High-resolution seismic imaging data acquired in 2021 across a trace of the San Andreas Fault at Mee Ranch, Monterey County, California
In April of 2021, the U.S. Geological Survey conducted a high-resolution seismic survey at Mee Ranch in Monterey County, California. Both passive- and active-source seismic data were acquired using DTCC SmartSolo 3-component nodal seismograph systems ("nodes"), which continuously recorded data at rates up to 2000 samples per second. For passive-source acquisition, a 6x5 grid of nodes was deployed for several weeks before and during the active source shooting. For active-source acquisition, 395 nodes were deployed 1 meter apart (2 meters apart near the endpoints) along a southwest-northeast trend to create an approximately 500-m-long linear array. Additional nodes were deployed at 1 or 2 meter spacing along 25- and 50-m-long linear arrays centered about a known section of the fault. P-wave data were generated near each recording station of the main linear array using a Betsy seisgun firing an 8-gauge blank shotgun shell. P-wave data were also generated every 20 stations along the main linear array using approximately one/third pound of buried explosives. Fault-zone-guided-wave data were generated using explosive sources that were placed within a mapped trace of the San Andreas Fault zone and close to the shorter linear arrays. Finally, S-wave data were generated at each station using an aluminum block struck by a sledgehammer. Shot gathers were created in SEG-Y format (Barry et al, 1975) by extracting several seconds of data from each node for each recorded shot time. The passive grid data were converted to gain-corrected miniseed day files (Ahern and Dost, 2012). This report provides the metadata needed to analyze the seismic data.
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[ "010:12" ] |
| contactPoint |
{ "fn": "Mark R Goldman", "@type": "vcard:Contact", "hasEmail": "mailto:goldman@usgs.gov" } |
| description | In April of 2021, the U.S. Geological Survey conducted a high-resolution seismic survey at Mee Ranch in Monterey County, California. Both passive- and active-source seismic data were acquired using DTCC SmartSolo 3-component nodal seismograph systems ("nodes"), which continuously recorded data at rates up to 2000 samples per second. For passive-source acquisition, a 6x5 grid of nodes was deployed for several weeks before and during the active source shooting. For active-source acquisition, 395 nodes were deployed 1 meter apart (2 meters apart near the endpoints) along a southwest-northeast trend to create an approximately 500-m-long linear array. Additional nodes were deployed at 1 or 2 meter spacing along 25- and 50-m-long linear arrays centered about a known section of the fault. P-wave data were generated near each recording station of the main linear array using a Betsy seisgun firing an 8-gauge blank shotgun shell. P-wave data were also generated every 20 stations along the main linear array using approximately one/third pound of buried explosives. Fault-zone-guided-wave data were generated using explosive sources that were placed within a mapped trace of the San Andreas Fault zone and close to the shorter linear arrays. Finally, S-wave data were generated at each station using an aluminum block struck by a sledgehammer. Shot gathers were created in SEG-Y format (Barry et al, 1975) by extracting several seconds of data from each node for each recorded shot time. The passive grid data were converted to gain-corrected miniseed day files (Ahern and Dost, 2012). This report provides the metadata needed to analyze the seismic data. |
| distribution |
[ { "@type": "dcat:Distribution", "title": "Digital Data", "format": "XML", "accessURL": "https://doi.org/10.5066/P9K7QLDL", "mediaType": "application/http", "description": "Landing page for access to the data" }, { "@type": "dcat:Distribution", "title": "Original Metadata", "format": "XML", "mediaType": "text/xml", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.6323af07d34e71c6d67accf8.xml" } ] |
| identifier | http://datainventory.doi.gov/id/dataset/USGS_6323af07d34e71c6d67accf8 |
| keyword |
[ "USGS:6323af07d34e71c6d67accf8", "earthquakes", "faulting (geologic)", "hazards", "seismic methods", "seismic reflection methods", "seismic refraction methods", "seismology" ] |
| modified | 2023-09-26T00:00:00Z |
| publisher |
{ "name": "U.S. Geological Survey", "@type": "org:Organization" } |
| spatial | -120.77000, 36.17000, -120.75000, 36.19000 |
| theme |
[ "geospatial" ] |
| title | High-resolution seismic imaging data acquired in 2021 across a trace of the San Andreas Fault at Mee Ranch, Monterey County, California |
