PASSCAL NOMAD Seismic Time Series from Southern New York

Seismic time series data were collected from four sites in southern New York between June 1997 and February 1999. The dataset contains continuous recordings at 20 samples per second and 1 sample per second, deployed by the PASSCAL instrument center. Preliminary analysis focused on shear-wave splitting measurements to study upper mantle anisotropy.

Use Cases

• Analyze shear-wave splitting parameters from the time series to map variations in upper mantle anisotropy over ~50 km scales.
• Correlate seismic anisotropy measurements from sites VASR, WIND, WICK, and SCCC with regional tectonic models.
• Study temporal changes in seismic signals by comparing data from instruments moved to UCON and UHRT in October 1998.
• Investigate core-diffracted shear phases in the time series to infer anisotropy variations near the core-mantle boundary.

Strengths

• Continuous recordings from four distinct sites over a 20-month period from June 1997 to February 1999.
• Data captured at two sampling rates, 20 sps and 1 sps, allowing analysis of different frequency content.

Limitations

• Unknown total row count and file size, limiting assessment of data volume.
• Dataset is temporally stale, with collection ending in February 1999.

Provenance

Source

PASSCAL instrument center, organized by SCIOPS.

Collection Method

Data recorded continuously from STS-2s seismic instruments deployed at field sites.

Time Range

June 1997 to February 1999.

Geography

Four sites in southern New York: VASR, WIND, WICK, SCCC, with later moves to UCON and UHRT.