Science, Space and Technology News 2024
Recent research has revealed that splay faults, linked to subduction zones, can trigger rapid tsunamis and significant ecological changes by causing greater land uplift during earthquakes. These findings, based on geological records from Montague Island, emphasize the enhanced risks at various global subduction zones and the need for improved hazard awareness. Credit: SciTechDaily.com
“This is the first study to employ coastal geology to reconstruct the rupture history of the splay fault system,” said Jessica DePaolis, postdoctoral fellow in Virginia Tech’s Department of Geosciences. “These splay faults are closer to the coast, so these tsunamis will be faster to hit the coastline than a tsunami generated only from a subduction zone earthquake.”
Fortunately, secondary, or surface level, effects of these shifts have been geologically recorded on Montague Island in Prince William Sound in Alaska, making it the only current land mass to sit atop a splay fault to exhibit such effects in its soil. “There are definitely islands that uplift with subduction zone earthquakes, but they don’t necessarily have faults going through them causing that exaggerated uplift, so it’s a really unique place,” said Dura, an affiliated faculty member of the Global Change Center and the Fralin Life Sciences Institute.
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