Homestead Valley Earthquake Aftershock Phase and Hypocenter Data

March 1979 aftershocks from four moderate earthquakes in the Mojave Desert. Phase data from portable seismographs deployed by the U.S. Geological Survey were merged with Southern California Seismic Network recordings. The dataset was compiled by the Southern California Earthquake Center and published in a USGS Open File Report.

Use Cases

• Relocate earthquake hypocenters using portable instrument phase data (homestead.phase) and a specified velocity model (lnv8z0.mod).
• Analyze aftershock spatial distribution by mapping relocated hypocenters (homestead.hyp) against portable instrument locations (homestead.sta).
• Compare seismic event recordings from the Southern California Seismic Network with portable instrument data (hvnetandport.dat).

Strengths

• Includes phase data from portable instruments deployed specifically for the aftershock sequence.
• Data integrates recordings from the regional Southern California Seismic Network.
• Relocations were performed using a documented velocity model.

Limitations

• Dataset is limited to a single aftershock sequence from March 1979, providing a narrow temporal snapshot.
• Specific row counts, file sizes, and detailed column definitions are unavailable.
• Data format (hypoinverse) requires specialized seismological software for processing.

Provenance

Source

Southern California Earthquake Center Data Center.

Collection Method

Phase data from portable seismographs merged with Southern California Seismic Network recordings.

Time Range

March 1979.

Freshness

null

Geography

Homestead Valley area, Mojave Desert, California.