Portable Instrument Data for 2,345 Aftershocks Following the 1992 Landers Earthquake

2345 aftershocks recorded by a portable instrument array deployed by the Southern California Earthquake Center (SCEC) institutions following the June 28, 1992 Landers and Big Bear earthquakes. The data were collected by a collaboration including Caltech, San Diego State University, and several University of California campuses. Recordings cover specific periods between June 30 and August 18, 1992, with data also available for the main Landers earthquake.

Use Cases

• Analyze aftershock sequences and decay rates based on the catalog of 2,345 events.
• Model ground motion and seismic wave propagation using portable instrument recordings.
• Study fault mechanics and stress transfer following a major earthquake based on the spatial and temporal coverage.
• Validate seismic network detection algorithms using the multi-station recordings from the portable array.

Strengths

• Covers 2,345 specific aftershock events, providing a substantial event catalog.
• Data recorded at 5 or more stations per event, offering spatial coverage for analysis.
• Covers a defined temporal sequence with specific date ranges provided in the description.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Southern California Earthquake Center (SCEC) Data Center.

Collection Method

Data collected by a portable instrument array deployed and maintained by SCEC institutions (Caltech, San Diego State University, UC Santa Barbara, UC San Diego, USC).

Time Range

June 30, 1992 - August 18, 1992, with specific gaps and data for the June 28, 1992 mainshock.

Freshness

Data is historical, covering 1992. Last update date is unknown.

Geography

Southern California, specifically the region affected by the 1992 Landers and Big Bear earthquakes.