The Earth’s Metal Heart Daniel A. Frost
TheEarth’sMetalHeart
DanielA.Frost
Whatwethinkweknow
[Bullen,1975]
TheSolidEarth
[EdGarnero]
Drillingdown
Hintsfromastronomy
Iron
Rock
Iron
EmilWeichert
Seeingwithseismology
[MikeThorne,UoU]
Seeingwithseismology
[Redfern]
Seeingtheshadow
RichardOldham
98°
Seeingtheshadow
98° 10°or1000km
RichardOldham
Seeingtheshadow
98°
P-waveShadowZone
RichardOldham
Outtheotherside
145°
P-waveShadow
BenoGutenberg
Laptopseismology
145°
hNps://ds.iris.edu/wilber3/find_event
Laptopseismology
145°
hNps://ds.iris.edu/wilber3/find_event
ShadowZone
PKP
P-wave
Solidorliquid?
145°[MITEAPS]
P-waveShadow
S-waveShadow
HaroldJeffreys
Howhotisthecore?-Very
145°
Hiddeninplainsight
IngeLehmann
Hiddeninplainsight
ShadowZone
PKP
P-wave
PʹIngeLehmann
Hiddeninplainsight
ShadowZone
PKP
P-wave
PʹIngeLehmann
Underpressure
[LyndonStateCollege]
FrancisBirchKeithBullen
Solid!
Solidevidence
[HarvardSeismology]
Solidevidence
[HarvardSeismology]
Normalmode/Freeoscilla>on
Insideout
[AllenMcNamara]
Heatfrominnercore
NorthPoleWilliamGilbert
EdmondHalley
FeelingtheaNrac]on
SouthPoleSouthPole
FeelingtheaNrac]onNorthPole
WilliamGilbert
EdmondHalley
SouthPoleSouthPole
Makingmagne]sm
WalterElsasser
Mo>onofconductorinmagne>cfield
Currentinconductor
Magne>cfield
NorthPole
SouthPoleSouthPole
CorecrystalsNorthPole
SouthPoleSouthPole
CorecrystalsNorthPole
Hexagonallyclose-packed
SouthPoleSouthPole
Ironatoms
CorecrystalsNorthPole (Sandwichesareanisotropic)
SouthPoleSouthPole
Hexagonallyclose-packed
FromtheboNomtothetop
[AndrewJackson]
Magne>cfieldstrength
Thecore’scoat
Magne>cfieldstrength
Thecore’scoat
Magne>cfieldstrength
Coreques]ons
Howdoestheinnercoregrow?Howdoestheinnercoreaffectthegeodynamo?Howdoesthesurfaceaffectthecore?
Thanksforlistening
[AllenMcNamara]
Heatfrominnercore
[MikeThorne,UoU][HarvardSeismology]
[AndrewJackson]
Thanksforlistening