OptaSense will have two presentations at the AGU (American Geophysical Union) Fall Meeting in New Orleans, Louisiana, December 13-17, 2021.
On Tuesday, December 14, at 4 PM CST, Martin Karrenbach will present an online poster session “Earthquake Detection and Location with Long-Range DAS Systems,” where OptaSense’s QuantX interrogator was used to support a sensing array 100 kilometers in length with a channel spacing of 10 meters in the Long Valley caldera near Mammoth Lakes, California. The system recorded regional and local earthquakes with unprecedented detail, including several small events that were missed by the USGS seismic network.
On Wednesday, December 15, at 10 AM CST, Steve Cole will present a talk, “Time-Lapse Passive Monitoring of an Active Landslide Using Surface Waves”. Ambient seismic noise is analyzed to measure near surface velocities and show changes over time related to rainfall and landslide activity. This presentation is a further application of DAS to monitoring active landslides, as recently discussed in our whitepaper Strain & Temperature Monitoring Using Rayleigh Backscatter Sensing For Geological Applications.