About: http://webisa.webdatacommons.org/373387113

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Because they are low frequency and last for relatively long periods of time, they can be distinguished from earthquakes and other events such as underground nuclear blasts.
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org