Question

hand draw in this space or click here to select edit to use the drawing tool. label ( ) the first p - wave and the first s - wave. estimate the time difference ($\delta t$), and then use your graph to find the distance to the epicenter. (as in the gizmo, each vertical line represents 50 seconds.)

Explanation:

Step1: Identify P - wave and S - wave

Locate the first arrival of P - wave and S - wave on the seismogram.

Step2: Calculate $\Delta t$

Count the number of 50 - second intervals between P - wave and S - wave arrival.

Step3: Find distance

Use the $\Delta t$ value and the provided graph to determine the distance to the epicenter.

Answer:

For each set of waveforms:

1. $\Delta t$: Need to visually identify the time - difference between the first P - wave and the first S - wave on the graph (count the number of 50 - second intervals between the arrival times of the P - wave and S - wave).
2. Distance: After obtaining $\Delta t$, use a pre - established graph (presumably a graph relating $\Delta t$ to distance in the Gizmo) to find the distance to the epicenter. Without the actual graph and specific time - difference values from the graph, we cannot provide numerical answers for $\Delta t$ and Distance.