Jeffrey J. McGuire Andrew J. Barbour Robert McPherson Mark Hemphill-Haley Kari Stockdale Jay Patton Connie Stewart 20231024 vector digital data https://doi.org/10.5066/P9CNC1BE These data are from a 3-month long deployment of nodal seismometers that ran from December 22th, 2022 until March 1st, 2023 as part of a Distributed Acoustic Sensing (DAS) experiment above the Gorda plate. The deployment was done in response to the 2022/12/20 M6.4 Ferndale earthquake. The sensors were deployed at 46 locations along Old Arcata Rd between Arcata and Eureka California (Figure 1); these locations track the approximate location of the fiber optic cable used as part of the DAS experiment. The instruments have a battery recording life of approximately one month and were swapped out in the same locations in Mid-to-late January, and late February-Early march. Exceptions are that only 29 were deployed for the first month and 3 extra stations were deployed along Samoa blvd in Arcata in the third month. Thus, there are 122 instruments that were deployed at 49 distinct locations. This seimic data was collect along a fiber optic cable that was being used for a distributed acoustic sensing (DAS) experiment. The nodal seismometers provide ground truth recordings of the seismic wavefield for validating the fiber optic strain data. 20221220 20230301 observed Complete None planned Gorda subduction zone -125.0903 -123.7280 40.8138 39.5888 ISO 19115 Topic Category biota earthquake earthquake Cascadia Gorda DAS subduction USGS Metadata Identifier USGS:647a623bd34eac007b5223d4 None Arcata, California None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Jeffrey McGuire USGS Earthquake Science Center Research Geophyicist mailing

345 Middlefield Rd

Menlo Park CA 94035 6503295153 jmcguire@usgs.gov Cal Poly Humboldt University GPS positions were collected with RTK at most sites The data are continuous for the time periods the positions were in the ground 10cm 1m Data has been converted from raw proprietary instrument manufacturer format to miniseed format and corrected to 0db gain 20230310 Winter_2023_Node_Locations_Data_Release.csv Comma Separated Value (CSV) file containing data. Producer Defined Site Producer Defined << empty cell >> No Data Producer defined nan nan GS ScienceBase U.S. Geological Survey mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P9CNC1BE None 20231024 Jeffrey J McGuire U.S. Geological Survey, SOUTHWEST REGION Research Geophysicist mailing address

350 North Akron Road

Moffett Field CA 94035 US 650-439-2553 jmcguire@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata FGDC-STD-001.1-1999