<http://webisa.webdatacommons.org/413935022>	<http://www.w3.org/ns/prov#value>	"intensity, k is an absorption coefficient and x is the distance traveled" .
<http://webisa.webdatacommons.org/413935022>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<usgs.gov> .
<http://webisa.webdatacommons.org/prov/507604919>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/413935022> .
<http://webisa.webdatacommons.org/413935022>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/516207158>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/413935022> .