert, H; Hyndman, R D; Miller, M M; Henton, J A. Earth and Planetary Science Letters 198, 2002; pages 41-48(GSC Cont.# 2001036)
Three-dimensional viscoelastic interseismic deformation model for the Cascadia subduction zone ; Wang, K; He, J; Dragert, H; James, T S. Earth, Planets and Space 53, 2001; pages 295-306(GSC Cont.# 2000181)
A silent slip event on the deeper Cascadia Subduction Interface; Dragert, H; Wang, K; James, T S. Science vol. 292, no. 5521, 2001; pages 1525-1528(GSC Cont.# 2001002)
GPS-determination of along-strike variation in Cascadia margin kinematics: implications for relative plate motion, subduction zone coupling, and permanent deformation; Miller, M M; Johnson, D J; Rubin, C M; Dragert, H; Wang, K; Qamar, A; Goldfinger, C. Tectonics vol. 20, Heft 2, 2001; pages 161-176(ESS Cont.# 20060286)
Ocean loading corrections for continuous GPS: a case study at the Canadian coastal site Holberg ; Dragert, H; James, T S; Lambert, A. Geophysical Research Letters vol. 27, no. 14, 2000; pages 2045-2048(GSC Cont.# 1999258)
Tectonic deformation in western Washington from continuous GPS measurements; Khazaradze, G; Qamar, A; Dragert, H. Geophysical Research Letters vol. 26, no. 20, 1999; pages 3153-3156(ESS Cont.# 20060284)