Navigation Links
UCSB scientists compile first study of potential for tsunamis in northwestern California
Date:6/27/2012

(Santa Barbara, Calif.) Using studies that span the last three decades, scientists at UC Santa Barbara have compiled the first evidence-based comprehensive study of the potential for tsunamis in Northwestern California. The paper, "Paleoseismicity of the Southern End of the Cascadia Subduction Zone, Northwestern California," was co-written by professors Edward Keller and Alexander Simms from UCSB's Department of Earth Science, and published in a recent issue of the Bulletin of the Seismological Society of America.

The paper is based on the Ph.D. dissertation of David Valentine, a research programmer at the Spatial Information Systems Laboratory at UC San Diego. Valentine, Keller's former student, completed his doctorate at UCSB in 2002 and is first author of the paper.

The region has long been known to experience large earthquakes, and scientific studies of seismic activity in the southern end of the Cascadia Subduction Zone (CSZ) which stretches northward from the area of Mendocino, Calif. have previously appeared in grey literature and in guidebooks. However, comprehensive, reviewed evidence-based work has been lacking, according to Keller.

"Science goes on evidence," he said, adding that in light of the recent earthquakes in Japan and Chile, the study of the same potential closer to home is "timely." The authors studied sedimentation patterns in salt marshes, floodplains, and estuaries in the northwestern corner of California for signs of seismic events that could lead to tsunami activity. They combined this with information gathered from numerous studies conducted over nearly 30 years by researchers at Humboldt State University

During an earthquake, the researchers say, there is a tendency for the coastal wetlands to become submerged, with coastal sediments depositing over plants and animals that live there. These become a fossilized record of sea-level change in the area.

The process has preserved a sequence of marsh surfaces and forest soils. Analysis of structure, texture, and organic content, as well as the use of radiocarbon dating to identify the age of the materials, revealed evidence of smaller strong-to-major earthquakes in the area (magnitude 6.5 to 7.2). Larger quakes (greater than magnitude 8.2) that involved the regional subduction zone, were also in evidence.

According to the study, the local California section has experienced three major earthquakes over the last 2000 years, and accompanying local sea-level changes at roughly 300- to 400-year intervals, with the last one occurring 500 to 600 years ago. The researchers also found that the entire CSZ erupted, causing local submergence at least three times in roughly 500- to 600- year intervals, the last activity taking place in 1700 AD.

"It's not a matter of if, but when," said Keller, of the potential for the next major earthquake/tsunami event in the region a great earthquake that would impact not only the Northwest, but also send waves to Japan and Hawaii. The evidence, he said, is leading to far more foresight and planning along the impact areas in the region to avoid catastrophes on a level with the Japan earthquake of 2011 or the Indian Ocean quake of 2004.


'/>"/>

Contact: Sonia Fernandez
sonia.fernandez@ia.ucsb.edu
805-893-4765
University of California - Santa Barbara
Source:Eurekalert

Related biology news :

1. Stanford scientists develop gene therapy approach to grow blood vessels in ischemic limbs
2. Queens scientists seek vaccine for Pseudomonas infection
3. Scientists produce eye structures from human blood-derived stem cells
4. American Society of Plant Biologists honors early career women scientists
5. Brandeis scientists win prestigious prize for circadian rhythms research
6. Scientists discover new method of proton transfer
7. Salk scientists open new window into how cancers override cellular growth controls
8. WileyChina.com - Now Featuring Bespoke Pages for China’s Life Scientists
9. Scientists win $2 million to study new pathway in development and maintenance of lymphoma
10. UGA scientists reveal genetic mutation depicted in van Goghs sunflower paintings
11. Genetic mutation depicted in van Goghs sunflower paintings revealed by scientists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/13/2017)... According to a new market research report "Consumer IAM Market by ... Service, Authentication Type, Deployment Mode, Vertical, and Region - Global Forecast to ... USD 14.30 Billion in 2017 to USD 31.75 Billion by 2022, at ... ... MarketsandMarkets Logo ...
(Date:4/11/2017)... MELBOURNE, Florida , April 11, 2017 ... "Company"), a security technology company, announces the appointment of independent ... John Bendheim to its Board of Directors, furthering the ... ... behalf of NXT-ID, we look forward to their guidance and ...
(Date:4/5/2017)... 4, 2017 KEY FINDINGS The ... at a CAGR of 25.76% during the forecast period ... primary factor for the growth of the stem cell ... MARKET INSIGHTS The global stem cell market ... and geography. The stem cell market of the product ...
Breaking Biology News(10 mins):
(Date:4/21/2017)... ... April 21, 2017 , ... The ... 10 categories with over 30 nominees and well as the first-year award for ... award and the event was hosted by CompanyWeek and Manufacturers Edge, among other ...
(Date:4/21/2017)... ... , ... Frederick Innovative Technology Center, Inc. (FITCI), a business ... start-ups, is hosting “Celebration Friday” (a festive gathering highlighting client success stories) and ... networking at 3:30 p.m. at FITCI’s 4539 Metropolitan Court location, off English Muffin ...
(Date:4/20/2017)... ... April 20, 2017 , ... USDM Life Sciences , ... sciences and healthcare industries, is pleased to announce Holger Braemer as Vice ... “USDM Europe GmbH” based in Germany. , Braemer is an integral part of ...
(Date:4/20/2017)... San Diego, CA (PRWEB) , ... April 20, 2017 , ... ... and management of clinical trials worldwide, announced today that they were named one of ... magazine , which covers the latest developments in the pharmaceutical industry. , “We take ...
Breaking Biology Technology: