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Great Earthquakes & Tsunamis; A 2000-year Record Along the Nehalem River Estuary

March 29, 2021 @ 3:00 pm - 4:30 pm

Free

Great Earthquakes & Tsunamis; A 2000-year Record Along the Nehalem River Estuary

Zoom Webinar

Monday, March 29,  3:00 p.m.

Participation is limited    REGISTER NOW at this link

The Sediments in wetland along Nehalem Bay hold evidence about prehistoric earthquakes. How large were they? When did they occur? Did they generate tsunamis?

How do we know that any given change in Nehalem Bay wetland sediments is a record of a great earthquake, rather than other coastal processes, such as large river floods, winter storms, or sea-level rise?

Starting back in 1987, geologists have studied stratigraphic evidence that can reveal the story of sudden changes in wetland environments around the lower part of the Nehalem River estuary. Three coastal geologists involved in the most recent of these studies, published in 2020, will describe how difficult it is to identify great earthquakes, and explain the new methods they used to estimate when they occurred, and their magnitudes.

For Information:    

Ben Pittenger, Executive Director, Lower Nehalem Community Trust

ben@nehalemtrust.org   (503) 368-3203

VENUE: This event will be held via Zoom.

REGISTRATION: Participation is limited. Register today to hear Alan Nelson, Andrea Hawkes, and Tina Dura discuss their research on sediments in Botts Marsh and other areas of Nehalem River Estuary, and the story they tell about prehistorical earthquakes..

SPEAKER BIOS:

Alan Nelson is an emeritus paleoseismologist with the U.S. Geological Survey in Golden, Colorado. Paleoseismologists study evidence for large, prehistoric earthquakes to decipher the earthquake histories of major hazardous faults. He has been studying the history of great earthquakes and tsunamis in Oregon and Washington intermittently since 1986 and has done similar research in Alaska and Chile.

 

Andrea Hawkes is a Professor in the Earth and Ocean Sciences Department and Centre for Marine Science at the University of North Carolina Wilmington, Wilmington, North Carolina. Hawkes has been using microfossils and sediment studies to reconstruct coastal changes for more than 20 years, with a focus on coastal hazards from earthquakes, storms, and sea-level rise on the U.S. west and east coasts, and abroad.

 

 

Tina Dura is an Assistant Professor in the Department of Geosciences at Virginia Polytechnic Institute and State University in Blacksburg, Virginia. Tina combines the methods of coastal stratigraphy, sedimentology, micropaleontology, paleoseismology, geophysical and sediment transport modeling, and sea-level research to reconstruct long-term histories of uplift or subsidence and tsunami inundation along the coasts of subduction zones, such as in the U.S Pacific Northwest, Chile, and Alaska.

 

REGISTER FOR EVENT

Details

Date:
March 29, 2021
Time:
3:00 pm - 4:30 pm
Cost:
Free
Website:
https://zoom.us/webinar/register/2516152907952/WN_YBxwIECkQ0uB7L-DiuOupw

Organizer

LNCT
Phone
(503) 368-3203
Email
lnct@nehalemtrust.org
View Organizer Website