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<p class="x_x_x_MsoNormal"><span class=""><b class="">Richard Bono</b> is our next “Geophysics” faculty candidate. </span>The talk is scheduled at <b class="">1</b><b class="">2:00 PM </b>on<b class=""> 22<sup class="">nd</sup> February 2021</b> (today). <u class="">Note:</u><span class=""> Candidate
is 5 hours ahead of us i.e., GMT. </span></p>
<p class="x_x_x_MsoNormal">Zoom: <a target="_blank" href="https://fsu.zoom.us/j/97635987947" class="" style="box-sizing:border-box; background-color:rgb(255,255,255); color:rgb(14,113,235); text-decoration:none; font-variant-ligatures:normal; orphans:2; widows:2">https://fsu.zoom.us/j/97635987947</a></p>
<div class=""><b class="">Title</b>: Our ancient magnetic shield: Core-to-space evolution of the geodynamo</div>
<div class=""><b class="">Abstract</b>: The geodynamo is a long-lived feature of Earth generated by convection of the liquid outer core. The resulting geomagnetic field extends from the core through the solid Earth and into space, where it protects the atmosphere
from erosion due to solar wind. Changes in the structure of the core and mantle influence the strength and shape of the geomagnetic field, which can affect atmospheric shielding provided by the field. Variations in the magnetic shield may have potentially
impacted the evolution of life and the habitability of Earth. Here I will discuss my efforts to use paleomagnetism to understand how Earth’s magnetic field has evolved over the past four billion years using a combination of observations from the rock record,
simulations using numerical dynamos, and compilations of global data sets. I will highlight some of the advancements made on determining the age of the geodynamo, onset of inner core growth, long term trends in field behavior, and inferences on the magnetic
shielding during critical intervals in the evolution of life, with a look towards future work and outstanding questions.</div>
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