About: http://webisa.webdatacommons.org/92735562

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	It varies both temporally and spatially for various reasons, including inhomogeneity of rocks and interaction between charged particles from the Sun and the magnetosphere.The earth's magnetic field is relatively weak.
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org