Lab Exercise 7 An Incident On the Sun
An Incident On The Sun
Read Laboratory Exercise 7 section 7.4 and answer questions
22-24.
Figure 7.18
Twisted magnetic fields above sunspot 30 erupted on Thursday, July
18th, 2002. The explosion sparked an X2-class solar flare and hurled a
faint coronal mass ejection (CME). The CME arrived on July 19th and
triggered a period of faint high-latitude auroras. This
picture was taken by Dominic Cantin, 75 km north of Québec City
, Canada July 19,2002.
Shortly thereafter, on July 20th 2002, a powerful X3-class
solar flare erupted from a location just behind the Sun's southeastern
limb. The explosion, which was most intense at 21:30 UT (2:30 p.m.
PDT),
caused a radio blackout across North America and the Pacific Ocean.
Figure 7.19 A Hydrogen Alpha spectroheliogram from the Big Bear
Solar Observatory (BBSO). The arrow points in the direction of strong
X-Ray emission recorded in the graph below.
Figure 7.20 This is a time sequence of SOHO-MDI images of the sun
with sunspot labels. They were taken after the 7/20/2002 flare. What is
the label of the Sunspot responsible for the July 20th event?
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July 21, 2002
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July 22, 2002
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July 23, 2002
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July 24, 2002
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July 25, 2002
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