Based on the travel-time graph, what is the distance from the epicenter to the station that recorded the earthquake in the seismograph above ? ( HINT: use the time separation between 1st P-wave and 1st S-wave) __________ kilometers

Applications and Investigations in Earth Science (9th Edition)
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Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
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Based on the travel-time graph, what is the distance from the epicenter to the station that recorded the earthquake in the seismograph above ? ( HINT: use the time separation between 1st P-wave and 1st S-wave) __________ kilometers
Title: Travel-Time Graph

Description:

The graph illustrates the relationship between travel time and epicenter distance for seismic waves, specifically Primary (P) and Secondary (S) waves.

- **X-Axis (Horizontal):** Represents the epicenter distance in kilometers (KM), ranging from 0 to 8000 KM.
- **Y-Axis (Vertical):** Represents the travel time in minutes, ranging from 0 to 24 minutes.

**Graph Details:**

- The **red curve** (labeled "P") shows the travel time for Primary waves. These waves travel faster and arrive at a given distance before the Secondary waves.
- The **blue curve** (labeled "S") indicates the travel time for Secondary waves, which travel more slowly than the Primary waves.

As distance from the epicenter increases, both P and S waves take longer to arrive. The gap between the P and S curves increases with distance, indicating the increasing difference in arrival times of these waves, which is crucial for determining the distance to the earthquake epicenter.
Transcribed Image Text:Title: Travel-Time Graph Description: The graph illustrates the relationship between travel time and epicenter distance for seismic waves, specifically Primary (P) and Secondary (S) waves. - **X-Axis (Horizontal):** Represents the epicenter distance in kilometers (KM), ranging from 0 to 8000 KM. - **Y-Axis (Vertical):** Represents the travel time in minutes, ranging from 0 to 24 minutes. **Graph Details:** - The **red curve** (labeled "P") shows the travel time for Primary waves. These waves travel faster and arrive at a given distance before the Secondary waves. - The **blue curve** (labeled "S") indicates the travel time for Secondary waves, which travel more slowly than the Primary waves. As distance from the epicenter increases, both P and S waves take longer to arrive. The gap between the P and S curves increases with distance, indicating the increasing difference in arrival times of these waves, which is crucial for determining the distance to the earthquake epicenter.
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