Geomagnetism articles within Nature Geoscience

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  • Research Briefing |

    Water that has been carried deep into the Earth by oceanic plates in subduction zones, can influence earthquakes and volcanic eruptions. Three-dimensional images of electrical resistivity derived from electromagnetic geophysical data provide new constraints on the distribution, transport, and storage of water in the Cascadia subduction zone.

  • Editorial |

    The first marsquakes detected by NASA’s InSight mission mark just the start of seismology on Mars. Both Earth and planetary scientists alike should embrace this new frontier of geophysics.

  • Perspective |

    Geophysical and meteorological measurements by NASA’s InSight lander on Mars reveal a planet that is seismically active and provide information about the interior, surface and atmospheric workings of Mars.

    • W. Bruce Banerdt
    • , Suzanne E. Smrekar
    •  & Mark Wieczorek

  • Article |

    The magnetic field measured by the InSight lander on Mars varies daily and is ten times stronger than expected. The field is inferred to originate from components of basement rocks magnetized by an ancient dynamo of Earth-like strength.

    • Catherine L. Johnson
    • , Anna Mittelholz
    •  & William B. Banerdt

  • Editorial |

    Hidden under many kilometres of silicate mantle material, the cores of Earth and other planets are hard to investigate. The Psyche spacecraft, designed to visit a metal body that may be a core stripped of its mantle, could bring a close-up view.

  • Article |

    Satellite observations have detected localized magnetic field changes at high latitudes. Simulations suggest these changes can be explained by a westward jet in the liquid core, which has been accelerating over the past 15 years.

    • Philip W. Livermore
    • , Rainer Hollerbach
    •  & Christopher C. Finlay

  • Letter |

    An active core dynamo may have operated on the early Moon. Extraction of palaeomagnetic pole positions on the Moon from magnetic anomalies measured by the Lunar Prospector and Kaguya orbiters suggests that the ancient lunar dynamo experienced reversals and an ancient reorientation of the Moon rotated the geographic locations of the poles.

    • Futoshi Takahashi
    • , Hideo Tsunakawa
    •  & Masaki Matsushima

  • News & Views |

    The molten-iron alloy of the core meets the mantle's silicate rock at Earth's core–mantle boundary. Seismological images reveal hummocks of iron-enriched material above the boundary, highlighting the heterogeneous nature of the mantle.

    • Sebastian Rost

  • News & Views |

    Earth's magnetic field is characterized by a puzzling hemispheric asymmetry. Calculations of core dynamo processes suggest that lopsided growth of the planet's inner core may be part of the cause.

    • Christopher C. Finlay

  • Letter |

    The axis of the geomagnetic field is offset eastwards from Earth’s centre by more than 500 km. Simulations of Earth’s geomagnetic field using a numerical dynamo model show that lopsided growth of the inner core, with faster solidification occurring in one hemisphere, could cause the offset.

    • Peter Olson
    •  & Renaud Deguen

  • Editorial |

    The Earth's magnetic field protects us from solar activity, but the Moon and Mars are more exposed. The upcoming solar maximum is the perfect time to observe how our dynamic Sun affects its planets.

  • News & Views |

    During the middle of the Cretaceous period, the polarity of Earth's magnetic field remained stable. A magnetic survey of oceanic crust formed during that time, however, suggests that the field intensity was surprisingly variable.

    • John A. Tarduno

  • Letter |

    During the Cretaceous Normal Superchron 121–83 million years ago, the polarity of the Earth’s geomagnetic field remained stable for an unusually long time. Deep-tow magnetic data suggest that despite the stability of the polarity, the field varied greatly throughout the interval.

    • Roi Granot
    • , Jérôme Dyment
    •  & Yves Gallet

  • Letter |

    During continental breakup, the onset of seafloor spreading is thought to be marked by the first occurrence of a magnetic anomaly. Analysis of seismic and magnetic data from the Iberia–Newfoundland continental-rift system suggests that the first magnetic anomaly observed here instead represents a magmatic event that pre-dates seafloor spreading.

    • Adrien Bronner
    • , Daniel Sauter
    •  & Marc Munschy

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