Arcata, California, Distributed Acoustic Sensing (DAS) experiment: 2022 M6.4 Ferndale Aftershock Sequence (ver. 3.0, February 2026)

These data are from a Distributed Acoustic Sensing (DAS) experiment in Arcata, CA, that was conducted jointly by the U.S. Geological Survey, Cal Poly Humboldt University, and Luna Inc. A Luna QuantX DAS interrogator was installed in the Arcata Police Station and connected to a fiber owned by Vero Communications that runs from Arcata to Eureka (Figure 1). The interrogator was installed on December 22nd, 2022, shortly after the December 20th, M6.4 Ferndale earthquake (see https://earthquake.usgs.gov/earthquakes/eventpage/nc73821036). This dataset covers much of the aftershock sequence including several earthquakes with magnitude >= 4, including the M5.4 earthquake on January 1st, 2023 (see https://earthquake.usgs.gov/earthquakes/eventpage/nc73827571). This release covers the time period from December 22nd, 2022 to December 31, 2024.

First release: 2024
Revised: September 2025 (ver. 2.0)
Revised: February 2026 (ver. 3.0)