earthquakes & seismology
January 29, 2024
Q&A: How ‘slow slip’ earthquakes may be driven by deep hydraulic fracturing
New research confirms the cause of slow slip along the Cascadia Subduction Zone and other faults that is accompanied by intermittent tremors or “pops” at the surface. Co-authors Marine Denolle and Joan Gomberg discuss the role of fluid-driven fracturing deep underground.
November 16, 2023
In the Field: Tracking seismic clues in one of the driest places on Earth
Two University of Washington geophysicists will travel to the Atacama Desert in Chile this month to study a fault system that’s similar to the Seattle Fault in Puget Sound, but in a much different climate that makes it easier to monitor its effects on the landscape.
September 8, 2023
UW a lead partner on new NSF-funded earthquake research center
The University of Washington is a lead partner on a new multi-institution earthquake research center that will study the Cascadia subduction zone and bolster earthquake preparedness in the Pacific Northwest and beyond.
April 10, 2023
Warm liquid spewing from Oregon seafloor comes from Cascadia fault, could offer clues to earthquake hazards
UW oceanographers discovered warm, chemically distinct liquid shooting up from the seafloor about 50 miles off Newport. They named the unique underwater spring “Pythia’s Oasis.” Observations suggest the spring is sourced from water 2.5 miles beneath the seafloor at the plate boundary, regulating stress on the offshore subduction zone fault.
February 3, 2023
Ice cores show even dormant volcanoes leak abundant sulfur into the atmosphere
Non-erupting volcanoes leak a surprisingly high amount of sulfur-containing gases. A Greenland ice core shows that volcanoes quietly release at least three times as much sulfur into the Arctic atmosphere than estimated by current climate models. Aerosols are the most uncertain aspect of current climate models, so better estimates could improve the accuracy of long-term projections.
December 12, 2022
Signals from the ionosphere could improve tsunami forecasts
An underwater volcanic eruption in January 2022 created ripple effects throughout the world’s atmosphere and oceans. University of Washington scientists analyzed that event to show how GPS signals could help monitor future volcanoes and tsunamis.
September 22, 2022
Deepest scientific ocean drilling effort sheds light on Japan’s next ‘big one’
A 2018 expedition that drilled farther into the seafloor than ever before — almost 2 miles — sought to take measurements of stress as close as possible to a tectonic fault off the coast of Japan. Surprisingly, the researchers found little built-up tectonic stress. The findings could help to better understand earthquakes in subduction zones around the world.
August 17, 2022
New UW Photonic Sensing Facility will use fiber-optic cables for seismic sensing, glaciology and more
A University of Washington pilot project is exploring the use of fiber-optic sensing for seismology, glaciology, and even urban monitoring. Funded in part with a $473,000 grant from the M.J. Murdock Charitable Trust, a nonprofit based in Vancouver, Washington, the new UW Photonic Sensing Facility will use photons traveling through a fiber-optic cable to detect ground motions as small as 1 nanometer.
December 8, 2021
Simulations show how earthquake early warning might be improved for magnitude-9 earthquakes
Seismologists used 30 detailed simulations of magnitude-9 slips on the Cascadia Subduction Zone to evaluate how the ShakeAlert earthquake early warning system would perform in these events. Results show the alerts generally work well, but suggest that lower alert thresholds provide more timely warnings over the full area that will feel the shaking.
May 6, 2021
Soundbites & B-roll: Pacific Northwest Seismic Network, partners activate earthquake early warnings
Earthquake early warnings launched May 4 in Washington state. The Pacific Northwest Seismic Network helped develop the system, processes the data for the alerts, and operates hundreds of seismic stations across the state that detect the first signs of an earthquake.
May 3, 2021
Earthquake early warnings launch in Washington, completing West Coast-wide ShakeAlert system
The U.S. Geological Survey, the University of Washington-based Pacific Northwest Seismic Network, and state emergency managers on Tuesday, May 4, will activate the system that sends earthquake early warnings throughout Washington state. This completes the rollout of ShakeAlert, an automated system that gives people living in Washington, Oregon and California advance warning of incoming earthquakes.
