Identification_Information:

    Citation:

      Citation_Information:

        Originator: Alberta Energy Regulator

        Originator: Alberta Geological Survey

        Originator: Bui, H.

        Publication_Date: 2026

        Title: Seismic Nodal Array Initial Catalogue for the North Peace River Cluster, Peace River Region, Northwestern Alberta (tabular data, tab-delimited format)

        Geospatial_Data_Presentation_Form: tabular digital data

        Series_Information:

          Series_Name: Digital Data

          Issue_Identification: DIG 2026-0015

        Publication_Information:

          Publication_Place: Edmonton, Alberta, Canada

          Publisher: Alberta Geological Survey

        Public_URL: https://ags.aer.ca/publications/all-publications/dig-2026-0015

    Description:

      Abstract: This dataset comprises initial seismic event locations and local magnitudes from three rounds of nodal array deployments between July 2023 and November 2023 in the area north of the town of Peace River, northwestern Alberta. The catalogue includes the unique identification number of the seismic event, event date and time, spatial location (latitude, longitude, and depth), local magnitude, and the number of nodes that record each event.

      Purpose: This work supports the study of the seismic cluster north of the town of Peace River, the North Peace River seismic cluster.

      Supplemental_Information:

    Time_Period_of_Content:

      Time Period Information:

        Single Date/Time:

          Calendar_Date: 20231114

    Currentness_Reference: ground condition

  Status:

    Progress: Complete

    Maintenance_and_Update_Frequency: None planned

  Spatial Domain:

    Bounding Coordinates:

      West_Bounding_Coordinate: -118

      East_Bounding_Coordinate: -116

      North_Bounding_Coordinate: 56.5

      South_Bounding_Coordinate: 55.8

  Keywords:

    Theme:

      Theme_Keyword_Thesaurus: ISO 19115 Topic Category

      Theme_Keyword: catalogues

      Theme_Keyword: earthquakes

      Theme_Keyword: geology

      Theme_Keyword: processing

      Theme_Keyword: seismicity

    Place:

      Place_Keyword_Thesaurus: ISO 19115 Topic Category

      Place_Keyword: alberta

      Place_Keyword: canada

      Place_Keyword: peace river area

  Access_Constraints: Public

  Use_Constraints: Acknowledgement of the Alberta Energy Regulator / Alberta Geological Survey as the originator/source of this information is required as described in the Open Government License - Alberta.

  Point_of_Contact:

    Contact_Information:

      Contact_Organization_Primary:

        Contact_Organization: Alberta Geological Survey

        Contact_Person: AGS Information Manager

      Contact_Position: AGS Information Manager

      Contact_Address:

        Address_Type: mailing and physical

        Address: Alberta Energy Regulator

        Address: 2nd Floor, Twin Atria Building

        Address: 4999-98 Avenue NW

        City: Edmonton

        State_or_Province: Alberta

        Postal_Code: T6B 2X3

        Country: Canada

      Contact_Voice_Telephone: (780) 638-4491

      Contact_Facsimile_Telephone: (780) 422-1459

      Contact_Electronic_Mail_Address: AGS-Info@aer.ca

      Hours_of_Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.

Data_Quality_Information:

  Attribute_Accuracy:

    Attribute_Accuracy_Report: Local magnitudes in the catalogue were calculated from the maximum S-wave amplitude recorded on the horizontal components using the distance-correction model developed by Yenier (2017) for earthquakes in the Western Canada Sedimentary Basin. This method is consistent with the magnitude calculation approach used for regional-array seismicity. Local magnitude estimates may be affected by uncertainties in event locations and seismic phase picks. Despite these uncertainties, magnitude estimates for the same events are generally consistent between the local nodal array data and data from the Regional Alberta Observatory for Earthquake Studies (RAVEN) network.

  Logical_Consistency_Report: The catalogue has been reviewed, and there are no known errors or inconsistencies in the dataset.

  Completeness_Report: This dataset comprises initial seismic event locations and local magnitudes from three rounds of nodal array deployments between July 2023 and November 2023 in the area north of the town of Peace River, northwestern Alberta.

The tabular dataset includes a unique event identification number; the date and time of each seismic event; latitude and longitude (NAD83 datum, decimal degrees); event hypocentre depth (metres relative to sea level); true vertical depth (metres below ground surface); local magnitude; and the total number of nodes (stations) that recorded each event.

Event locations were determined using the NonLinLoc software package (Lomax et al., 2000, 2014). Local magnitudes were calculated using the distance-correction model developed for earthquakes in the Western Canada Sedimentary Basin by Yenier (2017).

References: Lomax, A., Virieux, J., Volant, P. and Berge-Thierry, C. (2000): Probabilistic earthquake location in 3D and layered models: introduction of a Metropolis-Gibbs method and comparison with linear locations; in Advances in seismic event location, C.H. Thurber and N. Rabinowitz (ed.), Modern Approaches in Geophysics, v. 18, Springer, Dordrecht, Netherlands, p. 101–134.

Lomax, A., Michelini, A. and Curtis, A. (2014): Earthquake location, direct, global-search methods; in Encyclopedia of complexity and systems science, R.A. Meyers (ed.), Springer, New York, New York, p. 1–33, doi:10.1007/978-3-642-27737-5_150-2.

