Vth
Vaw (km/s)
(C1)
(8/19) ()-N+5
700-
600-
500-
University of Maryland soho/celias/mtof/PM - CarRot 2207
400
300
100
Aug 7
Aug 11
Aug 15
doy219
day223
ddy227
Aug 19
doy231
Date (2018)
Aug
d05239
Aug 31
ddy243
Figure 2: A coronal plot from SOHO for the time period August 7 to August 31 2018.
1.
2.
Using the graph, carefully determine the speed of the solar wind that reached SOHO at 00:00 on August 21
2018? [1]
The maximum solar wind velocity reached SOHO at 00:30 on August 31 2018. This solar wind had a velocity of
650 km/s. If the distance from the Sun to SOHO is 148.5 X 10° km, determine how long (in days) it took this
solar wind to travel from the Sun to SOHO. Show all work. [3]
3.
At what date and time (to the nearest minute) did this solar wind leave the Sun? [2]