Tim Froehlig & Bevan Gerber-Siff Thursday, July 22, 2004 The Earth’s Magnetosphere & Solar Wind.
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Transcript of Tim Froehlig & Bevan Gerber-Siff Thursday, July 22, 2004 The Earth’s Magnetosphere & Solar Wind.
![Page 1: Tim Froehlig & Bevan Gerber-Siff Thursday, July 22, 2004 The Earth’s Magnetosphere & Solar Wind.](https://reader033.fdocuments.net/reader033/viewer/2022051516/56649e9e5503460f94b9f3cd/html5/thumbnails/1.jpg)
Tim Froehlig & Bevan Gerber-Siff Thursday, July 22, 2004
The Earth’s Magnetosphere & Solar Wind
![Page 2: Tim Froehlig & Bevan Gerber-Siff Thursday, July 22, 2004 The Earth’s Magnetosphere & Solar Wind.](https://reader033.fdocuments.net/reader033/viewer/2022051516/56649e9e5503460f94b9f3cd/html5/thumbnails/2.jpg)
• Solar wind• Magnetosphere• Interactions between the 2
phenomena• Dismal experiment failure• Aurora borealis
What We’re Gonna Say:
What are they?}
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Solar Wind
• The Sun is constantly spraying “stuff”• Speed varies (300-800 km/s)• Particle Density (amount of stuff) also varies
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SoHO• Solar and Heliospheric Observatory• Joint ESA/NASA project• Launched Dec 2, 1995• Lies 1.5 million km from Earth• A bunch of instruments pointed at
the Sun
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Magnetosphere
• The Earth is a large magnet• Has a magnetosphere (field
lines)• Shields us from “stuff”
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Our Dismal Failure
• Tried to make instrument to monitor magnetosphere
• In Tim’s dorm room on 4th floor• Excessive vibration pollution
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In Retrospect…
• Could’ve isolated instruments more• More time to take data• More distance between dot and magnet• Farther from potential electromagnetic fields
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HAARP and Other Magnetometers
• Used data from a series of magnetometers in Alaska and Northern Canada
• More accurate than we possibly could’ve been• Many crippling conditions found in UCSC are
not present
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What Does This Have to do With Anything?!
• Solar wind constantly warps Earth’s magnetosphere
• Causes field line directions and field strength to vary
• Variation is measurable• Solar wind takes ~3 days to reach Earth
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Data Plots!
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July 15, 2004
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Data Plots!July 15, 2004
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Aurora Borealis
• Occurs near poles (weak field lines)• Caused by solar wind hitting upper atmosphere• Light up sky• Without magnetosphere entire sky on sunny side
would light up (but we’d all die)
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“The Day the Solar Wind Disappeared”
• May 10-12, 1999• Solar Wind stopped?• 98% less dense than normal• ½ normal speed• Coronal electrons reached Earth• Über-Aurora Borealis (x-ray spectrum)• Magnetosphere expanded to 5x normal
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Have You Been Paying Attention?
• “From the ashes of disaster…” Failed experiment lead to interesting research
• Lasers are FUN!• What we said:
-Magnetosphere-Solar Wind-Correlation-Our Experiment sucked-Aurora Borealis is COOL