Why are
more than two seismic
stations needed to locate the epicenter of an earthquake? At least 3 Seismic stations are needed to locate a single point. To locate the epicenter of the earthquake shown on page 1, you will need a drawing compass, a pencil, and a copy of the earthquake travel time graph.
How many seismic station are needed to locate an earthquake?
Seismic stations detect earthquakes by the tracings made on seismographs
Why are 3 stations needed to locate an epicenter?
Scientists use triangulation to find the epicenter of an earthquake. When
seismic data is collected
from at least three different locations, it can be used to determine the epicenter by where it intersects. … Knowing this helps them calculate the distance from the epicenter to each seismograph
How many seismograph stations are needed to locate the epicenter and earthquake?
Seismic stations detect earthquakes by the tracings made on seismographs. Tracings made at
three separate seismic stations
are needed to locate an earthquake epicenter. Objective: To identify the location of an earthquake epicenter using a travel time graph and three seismograph tracings.
How many seismograph stations are needed to locate the epicenter of an earthquake A 1 B 2 C 3 D 4?
To find an earthquake epicenter you need at
least three seismographs
. Find the distance from each seismograph to the earthquake epicenter. The interception of the three circles is the epicenter.
Can you find the epicenter with recordings at just two stations?
A single recording station can only calculate distance, but not direction; to cover all possibilities, a complete circle is drawn around that station. If only two earthquake recording stations are used,
the circles will overlap at two points
. Data from a third recording station will eliminate one of these points.
Which wave is the most destructive?
Of the two types of surface waves,
the L-waves
are the most destructive. They can literally move the ground beneath a building faster than the building itself can respond, effectively shearing the base off of the rest of the building.
What is the relationship between S and P waves?
P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves,
rock oscillates perpendicular to the direction of wave propagation
. In rock, S waves generally travel about 60% the speed of P waves, and the S wave always arrives after the P wave.
Which process is used to locate the epicenter of an earthquake?
Triangulation
can be used to locate an earthquake. … The calculated distance from each seismometer
What happens to lag time the further you are from the epicenter?
Which of the statements best describes the relationship between lag time and distance from epicenter? The longer the lag time, the closer the distance. … The shorter the lag time, the farther the distance.
There is no relationship
.
What is the distance between the epicenter and the station for the earthquake recorded?
Hence, the distance from the earthquake epicenter to the seismic station is
2,100 miles
.
What is the time difference in the arrival of P and S wave if the epicenter is 4000 km away from the seismic station in seconds?
For example, this graph tells you that if an earthquake epicenter is 4000 km away, the P-wave will take
7 minutes
to get to you. That is, at your location you will feel the first vi- brations 7 minutes after the rupture occurs at the epicenter.
How many recording stations are required to locate an epicenter?
Per. she epicenter of an earthquake is usually determined by examining seismograms from
at least three recording stations
. From these records, the distance from the epicenter of the earthquake, to each of the recording stations, can be determined.
How do you find the distance to the epicenter of a station?
Measure the difference in arrival times between the first shear (s) wave and the first compressional (p) wave, which can be interpreted from the seismogram.
Multiply the difference by 8.4
to estimate the distance, in kilometers, from the seismograph
What is the importance of determining the location of the earthquake epicenter?
The main importance in determining the epicentre is
so that the fault that ruptured causing the earthquake can be identified
. … If the fault is previously unknown (such as the 2010 Canterbury earthquake), then it is important because it means that the hazard models for the area need improvement.
