Seismic Events in an Industrial Corridor of the Chicago Area

Dataset of 1262 seismic events recorded by seismic station NW.HQIL (Chicago area) between June 2017 and June 2019. Events were detected by a PSD misfit detector applied to overlapping (50%) 10-s windows of HQIL waveforms. Detected events were then clustered using a k-means clustering model. The clustering results were used to create this labeled datset. Dataset .zip file contains miniSEED files of 3-component, 20-s seismograms of each labeled event (10 seconds before and after event onset). Metadata CSV file contains the atrributes listed in the following table: Attribute Description ID Event ID type Event type (A-D). A: Long-duration (> 10 s) man-made noise, dominated by 11 Hz energy (characteristic of 8-pole motors). Potential source: operation of industrial machinery (e.g. conveyor belt with an 8-pole motor) B: Transitional signals (Turning ON signals) with similar waveform and spectral features as Type A events. Potential source: Turning ON of Type A machinery. C: High-amplitude, short-duration (< 10 s) blasts, dominated by high frequency energy (> 30 Hz). Potential source: Surface blasts at the nearest quarry (< 1 km from HQIL) D: Low-amplitude blast-like events of mixed sources. Potential sources: Quarry blasts with source distances > 1 km from station HQIL (D1), underground explosions at the nearest quarry (D2), wind interaction with local structures (D3) subtype Event subtype. Only applicable for Type D events. window_starttime_utc Start time (in UTC) of 10-s window that was detected by the PSD detector. Event onsets may not always coincide with the window start time onset_time_utc Start time (in UTC) of event onset. For Type A events, this attribute is not applicable and is equal to window_starttime_utc uncertainty_onset_s Uncertainty (in seconds) of manually-picked event onset. Not applicable for Type A events. potential_source Potential source of event.