Item talk:Q66126

{"@context": "https://schema.org", "@type": "CreativeWork", "additionalType": "USGS Numbered Series", "name": "Broadband characteristics of earthquakes recorded during a dome-building eruption at Mount St. Helens, Washington, between October 2004 and May 2005", "identifier": [{"@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "pp17505", "url": "https://pubs.usgs.gov/publication/pp17505"}, {"@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 70047344}, {"@type": "PropertyValue", "propertyID": "DOI", "value": "10.3133/pp17505", "url": "https://doi.org/10.3133/pp17505"}], "inLanguage": "en", "isPartOf": [{"@type": "CreativeWorkSeries", "name": "Professional Paper"}], "datePublished": "2008", "dateModified": "2019-05-31", "abstract": "From October 2004 to May 2005, the Center for Earthquake Research and Information of the University of Memphis \noperated two to six broadband seismometers within 5 to 20 \nkm of Mount St. Helens to help monitor recent seismic and \nvolcanic activity. Approximately 57,000 earthquakes identified during the 7-month deployment had a normal magnitude \ndistribution with a mean magnitude of 1.78 and a standard \ndeviation of 0.24 magnitude units. Both the mode and range \nof earthquake magnitude and the rate of activity varied during \nthe deployment. We examined the time domain and spectral \ncharacteristics of two classes of events seen during dome \nbuilding. These include volcano-tectonic earthquakes and \nlower-frequency events. Lower-frequency events are further \nclassified into hybrid earthquakes, low-frequency earthquakes, \nand long-duration volcanic tremor. Hybrid and low-frequency \nearthquakes showed a continuum of characteristics that varied \nsystematically with time. A progressive loss of high-frequency \nseismic energy occurred in earthquakes as magma approached \nand eventually reached the surface. The spectral shape of large \nand small earthquakes occurring within days of each other did \nnot vary with magnitude. Volcanic tremor events and lower-frequency earthquakes displayed consistent spectral peaks, \nalthough higher frequencies were more favorably excited during tremor than earthquakes.", "description": "14 p.", "publisher": {"@type": "Organization", "name": "U.S. Geological Survey"}, "editor": [{"@type": "Person", "name": "Sherrod, David R. dsherrod@usgs.gov", "givenName": "David R.", "familyName": "Sherrod", "email": "dsherrod@usgs.gov", "identifier": {"@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0001-9460-0434", "url": "https://orcid.org/0000-0001-9460-0434"}, "affiliation": [{"@type": "Organization", "name": "Volcano Science Center", "url": "https://www.usgs.gov/centers/volcano-science-center"}]}, {"@type": "Person", "name": "Stauffer, Peter H. pstauffe@usgs.gov", "givenName": "Peter H.", "familyName": "Stauffer", "email": "pstauffe@usgs.gov"}, {"@type": "Person", "name": "Scott, William E. wescott@usgs.gov", "givenName": "William E.", "familyName": "Scott", "email": "wescott@usgs.gov", "identifier": {"@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0001-8156-979X", "url": "https://orcid.org/0000-0001-8156-979X"}, "affiliation": [{"@type": "Organization", "name": "Volcano Science Center", "url": "https://www.usgs.gov/centers/volcano-science-center"}]}], "author": [{"@type": "Person", "name": "Moran, Seth C. smoran@usgs.gov", "givenName": "Seth C.", "familyName": "Moran", "email": "smoran@usgs.gov", "identifier": {"@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0001-7308-9649", "url": "https://orcid.org/0000-0001-7308-9649"}, "affiliation": [{"@type": "Organization", "name": "Volcano Hazards Program", "url": "https://www.usgs.gov/programs/VHP"}, {"@type": "Organization", "name": "Volcano Science Center", "url": "https://www.usgs.gov/centers/volcano-science-center"}]}, {"@type": "Person", "name": "Norris, Robert D.", "givenName": "Robert D.", "familyName": "Norris"}, {"@type": "Person", "name": "Horton, Stephen P.", "givenName": "Stephen P.", "familyName": "Horton"}], "funder": [{"@type": "Organization", "name": "Volcano Hazards Program", "url": "https://www.usgs.gov/programs/VHP"}], "spatialCoverage": [{"@type": "Place", "additionalType": "country", "name": "United States", "url": "https://geonames.org/6252001"}, {"@type": "Place", "additionalType": "state", "name": "Washington", "url": "https://geonames.org/5815135"}, {"@type": "Place", "additionalType": "unknown", "name": "Mount St. Helens"}, {"@type": "Place", "geo": [{"@type": "GeoShape", "additionalProperty": {"@type": "PropertyValue", "name": "GeoJSON", "value": {"type": "FeatureCollection", "features": [{"type": "Feature", "properties": {}, "geometry": {"type": "Polygon", "coordinates": [[[-122.238678, 46.161175], [-122.238678, 46.233792], [-122.131489, 46.233792], [-122.131489, 46.161175], [-122.238678, 46.161175]]]}}]}}}, {"@type": "GeoCoordinates", "latitude": 46.197483500000004, "longitude": -122.18508349999999}]}]}