Page 26: of Marine Technology Magazine (January 2026)

FEATURE AUSTRALIAN BUOYS

Above: GNSS-A equipped Wave Glider midships, loaded aboard the R/V North Wind in Eureka, CA, and surrounded by three sea? oor geodetic benchmarks to be deployed along the Cascadia Subduction Zone.

Right: Topo-bathymetry map of the Cascadia subduction zone showing geodetic velocities on land and offshore USGS and NSF sea? oor geodetic sites.

m horizontally in a shallow part of the fault, less than 20

Critical insights from the Aleutian subduction zone

One of the tectonic sources of large earthquakes that USGS km below the seabed, helping us to understand how stress has been monitoring is the Aleutian Subduction Zone. It was builds up along the fault and is released in an earthquake,” he here that the Chignik earthquake struck – and USGS was says. “These results suggested that the cumulative slip had ready for a post-earthquake response mission. relieved stress on the shallow portion of the fault and there-

Just a couple of years before, three GNSS-A monitoring sites fore, the Chignik earthquake likely did not increase tsunami had been set up on the sea