- Measure the distance between the first P wave and the first S wave. …
- Find the point for 24 seconds on the left side of the chart of simplified S and P travel time curves and mark that point. …
- Measure the amplitude of the strongest wave.
How many locations do scientists need to locate an earthquake?
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. Every earthquake is recorded on numerous seismographs
How do we determine the location of a recent earthquake?
Triangulation can be used to locate an earthquake. The
seismometers are
shown as green dots. The calculated distance from each seismometer to the earthquake is shown as a circle. The location where all the circles intersect is the location of the earthquake epicenter.
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.
How do you locate the epicenter of an earthquake?
Triangulation can be used to locate an earthquake. The seismometers are shown as green dots. The calculated distance from each seismometer to the earthquake is shown as a circle.
The location where all the circles intersect
is the location of the earthquake epicenter.
How many seismic stations are needed to locate the epicenter of an 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.
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.
How do you track an earthquake?
The simplest method of locating an earthquake on a globe is to find the
time interval between the P- and S-wave arrivals at several seismograph
What is the difference between earthquake epicenter and focus?
The focus is the place inside Earth’s crust where an earthquake originates. The point on the Earth’s surface directly above the focus is the epicenter. When energy is released at the focus, seismic waves
travel outward
from that point in all directions.
What is intensity of earthquake?
The effect of an earthquake on the Earth’s surface is called the intensity. … The Modified Mercalli Intensity value assigned to a specific site after an earthquake has a more meaningful measure of severity to the nonscientist than the magnitude because intensity refers
to the effects actually experienced at that place
.
How many seismograms are at least needed to locate the earthquake epicenter?
Triangulation is required to determine exactly where it happened.
Three seismographs
are needed. A circle is drawn from each of the three different seismograph locations, where the radius of each circle is equal to the distance from that station to 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.
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 wave is the fastest?
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.
Does the ground ripple in an earthquake?
In a normal earthquake,
the built-up tensions in Earth’s crust release with a jolt in mere seconds
. This sends out a series of waves known as a “wave train” that radiates from the point of the rupture, explains Stephen Hicks, a seismologist at the University of Southampton.
Which wave causes the most damage to buildings?
Love waves
