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# Earthquake time travel graph calculator

Earthquake-station distances need to be calculated separately by first picking P and S arrival times on seismograms, and then using a P and S wave travel time graph to determine the distance. We are showing the 1000 latest earthquakes with a magnitude of at least 5. To plot a different selection of events, visit Interactive Earthquake Browser.

The National Seismic Hazards Mapping project provides an online Web tool for determining the probability of a large earthquake within 50 kilometers (~31 miles) of a specific location in the United States over a certain time period. The calculation is based on the latest available information from seismic hazard data. However, asking if it's safe to travel somewhere because of recent. This time difference is called the S minus P (S – P) time and is like the Walk – Run [or Slow Walk – Walk] time of our simulation. Record this difference, in seconds, on Data Table 2. Repeat this step, and record the difference in arrival times. Recover all materials and return to the classroom. Calculating the Origin Time of the Earthquake (10 pts) The first seismic waves felt in Reno, Nevada occurred at 9:31:45 am (hrs:minutes:seconds). Using this time, the information gathered in Part A, and the travel time curve, to calculate the exact time (to the nearest second), when the earthquake originated. Explain how you arrived at your answer. massive earthquakes occurring.

Basic worksheet that leads students through the processes of calculating distances to an epicenter, travel times for P &amp; S waves and origin times of an Earthquake. Leads students through skills such as subtracting time and using a travel time graph.

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