News/Media Releases
Cascadia Earthquake Catalog 1793-1929
The Cascadia Catalog covers
Washington, Oregon and British Columbia. It is based on a compilation of verbatim
accounts from a dozen earlier earthquake catalogs (covering a variety of geographic
areas and time ranges), with the addition of newspaper articles, weather observers'
reports, diary entries, and other pieces of information about historic earthquakes
in Washington, Oregon, and British Columbia between the years of 1793 and 1929.
In addition to event summaries, the verbatim text of the original sources is
available. Of the 677 events cataloged, over 100 are previously uncataloged.
Over 400 information sources, in addition to the dozen catalogs included, have
been incorporated into this catalog.
Future Dangers - by John Vidale - Incoming Director of the PNSN, Seismological Research Letters, 2006, Vol. 77, No. 4.
Cascadia Arrays for EarthScope - CAFE
The
Orphan Tsunami of 1700 - Japanese Clues to a Parent Earthquake
in North America, by Brian Atwater, UW Press
In
this richly illustrated book, Brian Atwater and a team of fellow
scientists use Japanese historical documents and geological evidence
from the Pacific Northwest coast to describe a massive earthquake
and tsunami that hit Japan in the year 1700, an event similar to
the January 2005 Indian Ocean tsunami. Atwater was named one of TIME
Magazine's 100 most influential people of 2005 for his tsunami
research. Browse
through the book online
SEATTLE POST-INTELLIGENCER: Seattle's readiness for disaster in doubt
(Saturday, September 10, 2005) City bridges, buildings seen as weak links in quake plans
We don't live below sea level or experience hurricanes, but Seattle -- sitting on a seismic fault believed capable of producing a massive quake -- ranks right up there with New Orleans when it comes to its risk of catastrophic natural disaster. Unfortunately, some experts say, we also share with New Orleans a tendency to delay taking some of the actions needed to reduce damage and loss of life.
SEATTLE POST-INTELLIGENCER: Denial can lead to a disaster just as easily here (Wednesday, September 7, 2005) A hostile, raspy voice has twice come on the phone after columns in this space discussed the magnitude-9 earthquake that strikes the northern Pacific Coast every 300 to 400 years.
"You are just trying to scare people," it recently intoned.
The voice had been provoked at my references to the last "Big One." An offshore "megathrust," or "subduction," shook the coast from California's Humboldt Bay to Vancouver Island early on Jan. 26, 1700. We can tell even its time from radiocarbon dating of cedar snags at the Copalis River and written records of the tsunami that struck Japan.
The caller hung up in midexplanation. She did not wish to hear why the Alaskan Way Viaduct is a pressing issue.
Seattle Fault Native American Serpent-Power Stories - July 2005
Native American stories used to date 1700 Cascadia Earthquake - April 2005
SEATTLE POST-INTELLIGENCER:Tsunami experts meet at UW to study disaster (Monday, June 13, 2005) The rest of the world may give less thought these days to the Indian Ocean tsunami, but a small cadre of scientists remains fascinated, horrified and perhaps even a bit confused by the natural disaster that killed about 200,000 on Dec. 26.
Portland Oregonian: Report
paints grim picture of Northwest after big quake (Wednesday May 25, 2005)A group urges education programs and construction upgrades to help the region prepare for a catastrophe. The earthquake could be "catastrophic" and "will certainly be larger than local or regional resources can respond to," the report states. It urges that education programs teach residents and visitors how to prepare for such an earthquake; high-risk buildings be retrofitted; key buildings such as hospitals, schools and fire stations be improved to withstand the
shaking; and transportation infrastructure be upgraded.
SEATTLE POST-INTELLIGENCER: Report gives fine details of potential mega-quake ( Wednesday, April 20, 2005) On the second Tuesday in July, a massive, magnitude-9 earthquake -- much like the one that devastated Sumatra on Dec. 26 -- will be produced off the Pacific Northwest coast. But this mega-quake will be produced only in concept today at a hotel in Bellevue, by a group of scientists, engineers, planners and business leaders who want to encourage better preparation for the day when the Cascadia Subduction Fault zone erupts again.
Times Magazine 2005 Top 100: Brian Atwater -- In Search of the Great Tsunami (April 2005) What does the scratched-up canoe that sits outside geologist Brian Atwater's Seattle home have to do with the destructive power of tsunamis? Quite a bit: it was in his canoe, paddling around the salt marshes and tidal flats of Washington State, that Atwater discovered evidence of earthquakes and giant waves of a magnitude that seemed, to many, inconceivable--until late last year, when a tsunami of similar power tore across the Indian Ocean, killing more than 200,000.
SMITHSONIAN MAGAZINE: Future Shocks--Modern science, ancient catastrophes and the endless quest to predict earthquakes (March 2005)
Brian Atwater paddled a battered aluminum canoe up the Copalis River, pushed along by a rising Pacific tide. The river wound through wide salt marshes fringed with conifers growing on high ground. The scene, softened by gray winter light and drizzle, was so quiet one could hear the whisper of surf a mile away. But then Atwater rounded a bend, and a vision of sudden, violent destruction appeared before him: stranded in the middle of a marsh were dozens of towering western red cedars, weathered like old bones, their gnarly, hollow trunks wide enough to crawl into. "The ghost forest," Atwater said, pulling his paddle from the water. "Earthquake victims."
