Tuesday, August 17, 2021

Alaska Comm provides subsea fiber for earthquake monitoring

Alaska Communications is collaborating with the University of Michigan’s Department of Earth and Environmental Sciences to allow earthquake monitoring data to be collected from the ocean floor via the company’s subsea fiber optic cable.

University of Michigan Assistant Professor Ƶack Spica and a graduate student traveled to Alaska Communications’ landing station in Florence, Oregon last week to attach a DAS interrogator (distributed acoustic sensing) to the company’s fiber. The instrument uses a beam of light inside the fiber to analyze seismic activity and report data back to the research team.

“With the Cascadia subduction zone stretching along the pacific northwest coastline along Canada, this is in an ideal location for our team to gather seismic data,” said Spica. “This research project will support continued learning about utilizing fiber for earthquake research, as well as learn how we can use this technology to provide early warning for tsunamis, which are often prompted by earthquakes.”

“With two subsea cables connecting Alaska to the Lower 48, we have substantial infrastructure to aid in research that can help our communities,” said Rick Benken, vice president, network strategy, engineering and operations at Alaska Communications. “We’re excited to support University of Michigan in gaining important insights about earthquakes and tsunamis.”

http://www.AlaskaCommunications.com

NEC's Optical Sensing measures vibrations in fiber cables

NEC has begun commercial sales of a new AI-driven technology that analyzes small vibrations detected with optical fibers.The "NEC Intelligent Optical Fiber Sensing Solution" enables the operator of fiber cables to utilize optical fiber as a sensor. The detected vibrations can be indicative of fiber damage or environmental shaking. In addition to a sensing device attached to one end of the optical fiber, this solution consists of software with a function...

NEC has delivered a submarine cable seismic and tsunami observation system to Taiwan's Central Weather Bureau (CWB) under the Ministry of Transportation and Communications. The new system is mainly intended for observation of earthquakes and tsunami in the area ranging from the offshore coast of Yilan in eastern Taiwan to Fangshan in Pingtung County. The submarine cable measures 620 kilometers and reaches a depth of 5,800 meters. All products,...

Orange and members of the FLY-LION3 consortium (Lower Indian Ocean Network) - the Société Réunionnaise du Radiotéléphone and Comores Câbles - will provide connectivity for the Mayotte volcano and earthquake monitoring network, which is administered by the Institut de Physique du Globe de Paris (IPGP). Using a pair of optical fibres, IPG will experiment with a new technique to listen to the region’s seismic activity. The scientists involved hope...