Janet Watt

My research focuses on characterizing onshore/offshore geologic structure, deformation, and active tectonics to address problems focused on geologic hazards and framework geologic processes. My recent work involves the development and application of integrative geophysical approaches to 3D characterization of faults and fault interactions.

Biography

I received my M.S. in Marine Science (Geological Oceanography) from Moss Landing Marine Laboratories in 2004 while working at the U.S. Geological Survey in Menlo Park, CA. As part of the Geophysical Unit of Menlo Park (GUMP), I used potential-field methods (gravity and magnetics) and 3D geologic mapping to understand earthquake and volcano hazards, and mineral and water resources in the western U.S. In 2010, I returned to my marine geology roots and joined the Pacific Coastal and Marine Science Center in Santa Cruz, CA where I currently work as a Research Geophysicist.

Publications

Watt, J.; Ponce, D.; Parsons, T.; and Hart, P., 2016. Missing Link between the Hayward and Rodgers Creek Faults. Science Advances, doi: 10.1126/sciadv.1601441 

Langenheim, Victoria E.; Rymer, Michael J.; Catchings, Rufus D.; Goldman, Mark R.; Watt, Janet T.; Powell, Robert E.; Matti, Jonathan C., 2016. High-resolution gravity and seismic-refraction surveys of the Smoke Tree Wash area, Joshua Tree National Park, California. U.S. Geological Survey Open-File Report 2016-1027, Report: iii, 15 p. [Link]

Watt, Janet Tilden; Johnson, Samuel Y.; Hartwell, Stephen R.; Roberts, Michelle, 2015. Offshore geology and geomorphology from Point Piedras Blancas to Pismo Beach, San Luis Obispo County, California. U.S. Geological Survey Scientific Investigations Map 3327, Pamphlet: iii, 6 p.; 6 Sheets [Link]

Watt, Janet T.; Dartnell, Peter; Golden, Nadine E.; Greene, H. Gary; Erdey, Mercedes D.; Cochrane, Guy R.; Johnson, Samuel Y.; Hartwell, Stephen R.; Kvitek, Rikk G.; Manson, Michael W.; Endris, Charles A.; Dieter, Bryan E.; Sliter, Ray W.; Krigsman, Lisa M.; Lowe, Erik N.; Chinn, John L.Watt, Janet T.; Cochran, Susan A., 2015. California State Waters Map Series: Drakes Bay and vicinity, California. U.S. Geological Survey Open-File Report 2015-1041, Pamphlet: iv, 36 p.; 10 Sheets [Link]

Watt, Janet T.; Dartnell, Peter; Golden, Nadine E.; Greene, H. Gary; Erdey, Mercedes D.; Cochrane, Guy R.; Johnson, Samuel Y.; Hartwell, Stephen R.; Kvitek, Rikk G.; Manson, Michael W.; Endris, Charles A.; Dieter, Bryan E.; Sliter, Ray W.; Krigsman, Lisa M.; Lowe, Erik; Chinn, John L.; Cochran, Susan, 2015. California State Waters Map Series-Offshore of Point Reyes, California. U.S. Geological Survey Open-File Report 2015-1114, Pamphlet: iv, 39 p.; 10 Sheets [Link]

Cochrane, Guy R.; Watt, Janet T.; Dartnell, Peter; Greene, H. Gary; Erdey, Mercedes D.; Dieter, Bryan E.; Golden, Nadine E.; Johnson, Samuel Y.; Endris, Charles A.; Hartwell, Stephen R.; Kvitek, Rikk G.; Davenport, Clifton W.; Krigsman, Lisa M.; Ritchie, Andrew C.; Sliter, Ray W.; Finlayson, David P.; Maier, Katherine L.Cochrane, Guy R.; Cochran, Susan A., 2015. California State Waters Map Series—Offshore of Pigeon Point, California. U.S. Geological Survey Open-File Report 2015-1232, Pamphlet: iv, 40 p.; 10 Sheets: 50.50 x 36.00 inches or smaller; Data Catalog; Metadata [Link]

Cochrane, Guy R.; Dartnell, Peter; Greene, H. Gary; Watt, Janet T.; Golden, Nadine E.; Endris, Charles A.; Phillips, Eleyne L.; Hartwell, Stephen R.; Johnson, Samuel Y.; Kvitek, Rikk G.; Erdey, Mercedes D.; Bretz, Carrie K.; Manson, Michael W.; Sliter, Ray W.; Ross, Stephanie L.; Dieter, Bryan E.; Chin, John L.; edited by Cochrane, Guy R.; Cochran, Susan A.Cochrane, Guy R.; Cochran, Susan A., 2014. California State Waters Map Series: offshore of San Gregorio, California. U.S. Geological Survey Scientific Investigations Map 3306, Pamphlet: iv, 38 p.; 10 Plates [Link]