KING COUNTY JOURNAL: Quake scenario paints scary scene (March 1, 2005)
It's called the Seattle Fault but a more apt name might be the I-90 Fault
since it runs more or less alongside the interstate from just north of
Issaquah, 14 miles to Seattle's Harbor Island. By whatever name, however,
when the next major earthquake is triggered on the fault, the consequences
will be devastating, according to a scenario developed by seismologists,
geologists, engineers, emergency managers, planners and others.
SEATTLE TIMES: Experts outline steps to cut quake damage (Tuesday, March 1, 2005) There's no denying a major earthquake on the Seattle Fault would be nasty. But there are many ways to prevent a bad situation from being even worse, said several participants at an earthquake workshop yesterday in Bellevue — a scant mile from where the fault slices through the city of 117,000.
SEATTLE POST-INTELLIGENCER: Experts predict 1,600 could die in quake (Tuesday, March 1, 2005) Puget Sound area still unprepared for such a disaster.
Four years to the day after the Nisqually Quake, experts at a conference yesterday warned that most Puget Sound-area communities still are not even close to being prepared for a major quake.
SEATTLE TIMES: Pinpointing devastation if Seattle Fault ruptures (Sunday, February 20, 2005) The scenario, which will be unveiled in a daylong workshop in Bellevue on Feb. 28, uses a sophisticated computer model and the collective expertise of dozens of local engineers, scientists and emergency managers to forecast the devastation that would be wrought by a magnitude 6.7 earthquake on the Seattle Fault.
SEATTLE POST-INTELLIGENCER: 'Tsunami on its way, gonna happen any day' (Thursday, February 10, 2005) Preparedness, resignation at coastal summit
SEATTLE POST-INTELLIGENCER: New findings super-size our tsunami threat (Monday, February 7, 2005) 80-foot waves blasted Indonesia, scientists now say
The Indian Ocean Tsunami - What it means for Cascadia
June-July 2004 - Ongoing Earthquake Sequence near Lakeview, in southern Oregon July 8-24,2004
Silent Earthquake Under Northwestern Washington & B.C. (July 8-24, 2004)
7/12/04 - Magnitude 4.9 offshore earthquake felt in Newport Oregon and surrounding communities
06/3/04 - Meteor Burst over Snohomish
May 2004 - Silent Earthquake Under Southwestern Washington, May 3-18
April 21, 2004 Press Release - NBC miniseries "10.5"? - It's full of errors and that makes it GOOFY!
March 24 2004 - Earthquake Swarm at Three Sisters, Oregon
March 2004 - Update on Puget Sound Crustal Structure
NEWS RELEASE-Old Japanese Documents Confirm Warnings of Future North American Earthquakes (November 20, 2003)
Writing this week in the American Geophysical Union's Journal of
Geophysical Research, scientists from Japan, Canada and the United States summarize old reports of flooding and damage by a tsunami in 1700 on the Pacific coast of Japan.
With the aid of computer simulations, they conclude this tsunami required a North American earthquake close to magnitude 9. Such an earthquake, in a few minutes, would release about as much energy as the United States now consumes in a month.
The News Tribune - Tacoma, WA: Tacoma Fault poses a threat (November 3, 2003)
Researchers Sunday unveiled their first firm evidence that a Tacoma fault line exists and that it's larger than they suspected.
Now, the challenge is to home in on where the Tacoma Fault runs. In the winter, researchers will study the White River Fault near Enumclaw and whether it connects with the Tacoma Fault, Brian Sherrod of the U.S. Geological Survey told an international conference of geoscientists in Seattle.
The Tacoma Fault "adds yet another reminder that we live in an area that's prone to big earthquakes," said Sherrod, who is also affiliated with the University of Washington. "It adds another piece of the tectonic puzzle."
Seattle Post-Intelligencer: Newly found fault shakes up beliefs about regional quakes (September 10, 2003)
Using everything from a highly sophisticated airborne laser to a ground-based backhoe, scientists have found a new fault on Bainbridge Island that challenges some of their basic beliefs about the seismic time bomb that runs beneath Seattle.
"This means we need to fundamentally change our view of the geometry of the Seattle Fault," said Brian Sherrod, a field geologist with the U.S. Geological Survey.
What the scientists found on Bainbridge was evidence of perhaps two prehistoric earthquakes that sent up massive blocks of land -- in the wrong direction.
Seattle Times: Mysterious 1872 quake yields clues for future (July 22, 2003) Alison Bickerstaff. Ruth Ludwin and fellow researchers at the University of Washington, including three U.S. Geological Survey scientists, say a deeper knowledge of the largest crustal earthquake in Washington state's history will help to define the risks other quakes pose east of the Cascades.
The 1872 Earthquake - The PNW's largest historic crustal earthquake - located near Entiat - Magnitude estimated at 6.8-7.4 (December 2002)
The Oregonian: Science - Landslide Sleuths (May 15,2002) Richard Hill, The Oregonian science writer, reports on evidence that the great Bonneville landslide in the Columbia River basin, resulted from shaking during the Great Cascadia earthquake in 1700.
Fault Publication April 15, 2002 Active Tectonics of the Devils Mountain Fault and Related Structures, Northern Puget Lowland and Eastern Strait of Juan de Fuca Region, Pacific Northwest USGS Prefessional Paper 1643
LIDAR Data Online March 3, 2002
LIDAR (LIght Distance And Ranging, also known as Airborne Laser Swath Mapping or ALSM) is a relatively new technology that employs an airborne scanning laser rangefinder to produce accurate topographic surveys of unparalleled detail.