Yenier, E. (2017): A local magnitude relation for earthquakes in the Western Canada Sedimentary Basin; Bulletin of the Seismological Society of America, v. 107, no. 3, p. 1421–1431.

  Positional_Accuracy:

    Horizontal_Positional_Accuracy:

   Horizontal_Positional_Accuracy_Report: Event locations in the catalogue were derived from a high-quality dataset of manually reviewed P- and S-wave picks using a one-dimensional (1D) velocity model developed from well log data. Uncertainty in estimated hypocentre locations, particularly depths, may arise from limitations in station coverage, velocity model assumptions, and location algorithms.

    Vertical_Positional_Accuracy:

   Vertical_Positional_Accuracy_Report: The catalogue contains some negative values in both depth fields. The Dpth_SL_m values were generated directly by the NonLinLoc event location algorithm. The Dpth_TVD_m values were derived from the Dpth_SL_m output by adding the estimated average surface elevation to obtain the true vertical depth relative to the ground surface.

Negative depth values were not filtered out and were retained in the catalogue to preserve the original NonLinLoc outputs and keep the catalogue as complete as possible. Users may apply their own filtering criteria, including the removal of negative-depth events, if desired.

  Lineage:

    Process_Step:

   Process_Description: A seismic nodal array was rapidly deployed in three phases between 27 July and 15 November 2023 in the area north of the town of Peace River. The recorded seismic data were processed to detect and locate seismic events in the area. Local magnitudes were estimated for each seismic event, and the final event catalogue was generated in 2025. More details on the processing workflow are available at https://ags.aer.ca/publications/all-publications/ofr-2026-01

   Process_Date: 2025

  Data_Quality_Information:

Spatial_Data_Organization_Information:

Spatial_Reference_Information:

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: DIG 2026-0015

Entity_Type_Definition: This dataset comprises initial seismic event locations and local magnitudes from three rounds of nodal array deployments between July 2023 and November 2023 in the area north of the town of Peace River (North Peace River cluster), northwestern Alberta.

Entity_Type_Definition_Source: Alberta Geological Survey

Attribute:

Attribute_Label: EV_ID

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Unique identification number of the seismic event.

Attribute:

Attribute_Label: EV_date

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Date of the seismic event (UTC).

Attribute:

Attribute_Label: EV_time

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Time of the seismic event (UTC).

Attribute:

Attribute_Label: Lat_NAD83

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Latitude, NAD83 datum, decimal degrees north.

Attribute:

Attribute_Label: Long_NAD83

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Longitude, NAD83 datum, decimal degrees east.

Attribute:

Attribute_Label: Dpth_SL_m

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Event hypocentre depth, in metres, relative to sea level.

Attribute:

Attribute_Label: Dpth_TVD_m

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Event hypocentre true vertical depth, in metres, relative to ground surface.

Attribute:

Attribute_Label: Mag_ML

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Local magnitude of the seismic event.

Attribute:

Attribute_Label: No_nodes

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Total number of nodes (stations) that recorded the seismic event.

Attribute:

Attribute_Label: Publisher

Attribute_Definition_Source: Alberta Geological Survey

Attribute_Definition: Organization that published the dataset.

  Distribution_Information:

    Distributor:

      Contact_Information:

        Contact_Organization_Primary:

          Contact_Organization: Alberta Geological Survey

          Contact_Person: AGS Information Manager

        Contact_Position: AGS Information Manager

        Contact_Address:

          Address_Type: mailing and physical

          Address: Alberta Energy Regulator

          Address: 2nd Floor, Twin Atria Building

          Address: 4999-98 Avenue NW

          City: Edmonton

          State_or_Province: Alberta

          Postal_Code: T6B 2X3

          Country: Canada

        Contact_Voice_Telephone: (780) 638-4491

        Contact_Facsimile_Telephone: (780) 422-1459

        Contact_Electronic_Mail_Address: AGS-Info@aer.ca

        Hours_of_Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.

Distribution_Liability: The Alberta Energy Regulator / Alberta Geological Survey (AER/AGS) licenses this information under the Open Government License - Alberta. Any references to proprietary software in our documentation, and/or any use of proprietary data formats in our releases, do not constitute endorsement by the AER/AGS of any manufacturer's product.

  Metadata_Reference_Information:

    Metadata_Date: 20261002

    Metadata_Contact:

      Contact_Information:

        Contact_Organization_Primary:

          Contact_Organization: Alberta Geological Survey

          Contact_Person: AGS Information Manager

        Contact_Position: AGS Information Manager

        Contact_Address:

          Address_Type: mailing and physical

          Address: Alberta Energy Regulator

          Address: 2nd Floor, Twin Atria Building

          Address: 4999-98 Avenue NW

          City: Edmonton

          State_or_Province: Alberta

          Postal_Code: T6B 2X3

          Country: Canada

        Contact_Voice_Telephone: (780) 638-4491

        Contact_Facsimile_Telephone: (780) 422-1459

        Contact_Electronic_Mail_Address: AGS-Info@aer.ca

        Hours_of_Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.

    Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

    Metadata_Standard_Version: FGDC-STD-001-1998

    Metadata_Time_Convention: local time

    Metadata_Access_Constraints: none

    Metadata_Use_Constraints: none