A travel-time curve is
a graph of the time that it takes for seismic waves to travel from the epicenter of an earthquake (time and distance = zero) to seismograph stations varying distances away
.
How do you graph a time travel?
How does one interpret a travel time graph?
What information does a time travel graph determine quizlet?
What information does a travel-time graph provide? It will tell you
how far away (distance to) the epicenter of an earthquake was
. Briefly describe the triangulation method used to determine the epicenter of an earthquake. Using a Travel-Time graph, you can obtain the distance to an earthquake’s epicenter.
Which graph shows allows you to find the distance of a seismograph from an earthquake?
A seismogram
is the graph output from a seismograph, which is used to determine the epicenter of an earthquake.
How do seismologists use time travel curves quizlet?
The Travel-time curve shows how much time (vertical axis) it takes the waves to travel the distances (horizontal axis). You can
use the time delay between different waves to locate the distance from the epicenter
.
What is distance time graph?
Distance-time graphs
show how the distance travelled by a moving object changes with time
.
What is meant by travel time in terms of locating an earthquake?
A travel time curve is
a graph of the time that it takes for seismic waves to travel from the epicenter of an earthquake to the hundreds of seismograph stations around the world
. The arrival times of P, S, and surface waves are shown to be predictable.
What does epicentral distance mean?
The epicentral distance is defined as
the distance on the ground surface between the site and the earthquake epicenter
.
How do you read a seismogram time?
The seismogram is “read” like a book,
from left to right and top to bottom
(this is the direction that time increases). As with a book, the right end of any horizontal line “connects” with the left end of the line below it. Each line represents 15 minutes of data; four lines per hour.
How do you read P and S waves?
The P wave will be the first wiggle that is bigger than the background signals
). Because P waves are the fastest seismic waves, they will usually be the first ones that your seismograph records. The next set of seismic waves on your seismogram will be the S waves.
What is a seismograph quizlet?
A seismograph is
an instrument that records and measures the details of an earthquake
. How does a seismograph record seismic waves? A seismograph records data using a seismogram.
How are faults, hypocenters, and epicenters related? The hypocenter is the exact point underground along a fault where the slippage of the two blocks of rock occurs. The epicenter is the point on Earth’s surface that is directly above the hypocenter.
What is the principle of seismograph?
Seismographs operate on the principle of inertia
. Seismometers used in earthquake studies are highly sensitive to ground movements, so that movements as small as 1/10,000,000 centimeters (distances almost as small as atomic spacing) can be detected at very quiet sites.
How can you use a graph of earthquake waves travel distance and time to find the epicenter?
- 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 long does it take an S wave to travel 4000 km?
The graph shows that the S-waves need about
12 minutes: 40 seconds
to travel the same distance. Therefore, if the time separation between the arrival time of the P- and S-waves is 5 minutes:40 seconds, the epicenter must be 4000 km away.
How long does it take AP wave to travel 5000km?
How long does it take an S-Wave to travel 5,000km? Go to the chart! Go to the chart! The recording station tells us it took
6 minutes and 20 seconds
for the P-Wave to reach them.
What can seismologists do using the worldwide network of seismometers quizlet?
What can seismologists do using the worldwide network of seismometers?
Earthquake magnitude can be measured via: The Richter scale. The Modified Mercalli Intensity scale.
What is the place where an earthquake originates?
The location below the earth’s surface where the earthquake starts is called
the hypocenter
, and the location directly above it on the surface of the earth is called the epicenter.
How many seismograph stations are required to locate the geographic epicenter of an earthquake?
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. The spot where those three circles intersect is the epicenter (Figure 13.12).
What are travel graphs?
A travel graph
shows the distance travelled away from a set point against the time
. This allows us to identify the speed at which they have travelled, points at which they were stationary (not moving), and when they are returning to the starting point.
What do velocity time graphs show?
A velocity-time graph shows
the speed and direction an object travels over a specific period of time
. Velocity-time graphs are also called speed-time graphs. The vertical axis of a velocity-time graph is the velocity of the object. The horizontal axis is the time from the start.
How do you read a distance time graph?
How do you graph seismic waves?
What is a region where earthquakes are expected but none has occurred for a long time?
faults, or plate boundaries
. a region where earthquakes are expected but none have occurred for a long time. modified mercalli scale. the damage by earthquakes is described by… tsunami.
