To locate the epicenter of an earthquake a seismologist must determine all of the following except add the difference between arrival time is the PNS waves seismographic dad up from the side seismograph location distance from the epicenter to at least three different seismograph location intensity of the earthquake I chose c
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To determine the epicenter of an earthquake, a seismologist must consider several factors. These include:
1. Calculating the difference in arrival times between the P (primary) and S (secondary) waves at different seismograph stations: The time lag between the arrival of P-waves and S-waves at different locations helps determine the distance between each seismograph station and the epicenter. The greater the time difference, the farther away the station is from the earthquake.
2. Measuring the distance from at least three different seismograph stations to the epicenter: By using the differences in arrival times from multiple stations and knowing the speed of seismic waves, the distance to the epicenter can be determined. Triangulation is then used to pinpoint the exact location.
3. Consideration of the intensity of the earthquake: The intensity of the earthquake at different locations, typically measured using the Modified Mercalli Intensity scale, provides information on the strength and effects of the earthquake at various distances from the epicenter. It helps in understanding how the energy released by the earthquake dissipates over distance.
Therefore, to answer your question, the statement "add the difference between arrival time is the PNS waves seismographic dad up from the side seismograph location" does not accurately describe the process of locating the epicenter of an earthquake.