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Old 03-06-2023, 11:39 AM   #948 (permalink)
aerohead
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'Space weather and Earth 'seismicity''

The following may explain the cognitive dissonance surrounding the 'so-called' space weather / Earth earthquake connection.'
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1) Seismometers contain ferrous metal components.
2) Ferrous metal components are sensitive to magnetic fields.
3) Electromagnetic shielding of seismometers is very expensive.
4) Near-polar, un-shielded seismometers, as in 'ALL' of the 'Alaskan-193, Transportable Array ( TA ) are susceptible to space-weather-induced Geomagnetically Induced Current ( GIC ) electromagnetic interference, deflecting like compass needles, and introducing 'noise' into the seismographic recordings.
5) The USGS maintains a network of 'All-Sky' cameras, which monitor auroras, and magnetometers used to remove the 'noise; from seismometers.
6) The seismologists get 'clean' earthquake data.
7) And space physicists get 'free' space weather data, by default.
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The takeaway is that, space weather doesn't affect seismicity.
Seismometers 'MAY' record 'shaking' where NONE is occurring.
Magnetically-shielded seismometers, right beside their 'cheap' un-shielded neighbors, indicate 'ZERO' shaking, and zero effects from solar storms.
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The phenomena has been understood since February 2, 2019, when the Black Forest Observatory, Schiltach, Germany recorded a magnetic storm on their seismometer.
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