An electromagnetic sensor on its way to the ocean floor off New Zealand to collect data. Credit: Samer Naif / Lamont-Doherty Electromagnetic Geophysics Lab Seamounts offer clue to solving a tectonic puzzle. The Hikurangi Margin, located off the east coast of the North Island of New Zealand, is where the […]

Imperfections such as the inclusions (dark flecks) in this diamond reveal that tectonic slabs can carry water deep into Earth’s mantle. EVAN SMITH/© 2021 GIA Earthquakes shouldn’t occur more than 300 kilometers below Earth’s surface, according to most geophysical models. Yet they commonly do—a phenomenon that has mystified seismologists for […]

A team from the UW-based Pacific Northwest Seismic Network installs a new solar panel array at a seismic monitoring site in Enumclaw, Washington, on April 20, 2021. The seismometer, one of hundreds that provide data for ShakeAlert, is in the hole in the foreground. A trench brings cables to the […]

Credit: Unsplash/CC0 Public Domain These mysterious earthquakes originate between 400 and 700 kilometers below the surface of the Earth and have been recorded with magnitudes up to 8.3 on the Richter scale. Xanthippi Markenscoff, a distinguished professor in the Department of Mechanical and Aerospace Engineering at the UC San Diego […]

Vivien He with her earthquake early warning device in her makeshift soldering room converted from a bathroom. Credit: Vivien He A Southern California high school junior has built a low-cost seismometer device that delivers earthquake early warnings for homes and businesses. Costing less than $100 for her to make today, […]

March 16 – 21, 2021 In an eruption not far from Reykjavik, lava poured from spatter cones along a new fissure on Reykjanes peninsula. Swarms of small earthquakes in February 2021 on Iceland’s Reykjanes peninsula had experts warning that magma was moving beneath Geldingadalur valley and could soon erupt. Late on March […]

Glaciers such as the Yakutat in Southeast Alaska, shown here, have been melting since the end of the Little Ice Age, influencing earthquakes in the region. Credit: Photo by Sam Herreid In 1958, a magnitude 7.8 earthquake triggered a rockslide into Southeast Alaska’s Lituya Bay, creating a tsunami that ran […]

Residents have been ‘waking up to earthquakes’ every day for more than a week. Iceland’s Reykjanes peninsula has been shaken by more than 20,000 earthquakes this week. Scientists expect an imminent volcanic eruption. (Image credit: Getty Images) More than 20,000 earthquakes have shaken southern Iceland this week, rattling the capital city of […]

Field crew downloading data from a continuously operating Global Positioning station in the Sierra Negra caldera, Galapagos Islands, Ecuador. Credit: Keith Williams (UMAVCO, Inc) Hours before the 2018 eruption of Sierra Negra, the Galápagos Islands’ largest volcano, an earthquake rumbled and raised the ground more than 6 feet in an […]

3D view of one especially complex multi-fault rupture from the synthetic earthquake catalog developed by the Southern California Earthquake Center using a new earthquake modeling framework. Credit: Kevin Milner, University of Southern California Massive earthquakes are, fortunately, rare events. But that scarcity of information blinds us in some ways to […]