April 13, 2021
Deep earthquakes within the Juan de Fuca plate produce few aftershocks
In the Cascadia subduction zone, medium- and large-sized “intraslab” earthquakes, in which the slip happens within the oceanic plate and below the continental plate, will likely produce only a few detectable aftershocks, according to a new study from the University of Washington and the U.S. Geological Survey.
February 17, 2021
Q&A: ShakeAlert earthquake early warning system arriving in Pacific Northwest
After years in development, an earthquake early warning system known as ShakeAlert is on the cusp of being released in Oregon and Washington. Harold Tobin, director of the Pacific Northwest Seismic Network, answers questions about the coming rollout.
September 16, 2020
Most landslides in western Oregon triggered by heavy rainfall, not big earthquakes
Researchers at the University of Washington, Portland State University and the University of Oregon have shown that deep-seated landslides in the central Oregon Coast Range are triggered mostly by rainfall, not by large offshore earthquakes. The open-access paper was published Sept. 16 in Science Advances. “Geomorphologists have long understood the importance of rainfall in triggering…
August 19, 2019
USGS awards $10.4M to ShakeAlert earthquake early warning system in the Pacific Northwest
The U.S. Geological Survey announced $10.4 million in funding to the Pacific Northwest Seismic Network, based at University of Washington, to support the ShakeAlert earthquake early warning system. Some $7.3 million of the two-year funding total will go to the UW.
May 30, 2019
Seismologists seek space on volunteers’ floors and lawns to study Seattle seismic risks
A series of seismic experiments will take place this summer in the Seattle area. The researchers are looking for volunteer sites throughout the region.
October 4, 2018
Q&A with Harold Tobin, director of the Pacific Northwest Seismic Network
Harold Tobin, who joins the UW this fall as a faculty member in Earth and space sciences and director of the regional seismic sensing network, discusses earthquake early warning, seismic risks and the Pacific Northwest’s “big one.”
October 23, 2017
50 simulations of the ‘Really Big One’ show how a 9.0 Cascadia earthquake could play out
The largest number yet of detailed simulations for how a Cascadia Subduction Zone earthquake might play out provides a clearer picture of what the region can expect when the fault unleashes a 9.0 earthquake.
October 9, 2017
Paul Bodin named interim director of Pacific Northwest Seismic Network
Paul Bodin, a UW seismologist and manager of the Pacific Northwest Seismic Network, has been named interim director of the network that monitors earthquakes and volcanoes in Washington and Oregon.
September 21, 2017
Hacking a pressure sensor to track gradual motion along marine faults
University of Washington oceanographers are working with a local company to develop a simple new technique that could track seafloor movement in earthquake-prone coastal areas.
September 7, 2017
Land-sea experiment will track earthquakes, volcanoes along Alaska Peninsula
The National Science Foundation is funding the largest marine seismic-monitoring effort yet along the Alaska Peninsula, a region with frequent and diverse earthquake and volcanic activity. Involving aircraft and ships, the new Alaska Amphibious Community Seismic Experiment will be led by Cornell University in Ithaca, New York, with partners at the University of Washington and…
April 10, 2017
USGS, partners launch a unified, West Coast-wide earthquake early warning system
Events Monday celebrated the launch of a West Coast-wide earthquake early warning prototype system, and initial test users in Washington and Oregon.
March 28, 2017
Using a method from Wall Street to track slow slipping of Earth’s crust
An algorithm for stock prices can be used with GPS data to automatically detect slow-slip earthquakes at a single station, offering a new way to monitor seismic activity.
December 15, 2016
Underwater volcano’s eruption captured in exquisite detail by seafloor observatory
The cracking, bulging and shaking from the eruption of a mile-high volcano where two tectonic plates separate has been captured in more detail than ever before. A University of Washington study published this week shows how the volcano behaved during its spring 2015 eruption, revealing new clues about the behavior of volcanoes where two ocean…
November 2, 2016
New study co-authored by UW geologists looks at what lies below Mount St. Helens
Research that peers below Mount St. Helens finds that the material below the western and eastern half of the mountain is different material and temperatures, and suggests that the source of explosive magma is coming from the east.
