Question

2. Study the data showing the difference in the arrival time of P-waves and S-
rocedure:
waves on three seismic recording stations.
Distance (d) of
epicenter from the
station (Km
Recording station
Time difference (Td) in
the arrival of P-waves
and S-waves (seconds)
Batangas
44.8
Puerto Princesa
32
Davao
38.4
2. Compute the distance of the epicenter from each of the stations using the
formula.
Td
d
X 100km
8 Seconds
3. Choose one of the recording stations and measure the computed distance on
the map scale (the scale of the map is 1.5 cm: 200Km). For example, if
d-500Km, ther:
d= (500 km) (1.5 cm
200
= 750 cm
200
d- 3.75 cm
1. Use a ruler to set for that computed distance.
5. Center your compass on the station you have chosen. Draw a circle.
5. Repeat steps 3 and 4 for the rest of the stations. You should get three circles
that intersect or nearly intersect at
a point. This
This intersection is
the epicenter​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

2. S waves, which travel at about half the speed of P waves, arrive later. A seismic station close to the earthquake records P waves and S waves in quick succession. With increasing distance from the earthquake the time difference between the arrival of the P waves and the arrival of the S waves increases.