current Projects



MARIANNA SOURCE AREA, CENTRAL U.S.



Project: Geophysical and Paleoseismological Investigations of the Marianna Earthquake Source in East-Central Arkansas (click for report)

Funding: National Earthquake Hazard Reduction Program managed by U.S. Geological Survey

Trench log: Vertical section of large sand blow, related sand dikes, and buried soil, Marianna, AR.



PUERTO RICO AND U.S. VIRGIN ISLANDS.



Project: Review of paleoliquefaction data, evaluation of scenario earthquakes, and estimation of source areas, magnitudes and recurrence of large earthquakes impacting Puerto Rico and the U.S. Virgin Islands (click for report)

Maps: Figure 1, Figure 2, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, Figure S1, Figure S2, Figure S3, Figure S4, Figure S5

Funding: National Earthquake Hazard Reduction Program managed by U.S. Geological Survey

Photo: Río Grande de Manati, PR



Recent Projects



CENTRAL VIRGINIA SEISMIC ZONE AND SURROUNDING REGION, MID-ATLANTIC COAST, U.S.



Project: Paleoliquefaction studies in the (northern and southern) Central Virginia seismic zone (click for report)

Project: Follow-up Paleoliquefaction Study in the Central Virginia seismic zone (click for report)

Funding: U.S. Nuclear Regulatory Commission


Project: Earthquake potential of the Central Virginia seismic zone (click for report)

Project: Improving estimates of the timing, locations, and magnitudes of paleoearthquakes in the Central Virginia seismic zone (click for report)

Funding: National Earthquake Hazard Reduction Program managed by the U.S. Geological Survey

Photo: Rivanna River, Virginia



PUERTO RICO AND ANTILLES SUBDUCTION ZONES, NORTHEASTERN CARIBBEAN



Project: Learning from Hurricane Irma, differentiating tsunami from hurricane deposits, and re-evaluating possible tsunami deposits on St. Thomas, U.S. Virgin Islands (click for report) Funding: National Earthquake Hazard Reduction Program managed by U.S. Geological Survey

Photo: Coastal pond at Saba Islet



MARIANNA SOURCE AREA, CENTRAL U.S.



Project: Paleoliquefaction study in the Marianna area southwest of the New Madrid seismic zone (click for report)

Funding: National Earthquake Hazard Reduction Program managed by U.S. Geological Survey

Photo: Large sand blow, Marianna, AR



NEW MADRID SEISMIC ZONE AND SURROUNDING REGION, CENTRAL U.S.



Project: Paleoliquefaction studies in moderate seismicity regions with a history of large events (click for report)

Funding: U.S. Nuclear Regulatory Commission

Photo: Aerial view of large sand blows near Blytheville, AR



NEW MADRID SEISMIC ZONE - WABASH VALLEY SEISMIC ZONE, CENTRAL U.S.



Project: Filling the gap in the paleoearthquake record between the New Madrid and Wabash Valley seismic zones (click for report)

Funding: National Earthquake Hazard Reduction Program managed by U.S. Geological Survey

Photo: Skillet Fork, IL



M. Tuttle & Associates


P.O. Box 345, Georgetown ME 04548 USA
Telephone: (207) 751-5617