how to get the distance of epicenter from the station

On a map, the distance of an epicenter from a seismic station can be represented as a How to use the Earth Science Reference Tables to determine the epicenter of an earthquake from a seismogram. Using the distance scale on the station map, set your compass to the correct distance and draw a circle on the map, centered on the station. distance = (30 s / 8 s) × 100 km (cancel out unit second) = 3. Another method of locating an earthquake is to use the P-wave arrival-time minus origin-time (P - … Seismic wave - Wikipedia. For example, say your map has a scale where one centimeter is equal to 100 kilometers. Using an earthquake recording station, learn how to determine the distance between the station and an earthquake based on the time difference between the arrival of the primary and secondary seismic waves. Do the same thing for the distance to the epicenter that the other seismograms recorded (with the location of those seismographs at the center of their circles). 2. 1. The circles from these two stations cross each other at two points. Triangulation is required to determine exactly where it happened. RYAO Answer: The distance of the epicenter from the seismic station is equals to 127 km (minimum). The epicenter is at the surface directly above the hypocenter (also called the focus) of the earthquake somewhere below the surface. To determine the distance of an earthquake epicenter: 1. Measure the amplitude of the strongest wave. You can observe the P- and S-wave arrivals on a seismogram to calculate how far away an earthquake was from your station. Here is the link to the activity itself: goo.gl/3kB29Students learn how to determine the epicenter of an earthquake using seismographic data. Finding the Distance to the Epicenter and the Earthquake's Magnitude Figure 2 - Use the amplitude to derive the magnitude of the earthquake, and the distance from the earthquake to the station. Upper station : Distance = 1065 km Lower Station Distance = 1350 km The larger the lag time, the larger the distance of the station from the epicenter. Seismic wave - Wikipedia. The distance is 355 kilometers. Finding the Distance to the Epicenter and the Earthquake's Magnitude. Use the scale in the middle of the maps to find the distance from the station. epicenter, but you still don't know exactly where the earthquake occurred. from the epicenter. Which two places could the epicenter be located now? Choose one of the recording stations and measure the computed distance on the map scale ( the scale of the map is 1 cm: 70 km). Do all four stations (the fourth station is for accuracy). Compute the distance of the epicenter from each of the stations using this formula: d = time difference x 100 km 8 seconds where: d = distance (km) td = time difference in the arrival time of P-wave and S-wave (seconds) This formula is suited because 8 seconds is the interval between the times of arrival of the P-wave and S-wave at a distance of 100 km. The Láska's empirical rule provides an approximation of epicentral distance in the range of 2 000 − 10 000 km. Finding the Distance to the Epicenter from a Seismic Station Determine the arrival times of the P-wave and the S-wave. Enter these data in Table 1. 51 4 3 2 1 0 500 2500 3000 1000 1500 2000 Distance in miles We've done the first one for NYC. The, Place a ruler (or straight edge) on the chart between the points you marked for the distance to the epicenter and the amplitude. With distance data from a second station, you can narrow this down to either of two points of intersection of the circles. Find the point for 24 seconds on the left side of the chart below and mark that point. THREE3 stations … This intersection is the epicenter. 5. Figures 1 and 2 are from Bolt, 1978. Use the compass to draw a circle around the station the correct distance from the epicenter. This number will be used to tell you how far your seismograph is from the epicenter of the earthquake. All of the circles should overlap. This should be done with all three and it should produce an overlap. The intersection of the 3 cirles gives epicenter location. The circle represents all possible locations at this fixed, determined distance from the seismograph. To determine the difference between the arrival of the P waves and S waves, scroll … Using Distance Values from Three Seismograms to Determine the Location of an Epicenter . Cloudflare Ray ID: 625780b55c274d8a Otherwise, all that you'd know is that the ground shook. 4. If you know the distance from a station, you know that the epicenter is located on a circle of that radius from the seismic station. The epicenter will be located in the region where the circles overlap. Set the Radius to the distance of station B .

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