February 2, 2016
UW awarded private, public grants to develop earthquake early warning tool
The UW is among West Coast universities awarded new funding to further develop ShakeAlert, an earthquake early warning system for the region.
February 1, 2016
UW seismologist speaking at White House earthquake preparedness summit
UW seismologist John Vidale will participate in a White House summit focusing on national earthquake preparedness.
December 16, 2015
UW Tacoma geoscientist tracked risks from deadly 2015 Nepal earthquake
When an earthquake struck Nepal in late April 2015, thousands of lives were lost in the initial disaster. But it was hard to assess the scale of the damage to rural areas, and still lurking were threats from unstable slopes and dammed glacier-fed lakes that could dislodge at any time to flood villages below. A…
August 17, 2015
UW researchers model tsunami hazards on the Northwest coast
Recent press and social media coverage have reminded residents of the Pacific Northwest that they live in a seismically active region. Stretching offshore from northern California to British Columbia, the Cascadia subduction zone could slip at any time, causing a powerful earthquake and triggering a tsunami that would impact communities along the coast. Scientists from…
August 13, 2015
Documents that Changed the World: Charles Richter’s seismic scale, 1935
A scale of simple numbers — the Richter Scale — unnerves us when we think about earthquakes, as Pacific Northwest residents have been prone to do lately. But who was Richter, and how did it all come about? Joe Janes takes a look for an installment of his Documents that Changed the World podcast series.
April 27, 2015
Tidal tugs on Teflon faults drive slow-slipping earthquakes
Teasing out how slow, silent earthquakes respond to tidal forces lets researchers calculate the friction inside the fault, which could help understand when and how the more hazardous earthquakes occur.
February 11, 2015
Earthquake early warning begins testing in Pacific Northwest
The first early earthquake warning system for the region has begun testing with a small group of users at businesses and public agencies in Washington, Oregon and British Columbia.
January 27, 2015
UW researchers helping region get ready for the next Big One
On the anniversary of a massive earthquake off our region’s coast, UW researchers are working on everything from tsunami evacuation structures to updated seismic hazard maps.
January 7, 2015
How the ‘Beast Quake’ is helping scientists track real earthquakes
Scientists with the Pacific Northwest Seismic Network will install instruments this Thursday to provide real-time monitoring of the stadium’s movement during the 2015 NFL playoffs. It’s a valuable test of their newest seismic technology.
August 15, 2014
Research from 1960s shakes up understanding of West Coast earthquakes
A new study used seabed samples collected by UW graduate students in the late 1960s to question current interpretations of earthquake frequency along the West Coast.
July 17, 2014
Geophysicists prep for massive ‘ultrasound’ of Mount St. Helens
Dozens of geophysicists and volunteers will deploy 3,500 seismic sensors at Mount St. Helens next week in an unprecedented study of the volcano’s plumbing.
January 17, 2014
UW seismologists expand stadium monitoring for NFC championship game
UW scientists installed a third seismograph at CenturyLink Field this week after the trial by fire of a website and new monitoring tools during last weekend’s Seahawks game.
July 14, 2013
Some volcanoes ‘scream’ at ever-higher pitches until they blow their tops
Swarms of small earthquakes before a volcanic eruption can come in such rapid succession that they create a signal called harmonic tremor. A new eruption analysis from Alaska’s Redoubt Volcano shows the harmonic tremor glided to higher frequencies, then stopped abruptly just before six eruptions in 2009.
May 13, 2013
Using earthquake sensors to track endangered whales
Oceanographers are using a growing number of seafloor seismometers, devices that record seafloor vibrations, to carry out inexpensive and non-invasive studies of endangered whales.
December 3, 2012
Russian Far East holds seismic hazards that could threaten Pacific Basin
The Kamchatka Peninsula and Kuril Islands, long shrouded in secrecy by the Soviet government, are a seismic and volcanic hotbed with a potential to trigger tsunamis that pose a risk to the rest of the Pacific Basin.
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