Paleomagnetic records from sediments, archeological artifacts, and lava flows provide the
foundation for studying geomagnetic field changes over 0–100 ka. Late Quaternary time …

As a consequence of the smallness of the electronic fine structure constant, the
characteristic time scale for the free diffusive decay of a magnetic field in a planetary core is …

Topics involved in studies of the Earth's magnetic field and its secular variation range from
the intricate observations of geomagnetism, to worldwide studies of archeomagnetism and …

A long and continuous record of the geomagnetic field intensity shows that intensity
variations are dominated by two modes. Major episodes of field regeneration prevail on …

The K‐Ar based geomagnetic polarity timescale was constructed using data from lavas and
tuffs that bracketed, but rarely dated, the transitions between polarity intervals. Subsequent …

Data-based global paleomagnetic field models provide a more complete view of
geomagnetic excursions than individual records. They allow the temporal and spatial field …

We analyze more than two hundred and forty magnetic polarity reversals and excursions
over forty million years of time from numerical dynamos with heterogeneous boundary heat …

The Earth's magnetic field changed its polarity from the last reversed into today's normal
state approximately 780000 years ago. While before and after this so called …

Palaeomagnetic records from lavas suggest that at least two specific inclined dipolar field
configurations have dominated the reversal process for the past ten million years. These …

A volcanic sequence almost 700 meters thick has been sampled in the Punaruu valley on
the island of Tahiti, southern central Pacific Ocean. Detailed paleomagnetic results have …