💧🌏 Greg CocksJun 5
Magnetic Storms And Geoelectric Hazards
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https://doi.org/10.1146/annurev-earth-032524-012356 <-- shared paper / annual review
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#magneticstorm #electromagneticinduction #extremeevent #historicalevent #hazardanalysis #spaceweather #history #Carrington #geoelectric #humanimpacts #risk #hazard #monitoring #network #geology #geomagnetism #impedance #rock #soil #utilities #electricaltransmission #powerlines #magnetotelluric #sensor #magnetometer #blackout #brownout #energy #geoelectrichazard #geoelectric #geostatics #GIS #spatial #mapping #spatialanalysis #spatiotemporal #model #modeling #geomagnetism #geomagneticstorm #telecommunication #electronics #hardened #geography #mitigation #preparedness #geomorphology #geomorphometry #surfacegeology #cost #economics #disaster #impacts #technology #InternetOfThings #internet #USA #review #CONUS #numericalmodeling #realtimemonitoring
KillBait NewsJun 1

Scientists Investigate a Reversal in a Large Flow Region of Earth's Outer Core Detected in 2010

📰 Original title: Something Made Earth's Molten Core Reverse Direction In 2010

🤖 IA: It's clickbait ⚠️
👥 Users: It's clickbait ⚠️

View full AI summary https://en.killbait.com/scientists-investigate-a-reversal-in-a-large-flow-region-of-earth-s-outer-core-detected-in-2010.html?utm_source=mastodon_world&utm_medium=social&utm_campaign=killbait.mastodon_world

#geology #earthcore #geomagnetism #ge...

Scientists Investigate a Reversal in a Large Flow Region of Earth's Outer Core Detected in 2010

Researchers analyzing satellite measurements of Earth's magnetic field have identified an unusual event that occurred in 2010 within Earth's outer core. According to the study, a large region of molten iron located deep beneath the Pacific Ocean changed its movement and began flowing eastward, opposite to the prevailing westward motion typically observed in that part of the core. The outer core is composed of electrically conductive liquid metal whose motion generates Earth's magnetic field through complex geophysical processes. This magnetic field plays a critical role in protecting the planet by shielding the atmosphere from solar wind and reducing exposure to harmful cosmic radiation. Scientists describe the observed feature as a large wave-like structure, suggesting that a substantial volume of molten material shifted direction over a relatively short period. The discovery indicates that Earth's interior may be more dynamic and variable than previously understood. While researchers have documented the phenomenon using magnetic-field observations, the precise cause remains unknown. The event has prompted further investigation into the mechanisms that can influence large-scale flows within the outer core. Understanding these processes is important because changes in core dynamics can affect the behavior of Earth's magnetic field over time. The findings contribute to ongoing efforts to better understand the structure, motion, and evolution of Earth's deep interior, highlighting that significant and unexpected changes can occur far beneath the planet's surface.

KillBait
KillBaitJun 1

Scientists Investigate a Reversal in a Large Flow Region of Earth's Outer Core Detected in 2010

📰 Original title: Something Made Earth's Molten Core Reverse Direction In 2010

🤖 IA: It's clickbait ⚠️
👥 Users: It's clickbait ⚠️

View full AI summary https://en.killbait.com/scientists-investigate-a-reversal-in-a-large-flow-region-of-earth-s-outer-core-detected-in-2010.html?utm_source=mastodon_social&utm_medium=social&utm_campaign=killbait.mastodon_social

#geology #earthcore #geomagnetism #...

Scientists Investigate a Reversal in a Large Flow Region of Earth's Outer Core Detected in 2010

Researchers analyzing satellite measurements of Earth's magnetic field have identified an unusual event that occurred in 2010 within Earth's outer core. According to the study, a large region of molten iron located deep beneath the Pacific Ocean changed its movement and began flowing eastward, opposite to the prevailing westward motion typically observed in that part of the core. The outer core is composed of electrically conductive liquid metal whose motion generates Earth's magnetic field through complex geophysical processes. This magnetic field plays a critical role in protecting the planet by shielding the atmosphere from solar wind and reducing exposure to harmful cosmic radiation. Scientists describe the observed feature as a large wave-like structure, suggesting that a substantial volume of molten material shifted direction over a relatively short period. The discovery indicates that Earth's interior may be more dynamic and variable than previously understood. While researchers have documented the phenomenon using magnetic-field observations, the precise cause remains unknown. The event has prompted further investigation into the mechanisms that can influence large-scale flows within the outer core. Understanding these processes is important because changes in core dynamics can affect the behavior of Earth's magnetic field over time. The findings contribute to ongoing efforts to better understand the structure, motion, and evolution of Earth's deep interior, highlighting that significant and unexpected changes can occur far beneath the planet's surface.

KillBait
Show threadearthlingMay 25

@coreyspowell
10/
In short: It’s not an apocalypse; it’s a data corrective. It proves that the engine room of our planet is a highly active, rapidly changing environment, and it took a constellation of advanced satellites sixteen years of data-crunching to finally reveal what happened right under our feet.

#Geophysics
#Geomagnetism
#EarthsCore
#Geodynamics
#OuterCore
#Geodynamo
#ESASwarm
#CryoSat
#SatelliteData
#EarthObservation
#GeomagneticField
#WorldMagneticModel
#WMM

Show threadearthlingMay 25

@coreyspowell
9/
The consequence: This study provides a practical reality check. It proves that localized, dramatic "sloshing" and regional flow reversals happen relatively frequently in the outer core as part of the earth's natural, healthy dynamic loop, without triggering a catastrophic planetary collapse.

#Geophysics
#Geomagnetism
#EarthsCore

Show threadearthlingMay 25

@coreyspowell
8/
4. Reassuring News on a "Magnetic Flip"

Whenever the words "core reversal" hit the news, it tends to trigger apocalyptic sci-fi anxieties about a total geomagnetic pole reversal (which would weaken our radiation shield and disrupt global satellite grids).

#Geophysics
#Geomagnetism
#EarthsCore

Show threadearthlingMay 25

@coreyspowell
7/
The consequence: This specific 2010 reversal closely aligns with independent seismic observations showing changes in the behavior of the solid inner core. Tracking these massive shifts helps scientists map out exactly how the deep interior exchanges energy with the crust, directly affecting the literal spin speed of the planet.

#Geophysics
#Geomagnetism
#EarthsCore

Show threadearthlingMay 25

@coreyspowell
6/
3. Clues Into the "Length of Day" Mystery

Earth's rotation isn't perfectly consistent; the length of a day micro-fluctuates over roughly 6-year cycles. Because the mantle and the core are gravitationally and electromagnetically coupled, when massive volumes of molten iron change speed or direction, it changes the planet's angular momentum.

#Geophysics
#Geomagnetism
#EarthsCore
#WMM

Show threadearthlingMay 25

@coreyspowell
5/
The consequence: When the core shifts, the WMM drifts out of accuracy faster than expected. High-precision satellite data from missions like Swarm are practically used to issue emergency or accelerated updates to these navigation models so global GPS and autopilot systems don't suffer tracking errors.

#Geophysics
#Geomagnetism
#EarthsCore
#WMM
#GPS

Show threadearthlingMay 25

@coreyspowell
4/
2. Refining Global Navigation Models (WMM)

While a regional flow reversal doesn't flip the whole planet's magnetic field, it does alter the localized shape and strength of the geomagnetic field above the Pacific. Tech infrastructure relies heavily on the World Magnetic Model (WMM)—the digital map embedded in every smartphone, airplane navigation system, and military defense radar to translate "magnetic north" into "true north."

#Geophysics
#Geomagnetism
#EarthsCore
#WMM