Watt, J.T., Ponce, D.A., Graymer, R.W., Jachens, R.C., and Simpson, R.W., 2014, Subsurface geometry of the San Andreas-Calaveras fault junction: Influence of serpentinite and the Coast Range Ophiolite: Tectonics, doi: 10.1002/2014TC003561 [Download File]

Sliter, Ray W.; Johnson, Samuel Y.; Watt, Janet T.; Scheirer, Daniel S.; Allwardt, Parker ; Triezenberg, Peter J., 2013. High-resolution seismic-reflection and marine-magnetic data from offshore central California--San Gregorio to Point Sur. U.S. Geological Survey Open-File Report 2013-1071

Johnson, S.Y. and Watt, J.T., 2012, Influence of fault trend, bends, and convergence on shallow structure and geomorphology of the Hosgri strike-slip fault, offshore Central California: Geosphere, v. 8, no. 6, 25p. [Download File]

Ponce, David A.; Watt, Janet T.; Bouligand, C., 2011. Geophysical setting of the February 21, 2008 Mw 6 Wells earthquake, Nevada, and implications for earthquake hazards. Nevada Bureau of Mines and Geology Special Publication 36, 12 p. [Link]

Watt, J.T., Ponce, D.A., Graymer, R.W., Simpson, R.W., Jachens, R.C., and Wentworth, C.M., 2011, The Mt. Lewis fault zone: Tectonic implications for eastern San Francisco Bay Area, in Knudsen, K., ed., Proceedings of the third conference on earthquake hazards in the eastern San Francisco Bay area—Science, hazard, engineering and risk: California Geological Survey Special Report 219, p. 313-322. [Download File]

Ponce, David A.; Glen, Jonathan M. G.; Egger, Anne E.; Bouligand, Claire; Watt, Janet T.; Morin, Robert L., 2009. Geophysical Studies in the Vicinity of the Warner Mountains and Surprise Valley, Northeast California, Northwest Nevada, and Southern Oregon. U.S. Geological Survey Open-File Report 2009-1157, 19 p. [Link]

Sliter, Ray W.; Triezenberg, Peter J.; Hart, Patrick E.; Watt, Janet T.; Johnson, Samuel Y.; Scheirer, Daniel S., 2009. High-Resolution Seismic-Reflection and Marine Magnetic Data Along the Hosgri Fault Zone, Central California. U.S. Geological Survey Open-File Report 2009-1100 [Link]

Ponce, David A.; Watt, Janet T.; Casteel, John; Logsdon, Grant, 2009. Physical-Property Measurements on Core samples from Drill-Holes DB-1 and DB-2, Blue Mountain Geothermal Prospect, North-Central Nevada. U.S. Geological Survey Open-File Report 2009-1022, 16 p. [Link]

Watt, Janet T.; Ponce, David A., 2007. Geophysical Framework Investigations Influencing Ground-Water Resources in East-Central Nevada and West-Central Utah. Geological Survey (U.S.) Open-File Report 2007-1163, Report: iv, 43 p. (With a section on Geologic and Geophysical Basin-by-basin Descriptions by Alan R. Wallace, Janet T. Watt, and David A. Ponce); 2 Plates [Link]

Morin, Robert L.; Wheeler, Karen L.; McPhee, Darcy K.; Dinterman, Philip A.; Watt, Janet T., 2007. Principal Facts of Gravity data in the Northern Willamette Valley and Vicinity, Northwestern Oregon and Southwestern Washington. Open-File Report 2007-1058, 9 p.; map, 24 by 24 inches; data files [Link]

Watt, J.T., Glen, J.M.G., John, D.A., Ponce, D.A., 2007, Three-dimensional geologic model of the northern Nevada rift and the Beowawe geothermal system, north-central Nevada, Geosphere, v. 3, no. 6, p.667-682. [Download File]

Selected Media and Public Outreach

November 18, 2016, CBS This Morning "California prepares for next big earthquake"

October 19, 2016, Popular Mechanics "Two dangerous Fault Lines Under San Francisco Are Connected, Study Finds

February 1, 2016, Temblor.net Earthquake News & Blog, "Why don't the earthquakes line up with the San Andreas fault?"

January 2, 2016, CBS NEWS, "Alarming Discovery Shows Bay Area’s 2 Most Dangerous Earthquake Faults May Be Connected"

December 31, 2015, San Francisco Chronicle, "New data on 2 Bay Area faults cause worry about next big quake"

November 20, 2014, KQED Science "Using 3D Visualization, Geologists Explore the Complex Areas Where Faults Join and Split"