![]() ![]() The University of Texas Institute for Geophysics is a research unit of the Jackson School of Geosciences. The research and seismic survey were funded by the National Science Foundation and similar scientific agencies in New Zealand, the United Kingdom and Japan. The new findings reveal how those conditions sometimes come about and importantly, said Bangs, tell scientists what to look for at the world's other subduction zones. Scientists believe that the make-up of the crust is a major factor in how tectonic energy is released, with softer, wetter rocks allowing plates to slip slowly, while drier, brittle rocks store energy until they fail in violent and deadly megaquakes. Slow slip earthquakes are slow motion versions of large earthquakes, releasing similar levels of pent-up tectonic energy but in a harmless creeping fashion that can take days or weeks to unfold. Pacific Northwest) that have subducting seamounts and a lot of sediment, but because the subducting crust there typically has less water than Hikurangi, they may be less likely to have the same kind of shallow slow slip activity." Earthquake - Magnitude 6.4 - GULF OF CALIFORNIA - 2023 June 18, 20:30:25 UTC earthquakes today - recent and latest earthquakes, earthquake map and earthquake information. "There could be other places like Cascadia (in the U.S. "That older one seems to be very much linked to an uplifted ridge that's really in the bullseye of where recent slow slip activity has been," Bangs said. In another surprise, the scientists spotted the fading trail of a much larger seamount that had long since sunk beneath New Zealand's North Island.Īccording to Bangs, the discovery suggests that sinking seamounts drag down enough water-rich sediment to create conditions in the crust suitable for slow slip earthquakes, at least in New Zealand. Previous models suggested sediments are pushed down the subduction zone ahead of the seamount, but the scan revealed something different: a massive sediment trail in Pāpaku's wake. Images from the scan show the seamount colliding with the subduction zone and the pattern of stresses, fluids and sediments surrounding it. ![]() Known as the Pāpaku Seamount, the long extinct volcano lies some three miles under the seafloor inside the Hikurangi subduction zone off the coast of New Zealand. In 2018, Bangs led an ocean seismic survey that resulted in the first ever 3D scan of a large subducting seamount. This interactive tool allows you to view a list and map of earthquakes and to fine-tune the display with various settings. and magnitude 4.5+ earthquakes around the world. The research was led by Nathan Bangs, a senior research scientist at the University of Texas Institute for Geophysics. The Latest Earthquake web application displays information in real-time and near-real-time for magnitude 2.5+ earthquakes in the U.S. The findings, published June 7, 2023, in the journal Nature Geoscience, can be used to adjust earthquake models and help scientists unravel the mechanisms that drive earthquakes. ![]()
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